How to populate TableView with jSON in Swift 3 - ios

Sorry guys it is lil old me again. I am reaching out as I need help with a second tableView I would like to implement in a another view controller. I have copied this code basically from another tableView controller which actually works. So I'm not sure where I messed up here but I would really appreciate the help.
class MCViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
let message_url = "https://www.distribber.com/api/resources/get_film_message/film_id/3825"
let send_url = "https://www.distribber.com/api/resources/send_film_message"
let film_id = "3825"
var messageArray = [String]()
weak var messageView : UITableView!
func messageView(_ messageView: UITableView, numberOfRowsInSection section: Int) -> Int {
return messageArray.count
}
func messageView(_ messageView: UITableView, cellForRowAt indexPath: IndexPath) -> MessageTableViewCell {
let cell = messageView.dequeueReusableCell(withIdentifier: "msgContent", for:indexPath) as! MessageTableViewCell
// Configuring Cell
cell.msgContent.text = messageArray[indexPath.row]
// Returning the cell
return cell
}
#IBOutlet weak var MessageInput: UITextField!
#IBAction func Sendmsg(_ sender: Any) {
Sendmsg(username:MessageInput.text!, password: film_id)
}
override func viewDidLoad() {
super.viewDidLoad()
messageView.dataSource = self
messageView.delegate = self
// Do any additional setup after loading the view.
//let post_data: NSDictionary = NSMutableDictionary()
// post_data.setValue(username, forKey: "username")
// post_data.setValue(password, forKey: "password")
let url:URL = URL(string: message_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "GET"
request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
// Do any additional setup after loading the view.
var paramString = ""
// for (key, value) in post_data
// {
// paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
// }
//
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
if let parsedData = json as? [[String:Any]] {
for dict in parsedData {
if let title = dict["message"] as? String {
self.messageArray.append(title)
print(json)
}
}
OperationQueue.main.addOperation({
self.messageView.reloadData()
})
}
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
if let data_block = server_response["data"] as? NSDictionary
{
if let session_data = data_block["session"] as? String
{
// self.login_session = session_data
let preferences = UserDefaults.standard
preferences.set(session_data, forKey: "session")
// DispatchQueue.main.async(execute: self.LoginDone)
}
}
})
task.resume()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func Sendmsg(username:String, password:String)
{
let post_data: NSDictionary = NSMutableDictionary()
post_data.setValue(username, forKey: "message")
post_data.setValue(password, forKey: "film_id")
let url:URL = URL(string: send_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
var paramString = ""
for (key, value) in post_data
{
paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
}
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
print(json)
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
// if let data_block = server_response["data"] as? NSDictionary
// {
// if let session_data = data_block["session"] as? String
// {
// self.login_session = session_data
//
// let preferences = UserDefaults.standard
// preferences.set(session_data, forKey: "session")
//
// DispatchQueue.main.async(execute: self.LoginDone)
// }
// }
//
})
task.resume()
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}

You're implementing UITableViewDataSource but not implementing it's required methods.
func tableView(UITableView, cellForRowAt: IndexPath)
func numberOfSections(in: UITableView)
Implement those two and the not conforming to protocol error should go away.

Related

how make REST API Call with Model class in swift 3 ios

i want to make REST API call in swift 3.0 with model classes of API code . Can any one help me to solved my issue?
let USER_LIST_FIRMWISE_URL = "\(BASE_URL2)user_list_firm_wise.php"
func userListFirmwiseRequest(firmid:String) -> URLRequest {
let Url = URL(string: (utility?.USER_LIST_FIRMWISE_URL)!)
var request = URLRequest(url: Url!)
request.httpMethod = "POST"
request.cachePolicy = .reloadIgnoringCacheData
let paramString = "firm_id=\(firmid)"
request.httpBody = paramString.data(using: String.Encoding.utf8)
return request
}
func getuserList() -> Void {
var request = mainApp.reqRes?.userListFirmwiseRequest(firmid: firmID)
request?.httpMethod = "POST"
print("request")
EZLoadingActivity.show("", disableUI: true)
let task = URLSession.shared.dataTask(with: request!) { (data: Data?, response: URLResponse?, error: Error?) in
DispatchQueue.main.async
{
do {
guard let data = data, error == nil else {
print("Error=\(String(describing: error))")
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200{
print("Status code should be 200, but is \(httpStatus.statusCode)")
print("Response String:\(String(describing: response))")
}
let jsonString = try? JSONSerialization.jsonObject(with: data, options: [])
guard let JsonObject = try? jsonString as AnyObject else{
return
}
guard let Success = try? JsonObject["success"] as! Int else{
return
}
print("Succee Resul :\(Success)")
if Success > 0{
guard let Message = try? JsonObject["message"] as Any else{
return
}
guard let JsonObjectForUser = try? Message as? AnyObject else {
return
}
}
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? NSDictionary ?? nil
if let parseJSON = json {
let dataDic = parseJSON.value(forKey: "message") as! NSMutableArray
self.arrayUserNameList = dataDic.value(forKey: "user_name") as! [String]
self.arrayUserData = dataDic
print(self.arrayUserNameList)
self.picker.reloadAllComponents()
EZLoadingActivity.hide()
}
} catch{
print(error)
EZLoadingActivity.hide()
}
}
}
task.resume()
}
i have used general code of NSurlsession for API call but it's too much code i have to write every time in every call. so i want common class for API CAll. but how to make common class for API call in swift 3.0
Try something like that
import Foundation
struct modelApi {
var arrayUserData: NSMutableArray = []
var arrayUserNameList: [String] = []
init(data:Data)
{
do {
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? NSDictionary ?? nil
if let parseJSON = json
{
let dataDic = parseJSON.value(forKey: "message") as! NSMutableArray
self.arrayUserNameList = dataDic.value(forKey: "user_name") as! [String]
self.arrayUserData = dataDic
}
}
catch
{
print("Error")
}
}
}
import Foundation
class HttpRequest{
static let TIME_OUT_FOR_RESOURCE = 60.0
static let TIME_OUT_FOR_REQUEST = 30
static func sendHttpGetRequest(endPoint:String,responseMsg:#escaping (_ responseString:String?,_ error:String?)->Void) {
// let JSON_CONTENT_TYPE = "application/json"
// let HTTP_OK = 200
//Content Types
//1 ""Content-Type" = "text/html; charset=UTF-8";"
//2 "Content-Type" = "application/json";
let url = URL.init(string: endPoint)
let session = URLSession.shared
session.configuration.timeoutIntervalForRequest = TimeInterval(TIME_OUT_FOR_REQUEST)
session.configuration.timeoutIntervalForResource = TimeInterval(TIME_OUT_FOR_RESOURCE)
let task = session.dataTask(with: url!) {
data,
response ,
error in
guard error == nil
else{
responseMsg(nil,error!.localizedDescription)
return }
let responseString = String.init(data: data!, encoding: String.Encoding.utf8)!
responseMsg(responseString,nil)
}
task.resume()
}
static func setHttpPostRequest(endPoint:String,param:[String:Any],responseMsg:#escaping (_ responseJson:[String:Any]?,_ error:String?)->Void){
let url = URL.init(string:endPoint)
let session = URLSession.shared
session.configuration.timeoutIntervalForRequest = TimeInterval(TIME_OUT_FOR_REQUEST)
session.configuration.timeoutIntervalForResource = TimeInterval(TIME_OUT_FOR_RESOURCE)
var request = URLRequest.init(url: url!)
request.httpMethod = "POST"
do{
request.httpBody = try JSONSerialization.data(withJSONObject: param, options: .prettyPrinted)
}catch let error{
print(error)
}
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
guard error == nil else {
responseMsg(nil,error?.localizedDescription)
return
}
guard let data = data else {
responseMsg(nil,"Something went wrong")
return
}
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
responseMsg(json,nil)
// print(json)
// handle json...
}
} catch let error {
responseMsg(nil,error.localizedDescription)
// print(error.localizedDescription)
}
})
task.resume()
}}
BASEWEBSERVICE_ClASS:
// where RTCommonResponse is common response Model class. generated by ahmad ali json exporter tool.
import UIKit
import KRProgressHUD
import Foundation
import SystemConfiguration
protocol BaseWebserviceDelegate {
func sucessful(data : RTCommonResponse)
func failedWithMessage(message : String)
}
class BaseWebservice: NSObject
{
var webData : NSMutableData!
var statusCode : Bool!
var appDelegate : AppDelegate!
var baseDelegate : BaseWebserviceDelegate!
let opQueue = OperationQueue()
func initWithDelegate(aDelegate : BaseWebserviceDelegate) {
baseDelegate = aDelegate
appDelegate = UIApplication.shared.delegate as! AppDelegate
//return self
}
func callWithBaseRequest(requestData : Dictionary<String, Any>, aURL : String, method : String, showHUD : Bool ) {
let hudShow = showHUD && BaseWebservice.isInternetAvailable()
let url4 = URL(string: aURL as String)!
//let session4 = URLSession(configuration: sessionConfiguration, delegate: self, delegateQueue: self.opQueue)
//let session4 = URLSession.shared
let session4: URLSession = {
let configuration = URLSessionConfiguration.default
configuration.timeoutIntervalForRequest = 9999
configuration.timeoutIntervalForResource = 9999
return URLSession(configuration: configuration, delegate: nil, delegateQueue: nil)
}()
let request = NSMutableURLRequest(url: url4)
request.httpMethod = method
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
//let paramString = "data=Hello"
//request.httpBody = paramString.data(using: String.Encoding.utf8)
if method == Constants.POST {
let cookieHeader = (requestData.flatMap({ (key, value) -> String in
return "\(key)=\(value)"
}) as Array).joined(separator: "&")
let postData : Data = cookieHeader.data(using: .utf8)!
request.httpBody = postData
AppDelegate.printLog(log: "Request started for url : " + aURL + " Peram : " + cookieHeader)
}
//request.addValue("multipart/form-data", forHTTPHeaderField: "Content-Type")
let task = session4.dataTask(with: request as URLRequest) { (data, response, error) in
guard let _: Data = data, let _: URLResponse = response, error == nil else {
print("*****error " + (error?.localizedDescription)!)
DispatchQueue.main.async {
KRProgressHUD.dismiss()
self.baseDelegate.failedWithMessage(message: (error?.localizedDescription)!)
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
return
}
let dataString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
// print("*****This is the data 4: \(String(describing: dataString))") //JSONSerialization
let dictionary: Dictionary? = self.convertToDictionary(text: dataString! as String)
//let content = Content.init(fromDictionary: dictionary!)
AppDelegate.printLog(log:"Responce recived for url : " + aURL)
if dictionary == nil {
DispatchQueue.main.async {
KRProgressHUD.dismiss()
self.baseDelegate.failedWithMessage(message: "Something went wrong, try after some time")
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
return
}
//self.baseDelegate.sucessful(data: commonResponse)
DispatchQueue.main.async {
let commonResponse : RTCommonResponse = RTCommonResponse.init(fromDictionary: dictionary!)
if commonResponse.status == "ok" {
self.baseDelegate.sucessful(data: commonResponse)
KRProgressHUD.dismiss()
}else{
let error : RTError = RTError.init(fromDictionary: commonResponse.data!)
KRProgressHUD.dismiss()
self.baseDelegate.failedWithMessage(message: error.error)
}
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
}
//let task = session4.dataTask(with: request as URLRequest)
if hudShow {
DispatchQueue.main.async {
KRProgressHUD.show()
}
}
DispatchQueue.main.async {
UIApplication.shared.isNetworkActivityIndicatorVisible = true
}
// session4
task.resume()
}
func convertToDictionary(text: String) -> [String: Any]? {
if let data = text.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
}
}
return nil
}
static func isInternetAvailable() -> Bool
{
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags = SCNetworkReachabilityFlags()
if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
return false
}
let isReachable = flags.contains(.reachable)
let needsConnection = flags.contains(.connectionRequired)
return (isReachable && !needsConnection)
}
}
ForgotpasswordWS_Class:
// where RTForgotPasswordResponse is common response Model class. generated by ahamad ali json exporter tool.
import UIKit
protocol ForgotPasswordWebserviceDelegate {
func forgotPasswordSucessful(data : RTForgotPasswordResponse)
func forgotPasswordFailedWithMessage(message : String)
}
class ForgotPasswordWebservice: BaseWebservice {
var delegate : ForgotPasswordWebserviceDelegate!
init(aDelegate : ForgotPasswordWebserviceDelegate) {
super.init()
super.initWithDelegate(aDelegate: self as BaseWebserviceDelegate)
delegate = aDelegate
}
func initWithDelegate(aDelegate : ForgotPasswordWebserviceDelegate) {
super.initWithDelegate(aDelegate: self as BaseWebserviceDelegate)
delegate = aDelegate
//return self
}
func call(request : RTForgotPasswordRequest) {
let url = Constants.BASE_URL + "user/retrieve_password/"
self.callWithBaseRequest(requestData: request.toDictionary() , aURL: url, method: Constants.POST, showHUD: true)
}
}
extension ForgotPasswordWebservice : BaseWebserviceDelegate{
func sucessful(data : RTCommonResponse){
let content = RTForgotPasswordResponse.init(fromDictionary: data.data! )
//data.content = content
self.delegate.forgotPasswordSucessful(data: content)
}
func failedWithMessage(message : String){
self.delegate.forgotPasswordFailedWithMessage(message: message)
}
}
YourVIEWCONTROLLER_Class:
// just add extension to your view controller
extension yourViewController : ForgotPasswordWebserviceDelegate {
func forgotPasswordFailedWithMessage(message: String) {
let when = DispatchTime.now() + 1
DispatchQueue.main.asyncAfter(deadline:when){
self.showSnackBar(message: message)
}
}
func forgotPasswordSucessful(data: RTForgotPasswordResponse) {
let when = DispatchTime.now() + 1
DispatchQueue.main.asyncAfter(deadline:when) {
self.showSnackBar(message: data.msg)
//self.displayAlertMessage(messageToDisplay: "Reset Password Link Send")
}
}
}
// when you call API you have to write JUST line of CODE That's IT!!!
#IBAction func forgotbtntapped(_ sender: Any) {
let forgotws : ForgotPasswordWebservice = ForgotPasswordWebservice.init(aDelegate: self)
let forgotrequest : RTForgotPasswordRequest = RTForgotPasswordRequest();
forgotrequest.userLogin = forgotEmailTextField.text!
forgotws.call(request: forgotrequest)
}
Another simple way to call web API
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if indexPath.row == 0 {
cell.separatorInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: .greatestFiniteMagnitude)
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell : CCell = self.tblV.dequeueReusableCell(withIdentifier: "cell") as! CCell
cell.lblName?.text = "ABCD"
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
func getClassList(completion: ((NSArray?, NSError?) -> Void)?) {
let myUrl = URL(string: "http://papili.us/studycentral/api/getClassList.php");
var request = URLRequest(url:myUrl!)
request.httpMethod = "POST"// Compose a query string
let postString = "";
request.httpBody = postString.data(using: String.Encoding.utf8);
let task = URLSession.shared.dataTask(with: request) { (data: Data?, response: URLResponse?, error: Error?) in
if error != nil {
print("error=\(String(describing: error))")
completion?(nil, error as NSError?)
return
}
print("response = \(String(describing: response))")
//Convert response sent from a server side script to a NSDictionary object:
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
if json != nil {
let newdata : NSDictionary = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as! NSDictionary
let datalist : KRootClass = KRootClass.init(fromDictionary: newdata as! [String : Any])
print(datalist.classID)
print(datalist.className)
print(datalist.teacherTitle)
print(datalist.teacherLastName)
print(datalist.teacherFirstName)
}
} catch {
print(error)
completion?(nil, error as NSError)
}
}
task.resume()
}

Login function with activity indicator

I am currently doing a login test and have to log in again to log in. After pressing the login button to send the request to the server, the activity indicator is displayed on the screen until the activity indicator is stopped and the activity indicator is stopped The next page, I would like to open another thread used to implement the activity indicator, but I do not know how to implement, please help!
And this code is modified from http://www.kaleidosblog.com/how-to-create-a-login-screen-page-in-swift-3-authenticate-an-user-and-keep-the-session-active.
class ViewController: UIViewController {
let login_url = "http://www.kaleidosblog.com/tutorial/login/api/Login"
let checksession_url = "http://www.kaleidosblog.com/tutorial/login/api/CheckSession"
#IBOutlet var username_input: UITextField!
#IBOutlet var password_input: UITextField!
#IBOutlet var login_button: UIButton!
var login_session:String = ""
var activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)
override func viewDidLoad() {
super.viewDidLoad()
username_input.text = "try#me.com"
password_input.text = "test"
activityIndicator.hidesWhenStopped = true;
activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.gray;
activityIndicator.center = view.center;
let preferences = UserDefaults.standard
if preferences.object(forKey: "session") != nil
{
login_session = preferences.object(forKey: "session") as! String
check_session()
}
}
#IBAction func DoLogin(_ sender: AnyObject) {
login_now(username:username_input.text!, password: password_input.text!)
}
#IBAction func backToMain(_ segue:UIStoryboardSegue){
let preferences = UserDefaults.standard
preferences.removeObject(forKey: "session")
self.dismiss(animated: true, completion: nil)
}
func login_now(username:String, password:String)
{
let post_data: NSDictionary = NSMutableDictionary()
post_data.setValue(username, forKey: "username")
post_data.setValue(password, forKey: "password")
let url:URL = URL(string: login_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
var paramString = ""
for (key, value) in post_data
{
paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
}
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
if let data_block = server_response["data"] as? NSDictionary
{
if let session_data = data_block["session"] as? String
{
self.login_session = session_data
let preferences = UserDefaults.standard
preferences.set(session_data, forKey: "session")
DispatchQueue.main.async {
self.view.addSubview(self.activityIndicator)
}
}
}
})
task.resume()
LoginDone()
}
func check_session()
{
let post_data: NSDictionary = NSMutableDictionary()
post_data.setValue(login_session, forKey: "session")
let url:URL = URL(string: checksession_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
var paramString = ""
for (key, value) in post_data
{
paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
}
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
if let response_code = server_response["response_code"] as? Int
{
if(response_code == 200)
{
DispatchQueue.main.async {
self.view.addSubview(self.activityIndicator)
}
}
else
{
}
}
})
task.resume()
}
func LoginDone()
{
self.performSegue(withIdentifier: "gotomenu", sender: nil)
}
func startActivityIndicator(){
activityIndicator.startAnimating()
}
func stopActivityIndicator() {
activityIndicator.stopAnimating()
}
}
Try to use SVProgressHUD. It's the simplest framework, that I have ever seen. SVProgressHUD on GitHub
Install:
In your podfile:
pod 'SVProgressHUD'
Then in terminal:
pod install
How to use:
import SVProgressHUD
to start:
SVProgressHUD.show()
to dismiss:
SVProgressHUD.dismiss()
Its very simple and usefull. Just try it.
Hope it helps
Replace this code code with old code:
class ViewController: UIViewController {
let login_url = "http://www.kaleidosblog.com/tutorial/login/api/Login"
let checksession_url = "http://www.kaleidosblog.com/tutorial/login/api/CheckSession"
#IBOutlet var username_input: UITextField!
#IBOutlet var password_input: UITextField!
#IBOutlet var login_button: UIButton!
var login_session:String = ""
var activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)
override func viewDidLoad() {
super.viewDidLoad()
username_input.text = "try#me.com"
password_input.text = "test"
activityIndicator.hidesWhenStopped = true
activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.gray
activityIndicator.center = view.center
activityIndicator.isHidden = true
self.view.addSubview(self.activityIndicator)
let preferences = UserDefaults.standard
if preferences.object(forKey: "session") != nil
{
login_session = preferences.object(forKey: "session") as! String
check_session()
}
}
#IBAction func DoLogin(_ sender: AnyObject) {
login_now(username:username_input.text!, password: password_input.text!)
}
#IBAction func backToMain(_ segue:UIStoryboardSegue){
startActivityIndicator()
activityIndicator.isHidden = false
let preferences = UserDefaults.standard
preferences.removeObject(forKey: "session")
self.dismiss(animated: true, completion: nil)
stopActivityIndicator()
activityIndicator.isHidden = true
}
func login_now(username:String, password:String)
{
activityIndicator.isHidden = false
startActivityIndicator()
let post_data: NSDictionary = NSMutableDictionary()
post_data.setValue(username, forKey: "username")
post_data.setValue(password, forKey: "password")
let url:URL = URL(string: login_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
var paramString = ""
for (key, value) in post_data
{
paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
}
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
self.stopActivityIndicator()
self.activityIndicator.isHidden = true
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
if let data_block = server_response["data"] as? NSDictionary
{
if let session_data = data_block["session"] as? String
{
self.login_session = session_data
let preferences = UserDefaults.standard
preferences.set(session_data, forKey: "session")
DispatchQueue.main.async {
self.LoginDone()
}
}
}
})
task.resume()
}
func check_session()
{
let post_data: NSDictionary = NSMutableDictionary()
post_data.setValue(login_session, forKey: "session")
let url:URL = URL(string: checksession_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
var paramString = ""
for (key, value) in post_data
{
paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
}
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
if let response_code = server_response["response_code"] as? Int
{
if(response_code == 200)
{
DispatchQueue.main.async {
self.view.addSubview(self.activityIndicator)
}
}
else
{
}
}
})
task.resume()
}
func LoginDone()
{
self.performSegue(withIdentifier: "gotomenu", sender: nil)
}
func startActivityIndicator(){
activityIndicator.startAnimating()
}
func stopActivityIndicator() {
activityIndicator.stopAnimating()
}
}

UITableView crashes at start at tableview.datasource

I have implemented two UITableview in seperate ViewController classes. After successfully adding the code for the second UItableView my project builds but stops after loading.
It stops with a red line on:
tableView.delegate.dataSource = self
With an error that reads:
Thread 1 EXEC_BAD_INSTRUCTION (code-EXC_i386_INVOP,subcode=0x0)
AND
fatal error: unexpectedly found nil while unwrapping an Optional value
Since this didn't happen until adding the second UItableview in the second view controller I'm wondering if maybe my code is conflicting with each other. I will post copies of both view controllers. What should I change?
By the way: FilmsViewController is where the app is crashing. Although it was working prior to adding MCViewController Films:
B:
class FilmsViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
weak var tableView : UITableView!
var FilmArray = [String]()
let film_url = "https://www.testing.com/api/resources/films/1"
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return FilmArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "mycell", for:indexPath) as! FilmsAPITableViewCell
// Configuring Cell
cell.movieTitle.text = FilmArray[indexPath.row]
// Returning the cell
return cell
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
let url:URL = URL(string: film_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "GET"
request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
let paramString = ""
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
var json:Any?
do
{
if let existingData = data {
json = try JSONSerialization.jsonObject(with: existingData, options: [])
}
// Prasing JSON
if let parsedData = json as? [[String:Any]] {
for dict in parsedData {
if let title = dict["title"] as? String {
self.FilmArray.append(title)
print(json)
}
}
OperationQueue.main.addOperation({
self.tableView.reloadData()
})
}
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
if let data_block = server_response["data"] as? NSDictionary
{
if let session_data = data_block["session"] as? String
{
// self.login_session = session_data
let preferences = UserDefaults.standard
preferences.set(session_data, forKey: "session")
// DispatchQueue.main.async(execute: self.LoginDone)
}
}
})
task.resume()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
MC:
class MCViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
let message_url = "https://www.testing.com/api/resources/get_film_message/film_id/3825"
let send_url = "https://www.testing.com/api/resources/send_film_message"
let film_id = "3825"
var messageArray = [String]()
weak var tableView : UITableView!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return messageArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "msgContent", for:indexPath) as! MessageTableViewCell
// Configuring Cell
cell.msgContent.text = messageArray[indexPath.row]
// Returning the cell
return cell
}
#IBOutlet weak var MessageInput: UITextField!
#IBAction func Sendmsg(_ sender: Any) {
Sendmsg(username:MessageInput.text!, password: film_id)
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
// Do any additional setup after loading the view.
//let post_data: NSDictionary = NSMutableDictionary()
// post_data.setValue(username, forKey: "username")
// post_data.setValue(password, forKey: "password")
let url:URL = URL(string: message_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "GET"
request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
// Do any additional setup after loading the view.
var paramString = ""
// for (key, value) in post_data
// {
// paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
// }
//
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
if let parsedData = json as? [[String:Any]] {
for dict in parsedData {
if let title = dict["message"] as? String {
self.messageArray.append(title)
print(json)
}
}
}
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
if let data_block = server_response["data"] as? NSDictionary
{
if let session_data = data_block["session"] as? String
{
// self.login_session = session_data
let preferences = UserDefaults.standard
preferences.set(session_data, forKey: "session")
// DispatchQueue.main.async(execute: self.LoginDone)
}
}
})
task.resume()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func Sendmsg(username:String, password:String)
{
let post_data: NSDictionary = NSMutableDictionary()
post_data.setValue(username, forKey: "message")
post_data.setValue(password, forKey: "film_id")
let url:URL = URL(string: send_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
var paramString = ""
for (key, value) in post_data
{
paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
}
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data!, options: [])
print(json)
}
catch
{
return
}
guard let server_response = json as? NSDictionary else
{
return
}
// if let data_block = server_response["data"] as? NSDictionary
// {
// if let session_data = data_block["session"] as? String
// {
// self.login_session = session_data
//
// let preferences = UserDefaults.standard
// preferences.set(session_data, forKey: "session")
//
// DispatchQueue.main.async(execute: self.LoginDone)
// }
// }
//
})
task.resume()
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
Where are you initializing tableView? Seems like it might be nil....
tableView = UITableView(frame: frame)
If you're using storyboard/xib, you can also hook tableView up as an IBOutlet.

pass id to another screen to display the particular id - product and its details

I have one collection view which have to display only the category name and its image. And i am showing this category name, image by doing some api calling. And also for each category name i will get the customer id for each category name. Here is the full code for that
func apicalling () {
let headers = [
"content-type": "application/json",
"cache-control": "no-cache",
"postman-token": "7adebcbe-18b4-d2a7-2159-2fbcaea27edd"
]
let parameters = [
"customerID": "1",
"listType": "2"
]
do {
let postData = try JSONSerialization.data(withJSONObject: parameters, options :[])
let request = NSMutableURLRequest(url: NSURL(string: "http://example/categoryname.php")! as URL,
cachePolicy: .useProtocolCachePolicy,timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
if (error != nil) {
///print(error)
} else {
DispatchQueue.main.async(execute: {
if let json = (try? JSONSerialization.jsonObject(with: data!, options: [])) as? Dictionary<String,AnyObject>
{
let status = json["status"] as? Int;
if(status == 1)
{
//print("SUCCESS....")
if let typeValues = json["categories"] as? [NSDictionary]
{
DispatchQueue.main.async(execute: {
// print("INSIDE CATEGORIES")
for item in typeValues
{
// print("INSIDE LISTING ITEMS...")
self.BTdata.append(BTData(json:item))
}
//print(self.BTdata[0].BTNames)
self.collectionView!.reloadData()
})
}
}
}
})
}
})
dataTask.resume()
} catch {
// print("JSON serialization failed: \(error)")
}
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return BTdata.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell
cell.CatName.text = BTdata[(indexPath as NSIndexPath).row].BTNames
let imgURL: URL = URL(string: BTdata[(indexPath as NSIndexPath).row].BTImage!)!
let request: URLRequest = URLRequest(url: imgURL)
let session = URLSession.shared
let task = session.dataTask(with: request, completionHandler: {
(data, response, error) -> Void in
if (error == nil && data != nil)
{
func display_image()
{
cell.ProductImg.image = UIImage(data:data!)
}
DispatchQueue.main.sync(execute: display_image)
}
})
task.resume()
return cell
}
func getIndexPathForSelectedCell() -> IndexPath?
{
var indexPath:IndexPath?
if collectionView.indexPathsForSelectedItems!.count > 0 {
indexPath = collectionView.indexPathsForSelectedItems![0]
}
return indexPath
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "showDetails"
{
if let indexPath = getIndexPathForSelectedCell()
{
let ContainerviewController = segue.destination as! DetailVC
ContainerviewController.BTdata = [BTdata[(indexPath as NSIndexPath).row]]
print("Printing value on collection click.....")
print(BTdata[(indexPath as NSIndexPath).row].BTIds)
}
}
}
And form my above code you can see that, i have done the segue to another view controller. And i am passing the ID to another view controller.In another view controller, i need to display the product items that user select in my first view controller.
In my second view controller, i have done some api to show all product .So the flow is :
When user press any category name in my first view controller, it have to go to second view controller and should so the particular product for the selected category name. Here is the code of my second VC :
Here i am getting the id from my first vc that user clicked any category name :
override func viewDidLoad() {
super.viewDidLoad()
self.BTypeId = BTdata[0].BTIds
Allproductapicalling ()
}
func Allproductapicalling () {
let headers = [
"content-type": "application/json",
"cache-control": "no-cache",
"postman-token": "c98d0000-637b-1efc-8f93-f9e277ffefcd"
]
let parameters = [
"customerID": "1",
"listType": "1"
]
do {
let postData = try JSONSerialization.data(withJSONObject: parameters, options :[])
let request = NSMutableURLRequest(url: NSURL(string: "http://exp.php")! as URL,
cachePolicy: .useProtocolCachePolicy,timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
if (error != nil) {
///print(error)
} else {
DispatchQueue.main.async(execute: {
if let json = (try? JSONSerialization.jsonObject(with: data!, options: [])) as? Dictionary<String,AnyObject>
{
let status = json["status"] as? Int;
if(status == 1)
{
print("SUCCESS....")
if let typeValues = json["products"] as? [NSDictionary]
{
DispatchQueue.main.async(execute: {
print("INSIDE CATEGORIES")
for item in typeValues {
let bId = item.value(forKey: "categoryID") as! String
if(bId == self.BTypeId) {
self.Productdata.append(ProductData(json:item))
}
}
})
//print("Product Name : ", self.Productdata[0].proName)
}
}
}
})
}
})
dataTask.resume()
} catch {
// print("JSON serialization failed: \(error)")
}
}
My problem is in this line from above api calling code :
if let typeValues = json["products"] as? [NSDictionary]
{
DispatchQueue.main.async(execute: {
for item in typeValues {
let bId = item.value(forKey: "categoryID") as! String
if(bId == self.BTypeId) {
self.Productdata.append(ProductData(json:item))
}
}
})
i am getting the selected category id from my first VC, and i am comparing with the all product api calling category id. And i need to display that particular product alone.How to do that ??
if(bId == self.BTypeId)
Please help me out.
Thanks
DispatchQueue.main.async(execute: {
for item in typeValues {
let bId = item.value(forKey: "categoryID") as! String
if(bId as? String == self.BTypeId) {
print("Hurray sathish......")
self.Productdata.append(ProductData(json:item))
// print(self.Productdata.append(bId))
}
}
self.Collectionview.delegate = self
self.Collectionview.dataSource = self
self.Collectionview.reloadData()
})
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! DetailCollectionviewcell
cell.DetailProductName.text = Productdata[indexPath.row].proDescription
let imgURL: URL = URL(string: Productdata[indexPath.row].proImage!)!
let request: URLRequest = URLRequest(url: imgURL)
let session = URLSession.shared
let task = session.dataTask(with: request, completionHandler: {
(data, response, error) -> Void in
if (error == nil && data != nil)
{
func display_image()
{
cell.DetailImage.image = UIImage(data:data!)
}
DispatchQueue.main.sync(execute: display_image)
}
})
task.resume()
return cell
}
Your Output :
Your problem solve approve answer and give up vote thank you.
Happy Coding.

Make REST API call in Swift

I'm trying to use Swift to make a GET call to a REST API, and have tried to follow numerous tutorials, but can't figure it out. Either because I cannot figure out how to translate all the Obj-C to Swift, or because half of the methods n' such are deprecated. Does anyone know how to make the call, and parse returned JSON data?
Swift 5 & 4
let params = ["username":"john", "password":"123456"] as Dictionary<String, String>
var request = URLRequest(url: URL(string: "http://localhost:8080/api/1/login")!)
request.httpMethod = "POST"
request.httpBody = try? JSONSerialization.data(withJSONObject: params, options: [])
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
let session = URLSession.shared
let task = session.dataTask(with: request, completionHandler: { data, response, error -> Void in
print(response!)
do {
let json = try JSONSerialization.jsonObject(with: data!) as! Dictionary<String, AnyObject>
print(json)
} catch {
print("error")
}
})
task.resume()
You can do like this :
var url : String = "http://google.com?test=toto&test2=titi"
var request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: url)
request.HTTPMethod = "GET"
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue(), completionHandler:{ (response:NSURLResponse!, data: NSData!, error: NSError!) -> Void in
var error: AutoreleasingUnsafeMutablePointer<NSError?> = nil
let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary
if (jsonResult != nil) {
// process jsonResult
} else {
// couldn't load JSON, look at error
}
})
EDIT : For people have problem with this maybe your JSON stream is an
array [] and not an object {} so you have to change jsonResult to
NSArray instead of NSDictionary
I think the NSURLSession api fits better in this situation. Because if you write swift code your project target is at least iOS 7 and iOS 7 supports NSURLSession api. Anyway here is the code
let url = "YOUR_URL"
NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: url)) { data, response, error in
// Handle result
}.resume()
Here is the complete code for REST API requests using NSURLSession in swift
For GET Request
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let urlString = NSString(format: "your URL here")
print("get wallet balance url string is \(urlString)")
//let url = NSURL(string: urlString as String)
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%#", urlString) as String)
request.HTTPMethod = "GET"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let dataTask = session.dataTaskWithRequest(request) {
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
print("response is \(response)")
do {
let getResponse = try NSJSONSerialization.JSONObjectWithData(receivedData, options: .AllowFragments)
EZLoadingActivity .hide()
// }
} catch {
print("error serializing JSON: \(error)")
}
break
case 400:
break
default:
print("wallet GET request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
For POST request ...
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let params = ["username":bindings .objectForKey("username"), "provider":"walkingcoin", "securityQuestion":securityQuestionField.text!, "securityAnswer":securityAnswerField.text!] as Dictionary<String, AnyObject>
let urlString = NSString(format: “your URL”);
print("url string is \(urlString)")
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%#", urlString)as String)
request.HTTPMethod = "POST"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(params, options: [])
let dataTask = session.dataTaskWithRequest(request)
{
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
if response == "SUCCESS"
{
}
default:
print("save profile POST request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
I hope it works.
edited for swift 2
let url = NSURL(string: "http://www.test.com")
let task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, error) in
print(NSString(data: data!, encoding: NSUTF8StringEncoding))
}
task.resume()
Swift 4 - GET request
var request = URLRequest(url: URL(string: "http://example.com/api/v1/example")!)
request.httpMethod = "GET"
URLSession.shared.dataTask(with: request, completionHandler: { data, response, error -> Void in
do {
let jsonDecoder = JSONDecoder()
let responseModel = try jsonDecoder.decode(CustomDtoClass.self, from: data!)
print(responseModel)
} catch {
print("JSON Serialization error")
}
}).resume()
Don't forget to configure App Transport Security Settings to add your domain to the exceptions and allow insecure http requests if you're hitting endpoints without using HTTPS.
You can use a tool like http://www.json4swift.com/ to autogenerate your Codeable Mappings from your JSON responses.
In swift 3.3 and 4. I crated APIManager class with two public methods. Just pass required parameter, api name and request type. You will get response then pass it to the closure.
import UIKit
struct RequestType {
static let POST = "POST"
static let GET = "GET"
}
enum HtttpType: String {
case POST = "POST"
case GET = "GET"
}
class APIManager: NSObject {
static let sharedInstance: APIManager = {
let instance = APIManager()
return instance
}()
private init() {}
// First Method
public func requestApiWithDictParam(dictParam: Dictionary<String,Any>, apiName: String,requestType: String, isAddCookie: Bool, completionHendler:#escaping (_ response:Dictionary<String,AnyObject>?, _ error: NSError?, _ success: Bool)-> Void) {
var apiUrl = “” // Your api url
apiUrl = apiUrl.appendingFormat("%#", apiName)
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
let url = URL(string: apiUrl)!
let HTTPHeaderField_ContentType = "Content-Type"
let ContentType_ApplicationJson = "application/json"
var request = URLRequest.init(url: url)
request.timeoutInterval = 60.0
request.cachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
request.addValue(ContentType_ApplicationJson, forHTTPHeaderField: HTTPHeaderField_ContentType)
request.httpMethod = requestType
print(apiUrl)
print(dictParam)
let dataTask = session.dataTask(with: request) { (data, response, error) in
if error != nil {
completionHendler(nil, error as NSError?, false)
} do {
let resultJson = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]
print("Request API = ", apiUrl)
print("API Response = ",resultJson ?? "")
completionHendler(resultJson, nil, true)
} catch {
completionHendler(nil, error as NSError?, false)
}
}
dataTask.resume()
}
// Second Method
public func requestApiWithUrlString(param: String, apiName: String,requestType: String, isAddCookie: Bool, completionHendler:#escaping (_ response:Dictionary<String,AnyObject>?, _ error: NSError?, _ success: Bool)-> Void ) {
var apiUrl = "" // Your api url
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
var request: URLRequest?
if requestType == "GET" {
apiUrl = String(format: "%#%#&%#", YourAppBaseUrl,apiName,param)
apiUrl = apiUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
print("URL=",apiUrl)
let url = URL(string: apiUrl)!
request = URLRequest.init(url: url)
request?.httpMethod = "GET"
} else {
apiUrl = String(format: "%#%#", YourAppBaseUrl,apiName)
apiUrl = apiUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
print("URL=",apiUrl)
let bodyParameterData = param.data(using: .utf8)
let url = URL(string: apiUrl)!
request = URLRequest(url: url)
request?.httpBody = bodyParameterData
request?.httpMethod = "POST"
}
request?.timeoutInterval = 60.0
request?.cachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
request?.httpShouldHandleCookies = true
let dataTask = session.dataTask(with: request!) { (data, response, error) in
if error != nil {
completionHendler(nil, error as NSError?, false)
} do {
if data != nil {
let resultJson = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]
print("Request API = ", apiUrl)
print("API Response = ",resultJson ?? "")
completionHendler(resultJson, nil, true)
} else {
completionHendler(nil, error as NSError?, false)
}
} catch {
completionHendler(nil, error as NSError?, false)
}
}
dataTask.resume()
}
}
// Here is example of calling Post API from any class
let bodyParameters = String(format: "appid=%#&appversion=%#","1","1")
APIManager.sharedInstance.requestApiWithUrlString(param: bodyParameters, apiName: "PASS_API_NAME", requestType: HtttpType.POST.rawValue, isAddCookie: false) { (dictResponse, error, success) in
if success {
if let dictMessage = dictResponse?["message"] as? Dictionary<String, AnyObject> {
// do you work
}
} else {
print("Something went wrong...")
}
}
}
/// Or just use simple function
func dataRequest() {
let urlToRequest = "" // Your API url
let url = URL(string: urlToRequest)!
let session4 = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
let paramString = "data=Hello"
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session4.dataTask(with: request as URLRequest) { (data, response, error) in
guard let _: Data = data, let _: URLResponse = response, error == nil else {
print("*****error")
return
}
if let dataString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue) {
print("****Data: \(dataString)") //JSONSerialization
}
}
task.resume()
}
Swift 3.0
let request = NSMutableURLRequest(url: NSURL(string: "http://httpstat.us/200")! as URL)
let session = URLSession.shared
request.httpMethod = "GET"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = session.dataTask(with: request as URLRequest, completionHandler: {data, response, error -> Void in
if error != nil {
print("Error: \(String(describing: error))")
} else {
print("Response: \(String(describing: response))")
}
})
task.resume()
Swift 4
Create an app using Alamofire with Api Post method
Install pod file -pod 'Alamofire', '~> 4.0' for Swift 3 with Xcode 9
Create Webservices.swift class, import Alamofire
Design storyBoard ,Login View
insert following Code for the ViewControllerClass
import UIKit
class ViewController: UIViewController {
#IBOutlet var usernameTextField: UITextField!
#IBOutlet var passwordTextField: UITextField!
var usertypeStr :String = "-----------"
var loginDictionary : NSDictionary?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func loginButtonClicked(_ sender: Any) {
WebServices.userLogin(userName: usernameTextField.text!, password: passwordTextField.text!,userType: usertypeStr) {(result, message, status )in
if status {
let loginDetails = result as? WebServices
self.loginDictionary = loginDetails?.loginData
if self.loginDictionary?["status"] as? String == "error"
{
self.alertMessage(alerttitle: "Login Error", (self.loginDictionary?["message"] as? String)!)
} else if self.loginDictionary?["status"] as? String == "ok" {
self.alertMessage(alerttitle: "", "Success")
}else {
self.alertMessage(alerttitle: "", (self.loginDictionary?["message"] as? String)!)
}
} else {
self.alertMessage(alerttitle: "", "Sorry")
}
}
}
func alertMessage(alerttitle:String,_ message : String){
let alertViewController = UIAlertController(title:alerttitle, message:message, preferredStyle: .alert)
alertViewController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertViewController, animated: true, completion: nil)
}
}
Insert Following Code For WebserviceClass
import Foundation
import Alamofire
class WebServices: NSObject {
enum WebServiceNames: String {
case baseUrl = "https://---------------"
case UserLogin = "------------"
}
// MARK: - Login Variables
var loginData : NSDictionary?
class func userLogin(userName: String,password : String,userType : String, completion : #escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> ()) {
let url = WebServiceNames.baseUrl.rawValue + WebServiceNames.UserLogin.rawValue
let params = ["USER": userName,"PASS":password,"API_Key" : userType]
WebServices.postWebService(urlString: url, params: params as [String : AnyObject]) { (response, message, status) in
print(response ?? "Error")
let result = WebServices()
if let data = response as? NSDictionary {
print(data)
result.loginData = data
completion(result, "Success", true)
}else {
completion("" as AnyObject?, "Failed", false)
}
}
}
//MARK :- Post
class func postWebService(urlString: String, params: [String : AnyObject], completion : #escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void) {
alamofireFunction(urlString: urlString, method: .post, paramters: params) { (response, message, success) in
if response != nil {
completion(response as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
class func alamofireFunction(urlString : String, method : Alamofire.HTTPMethod, paramters : [String : AnyObject], completion : #escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void){
if method == Alamofire.HTTPMethod.post {
Alamofire.request(urlString, method: .post, parameters: paramters, encoding: URLEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
print(urlString)
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}else {
Alamofire.request(urlString).responseJSON { (response) in
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
}
//Mark:-Cancel
class func cancelAllRequests()
{
Alamofire.SessionManager.default.session.getTasksWithCompletionHandler { dataTasks, uploadTasks, downloadTasks in
dataTasks.forEach { $0.cancel() }
uploadTasks.forEach { $0.cancel() }
downloadTasks.forEach { $0.cancel() }
}
}
}
swift 4
USE ALAMOFIRE in our App plz install pod file
pod 'Alamofire', '~> 4.0'
We can Use API for Json Data -https://swapi.co/api/people/
Then We can create A networking class for Our project- networkingService.swift
import Foundation
import Alamofire
typealias JSON = [String:Any]
class networkingService{
static let shared = networkingService()
private init() {}
func getPeople(success successblock: #escaping (GetPeopleResponse) -> Void)
{
Alamofire.request("https://swapi.co/api/people/").responseJSON { response in
guard let json = response.result.value as? JSON else {return}
// print(json)
do {
let getPeopleResponse = try GetPeopleResponse(json: json)
successblock(getPeopleResponse)
}catch{}
}
}
func getHomeWorld(homeWorldLink:String,completion: #escaping(String) ->Void){
Alamofire.request(homeWorldLink).responseJSON {(response) in
guard let json = response.result.value as? JSON,
let name = json["name"] as? String
else{return}
completion(name)
}
}
}
Then Create NetworkingError.swift class
import Foundation
enum networkingError : Error{
case badNetworkigStuff
}
Then create Person.swift class
import Foundation
struct Person {
private let homeWorldLink : String
let birthyear : String
let gender : String
let haircolor : String
let eyecolor : String
let height : String
let mass : String
let name : String
let skincolor : String
init?(json : JSON) {
guard let birthyear = json["birth_year"] as? String,
let eyecolor = json["eye_color"] as? String,
let gender = json["gender"] as? String,
let haircolor = json["hair_color"] as? String,
let height = json["height"] as? String,
let homeWorldLink = json["homeworld"] as? String,
let mass = json["mass"] as? String,
let name = json["name"] as? String,
let skincolor = json["skin_color"] as? String
else { return nil }
self.homeWorldLink = homeWorldLink
self.birthyear = birthyear
self.gender = gender
self.haircolor = haircolor
self.eyecolor = eyecolor
self.height = height
self.mass = mass
self.name = name
self.skincolor = skincolor
}
func homeWorld(_ completion: #escaping (String) -> Void) {
networkingService.shared.getHomeWorld(homeWorldLink: homeWorldLink){ (homeWorld) in
completion(homeWorld)
}
}
}
Then create DetailVC.swift
import UIKit
class DetailVC: UIViewController {
var person :Person!
#IBOutlet var name: UILabel!
#IBOutlet var birthyear: UILabel!
#IBOutlet var homeworld: UILabel!
#IBOutlet var eyeColor: UILabel!
#IBOutlet var skinColor: UILabel!
#IBOutlet var gender: UILabel!
#IBOutlet var hairColor: UILabel!
#IBOutlet var mass: UILabel!
#IBOutlet var height: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
print(person)
name.text = person.name
birthyear.text = person.birthyear
eyeColor.text = person.eyecolor
gender.text = person.gender
hairColor.text = person.haircolor
mass.text = person.mass
height.text = person.height
skinColor.text = person.skincolor
person.homeWorld{(homeWorld) in
self.homeworld.text = homeWorld
}
}
}
Then Create GetPeopleResponse.swift class
import Foundation
struct GetPeopleResponse {
let people : [Person]
init(json :JSON) throws {
guard let results = json["results"] as? [JSON] else { throw networkingError.badNetworkigStuff}
let people = results.map{Person(json: $0)}.flatMap{ $0 }
self.people = people
}
}
Then Our View controller class
import UIKit
class ViewController: UIViewController {
#IBOutlet var tableVieww: UITableView!
var people = [Person]()
#IBAction func getAction(_ sender: Any)
{
print("GET")
networkingService.shared.getPeople{ response in
self.people = response.people
self.tableVieww.reloadData()
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
guard segue.identifier == "peopleToDetails",
let detailVC = segue.destination as? DetailVC,
let person = sender as AnyObject as? Person
else {return}
detailVC.person = person
}
}
extension ViewController:UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return people.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = people[indexPath.row].name
return cell
}
}
extension ViewController:UITableViewDelegate{
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "peopleToDetails", sender: people[indexPath.row])
}
}
In our StoryBoard
plz Connect with our View with another one using segue with identifier -peopleToDetails
Use UITableView In our First View
Use UIButton For get the Data
Use 9 Labels in our DetailVc
Very simple 100% working , tested
var url : String = "https://restcountries.eu/rest/v2/all"
URLSession.shared.dataTask(with: NSURL(string: url) as! URL) { data, response, error in
// Handle result
let response = String (data: data!, encoding: String.Encoding.utf8)
print("response is \(response)")
do {
let getResponse = try JSONSerialization.jsonObject(with: data!, options: .allowFragments)
print(getResponse)
let countryArray = getResponse as! NSArray
print(countryArray)
let country1 = countryArray[0] as! [String:Any]
let name = country1["name"] as! String
print(name)
} catch {
print("error serializing JSON: \(error)")
}
}.resume()
}
If you're working in Swift 3, the syntax changes. The example here worked for me and has a good explanation of the steps: https://grokswift.com/simple-rest-with-swift/
This is the code from that tutorial:
let todoEndpoint: String = "https://jsonplaceholder.typicode.com/todos/1"
guard let url = URL(string: todoEndpoint) else {
print("Error: cannot create URL")
return
}
let urlRequest = URLRequest(url: url)
let task = session.dataTask(with: urlRequest) {
(data, response, error) in
// check for any errors
guard error == nil else {
print("error calling GET on /todos/1")
print(error!)
return
}
// make sure we got data
guard let responseData = data else {
print("Error: did not receive data")
return
}
// parse the result as JSON, since that's what the API provides
do {
guard let todo = try JSONSerialization.jsonObject(with: responseData, options: [])
as? [String: Any] else {
print("error trying to convert data to JSON")
return
}
// now we have the todo
// let's just print it to prove we can access it
print("The todo is: " + todo.description)
// the todo object is a dictionary
// so we just access the title using the "title" key
// so check for a title and print it if we have one
guard let todoTitle = todo["title"] as? String else {
print("Could not get todo title from JSON")
return
}
print("The title is: " + todoTitle)
} catch {
print("error trying to convert data to JSON")
return
}
}
task.resume()
Swift 5
API call method
//Send Request with ResultType<Success, Error>
func fetch(requestURL:URL,requestType:String,parameter:[String:AnyObject]?,completion:#escaping (Result<Any>) -> () ){
//Check internet connection as per your convenience
//Check URL whitespace validation as per your convenience
//Show Hud
var urlRequest = URLRequest.init(url: requestURL)
urlRequest.cachePolicy = .reloadIgnoringLocalCacheData
urlRequest.timeoutInterval = 60
urlRequest.httpMethod = String(describing: requestType)
urlRequest.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
urlRequest.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Accept")
//Post URL parameters set as URL body
if let params = parameter{
do{
let parameterData = try JSONSerialization.data(withJSONObject:params, options:.prettyPrinted)
urlRequest.httpBody = parameterData
}catch{
//Hide hude and return error
completion(.failure(error))
}
}
//URL Task to get data
URLSession.shared.dataTask(with: requestURL) { (data, response, error) in
//Hide Hud
//fail completion for Error
if let objError = error{
completion(.failure(objError))
}
//Validate for blank data and URL response status code
if let objData = data,let objURLResponse = response as? HTTPURLResponse{
//We have data validate for JSON and convert in JSON
do{
let objResposeJSON = try JSONSerialization.jsonObject(with: objData, options: .mutableContainers)
//Check for valid status code 200 else fail with error
if objURLResponse.statusCode == 200{
completion(.success(objResposeJSON))
}
}catch{
completion(.failure(error))
}
}
}.resume()
}
Use of API call method
func useOfAPIRequest(){
if let baseGETURL = URL(string:"https://postman-echo.com/get?foo1=bar1&foo2=bar2"){
self.fetch(requestURL: baseGETURL, requestType: "GET", parameter: nil) { (result) in
switch result{
case .success(let response) :
print("Hello World \(response)")
case .failure(let error) :
print("Hello World \(error)")
}
}
}
}
Api Call using Model Class
let urlString = "http://--.154.--.78/------/index.php?route=api/coupon/all"
let url = URL(string: urlString)
var request = URLRequest(url: url!)
request.httpMethod = "GET"
URLSession.shared.dataTask(with:request) { (data, response, error) in
if error != nil {
print(error)
} else {
do {
let parsedDictionaryArray = try JSONSerialization.jsonObject(with: data!) as! [String:AnyObject]
print(parsedDictionaryArray)
if let arry = parsedDictionaryArray["data"] as? [[String:AnyObject]] {
for dic in arry {
let name = dic["name"]
let descriptionData = dic["description"]
self.modelReference.append(model(name: name as! String, descriptionStr: descriptionData as! String))
print(name!)
}
}
} catch let error as NSError {
print(error)
}
}
}.resume()
create a variable and connect with model class
var modelReference = [model]()
create a model class New -> swift class
import Foundation
class model : NSObject{
var name : String
var descriptionStr: String
init(name : String, descriptionStr: String)
{
self.name = name
self.descriptionStr = descriptionStr
}
}
then we can connect with our table view objects
let cell = tableView.dequeueReusableCell(withIdentifier: "TableViewCellID")as! TableViewCell
cell.listName.text = modelReference[indexPath.row].name
let headers = [
"cache-control": "no-cache",
"postman-token": "6f8a-12c6-87a1-ac0f25d6385a"
]
let request = NSMutableURLRequest(url: NSURL(string: "Your url string")! as URL,
cachePolicy: .useProtocolCachePolicy,
timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
if error == nil && data != nil {
do {
// Convert NSData to Dictionary where keys are of type String, and values are of any type
let json = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as! [String:AnyObject]
print(json)
//do your stuff
// completionHandler(true)
} catch {
// completionHandler(false)
}
}
else if error != nil
{
//completionHandler(false)
}
}).resume()
}
func getAPICalling(mainUrl:String) {
//create URL
guard let url = URL(string: mainUrl) else {
print("Error: cannot create URL")
return
}
//create request
let urlRequest = URLRequest(url: url)
// create the session
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
// make the request
let task = session.dataTask(with: urlRequest) {
(data, response, error) in
// check for any errors
guard error == nil else {
print("error calling GET")
print(error!.localizedDescription)
return
}
// make sure we got data
guard let responseData = data else {
print("error: did not receive data")
return
}
// convert Data in JSON && parse the result as JSON, since that's what the API provides
do {
guard let object = try JSONSerialization.jsonObject(with: responseData, options: [])
as? [String: Any] else {
print("error trying to convert data to JSON")
return
}
//JSON Response
guard let todoTitle = object["response"] as? NSDictionary else {
print("Could not get todo title from JSON")
return
}
//Get array in response
let responseList = todoTitle.value(forKey: "radioList") as! NSArray
for item in responseList {
let dic = item as! NSDictionary
let str = dic.value(forKey: "radio_des") as! String
self.arrName.append(str)
print(item)
}
DispatchQueue.main.async {
self.tblView.reloadData()
}
} catch {
print("error trying to convert data to JSON")
return
}
}
task.resume()
}
Usage:
getAPICalling(mainUrl:"https://dousic.com/api/radiolist?user_id=16")
class ApiManager: NSObject {
static func callGetDataApi(url: String,completion: #escaping([[String: Any]])-> Void) {
guard let url = URL(string: ApiName.baseUrl+url ) else { return }
var request = URLRequest(url: url)
request.httpMethod = "GET"
URLSession.shared.dataTask(with:request) { (data, response, error) in
if error != nil {
print(error ?? "")
} else {
do {
let arry = try JSONSerialization.jsonObject(with: data!) as! [[String:AnyObject]]
print(arry)
DispatchQueue.main.async {
completion(arry)
}
} catch let error as NSError {
print(error)
}
}
}.resume()
}
}

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