How would I make this same API request through codables?
In my app, this function is repeated in every view that makes API calls.
func getOrders() {
DispatchQueue.main.async {
let spinningHUD = MBProgressHUD.showAdded(to: self.view, animated: true)
spinningHUD.isUserInteractionEnabled = false
let returnAccessToken: String? = UserDefaults.standard.object(forKey: "accessToken") as? String
let access = returnAccessToken!
let headers = [
"postman-token": "dded3e97-77a5-5632-93b7-dec77d26ba99",
"Authorization": "JWT \(access)"
]
let request = NSMutableURLRequest(url: NSURL(string: "https://somelink.com")! 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) {
print(error!)
} else {
if let dataNew = data, let responseString = String(data: dataNew, encoding: .utf8) {
print("----- Orders -----")
print(responseString)
print("----------")
let dict = self.convertToDictionary(text: responseString)
print(dict?["results"] as Any)
guard let results = dict?["results"] as? NSArray else { return }
self.responseArray = (results) as! [HomeVCDataSource.JSONDictionary]
DispatchQueue.main.async {
spinningHUD.hide(animated: true)
self.tableView.reloadData()
}
}
}
})
dataTask.resume()
}
}
I would suggest to do the following
Create Base Service as below
import UIKit
import Foundation
enum MethodType: String {
case get = "GET"
case post = "POST"
case put = "PUT"
case patch = "PATCH"
case delete = "DELETE"
}
class BaseService {
var session: URLSession!
// MARK: Rebuilt Methods
func FireGenericRequest<ResponseModel: Codable>(url: String, methodType: MethodType, headers: [String: String]?, completion: #escaping ((ResponseModel?) -> Void)) {
UIApplication.shared.isNetworkActivityIndicatorVisible = true
// Request Preparation
guard let serviceUrl = URL(string: url) else {
print("Error Building URL Object")
return
}
var request = URLRequest(url: serviceUrl)
request.httpMethod = methodType.rawValue
// Header Preparation
if let header = headers {
for (key, value) in header {
request.setValue(value, forHTTPHeaderField: key)
}
}
// Firing the request
session = URLSession(configuration: URLSessionConfiguration.default)
session.dataTask(with: request) { (data, response, error) in
DispatchQueue.main.async {
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
if let data = data {
do {
guard let object = try? JSONDecoder().decode(ResponseModel.self , from: data) else {
print("Error Decoding Response Model Object")
return
}
DispatchQueue.main.async {
completion(object)
}
}
}
}.resume()
}
private func buildGenericParameterFrom<RequestModel: Codable>(model: RequestModel?) -> [String : AnyObject]? {
var object: [String : AnyObject] = [String : AnyObject]()
do {
if let dataFromObject = try? JSONEncoder().encode(model) {
object = try JSONSerialization.jsonObject(with: dataFromObject, options: []) as! [String : AnyObject]
}
} catch (let error) {
print("\nError Encoding Parameter Model Object \n \(error.localizedDescription)\n")
}
return object
}
}
the above class you may reuse it in different scenarios adding request object to it and passing any class you would like as long as you are conforming to Coddle protocol
Create Model Conforming to Coddle protocol
class ExampleModel: Codable {
var commentId : String?
var content : String?
//if your JSON keys are different than your property name
enum CodingKeys: String, CodingKey {
case commentId = "CommentId"
case content = "Content"
}
}
Create Service to the specific model with the endpoint constants subclassing to BaseService as below
class ExampleModelService: BaseService<ExampleModel/* or [ExampleModel]*/> {
func GetExampleModelList(completion: ((ExampleModel?)/* or [ExampleModel]*/ -> Void)?) {
super.FireRequestWithURLSession(url: /* url here */, methodType: /* method type here */, headers: /* headers here */) { (responseModel) in
completion?(responseModel)
}
}
}
Usage
class MyLocationsController: UIViewController {
// MARK: Properties
// better to have in base class for the controller
var exampleModelService: ExampleModelService = ExampleModelService()
// MARK: Life Cycle Methods
override func viewDidLoad() {
super.viewDidLoad()
exampleModelService.GetExampleModelList(completion: { [weak self] (response) in
// model available here
})
}
}
Basically, you need to conform Codable protocol in your model classes, for this you need to implement 2 methods, one for code your model and another for decode your model from JSON
func encode(to encoder: Encoder) throws
required convenience init(from decoder: Decoder) throws
After that you will be able to use JSONDecoder class provided by apple to decode your JSON, and return an array (if were the case) or an object of your model class.
class ExampleModel: Codable {
var commentId : String?
var content : String?
//if your JSON keys are different than your property name
enum CodingKeys: String, CodingKey {
case commentId = "CommentId"
case content = "Content"
}
}
Then using JSONDecoder you can get your model array like this
do {
var arrayOfOrders : [ExampleModel] = try JSONDecoder().decode([ExampleModel].self, from: dataNew)
}
catch {
}
First of all, I can recommend you to use this application -quicktype- for turning json file to class or struct (codable) whatever you want. enter link description here.
After that you can create a generic function to get any kind of codable class and return that as a response.
func taskHandler<T:Codable>(type: T.Type, useCache: Bool, urlRequest: URLRequest, completion: #escaping (Result<T, Error>) -> Void) {
let task = URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in
if let error = error {
print("error : \(error)")
}
if let data = data {
do {
let dataDecoded = try JSONDecoder().decode(T.self, from: data)
completion(.success(dataDecoded))
// if says use cache, let's store response data to cache
if useCache {
if let response = response as? HTTPURLResponse {
self.storeDataToCache(urlResponse: response, urlRequest: urlRequest, data: data)
}
}
} catch let error {
completion(.failure(error))
}
} else {
completion(.failure(SomeError))
}
}
task.resume()
}
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()
}
}