I am trying to parse a JSON and get the parameter value of "Name". And I want to display the names of postal code areas in a label in table view cell.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ourCell") as! ourTableViewCell
let temp = pinCodeData!["Post Office"][indexPath.row][0].dictionaryObject as! Dictionary<String,String>
let temp2 = temp["Name"]
print(temp)
cell.ourLabel.text = temp2
return cell
}
let apiURL = "http://www.postalpincode.in/api/pincode/122001"
func ret(){
Alamofire.request(apiURL, method: .get).responseJSON { (response) in
DispatchQueue.main.async {
if response.result.isSuccess {
self.pinCodeData = JSON(response.result.value!)
self.outTableView.reloadData()
}
}
}
}
Related
I can't figure out why the cells don't return with data.
I can parse normally using the Decodable, which means that is working.
I've been trying all the methods I find without success.
struct MuscleGroup: Decodable {
let ExcerciseID: String
let description: String
let excerciseName: String
let muscleGroup: String
}
class ExerciseListViewController: UITableViewController {
var muscleGroup = [MuscleGroup]()
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return muscleGroup.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ExerciseList", for: indexPath) as! ExcerciseList
let muscle = muscleGroup[indexPath.row]
cell.textLabel!.text = muscle.excerciseName
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print(self.muscleGroup[indexPath.row])
tableView.deselectRow(at: indexPath, animated: true)
}
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.dataSource = self
self.tableView.delegate = self
getJson()
}
func getJson(){
guard let url = URL(string: "https://jsonurl") else { return }
let session = URLSession.shared
session.dataTask(with: url) { (data, response, error) in
if let response = response {
print(response)
}
if let data = data {
print(data)
do {
let muscles = try JSONDecoder().decode([MuscleGroup].self, from: data)
for muscle in muscles {
let muscleGroup = muscle.excerciseName
print(muscleGroup)
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
} catch {
print(error)
}
}
}.resume()
}
If I change the var muscleGroup = String to ["Chest", "Back", "Abdominals","Arms", "Legs"] it returns correctly.
Also, the print result on the console returns all the data that needs to be on the Table View.
What am I doing wrong?
As you probably want to use the entire struct
Replace
var muscleGroup = [String]()
with
var muscleGroups = [MuscleGroup]()
Replace
let muscles = try JSONDecoder().decode([MuscleGroup].self, from: data)
for muscle in muscles {
let muscleGroup = muscle.excerciseName
print(muscleGroup)
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
with
self.muscleGroups = try JSONDecoder().decode([MuscleGroup].self, from: data)
DispatchQueue.main.async {
self.tableView.reloadData()
}
Replace
cell.textLabel?.text = self.muscleGroup[indexPath.row]
with
cell.textLabel?.text = self.muscleGroups[indexPath.row].muscleGroup
In your getJson function this line
let muscleGroup = muscle.excerciseName
is creating a new local variable called muscleGroup, change the line to be
self.muscleGroup.append(muscle.excerciseName)
i.e. get rid of the let and append the value to the main array variable
Also move the
DispatchQueue.main.async {
self.tableView.reloadData()
}
to be outside of the for loop of muscles as you are forcing the table to reload for each entry rather than when you are finished
I am using UITableViewController to display a list of items from a web service and these items have images and I using AlamofireImage to get the data from image and display them in UITableViewCell like so:
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "postsCell", for: indexPath) as! PostsCell
let imgUrl = URL(string:"http://example.com/uploads/" + (self.array[indexPath.row]["cover"] as! String))
cell.delegate = self
Alamofire.request(imgUrl!).responseImage { response in
DispatchQueue.main.async {
if let image = response.result.value {
cell.message?.text = (self.array[indexPath.row]["title"] as! String)
cell.subMessage?.text = (self.array[indexPath.row]["username"] as! String)
cell.profileImage?.image = image
}
}
}
return cell
}
and here is how I am populating self.array
getPosts(username: self.username!) { result in
self.array = result
self.tableView.reloadData()
}
Here is getPosts:
func getPosts(username: String, completionHandler:#escaping (_ result:Array<Dictionary<String, Any>>) -> Void)
{
var returnedResults = Array<Dictionary<String, Any>>()
APIController().getUsersPosts(username: username)
{
(result: Array<Dictionary<String, Any>>) in
DispatchQueue.main.async {
//Return our results
returnedResults = result
completionHandler(returnedResults)
}
}
}
and here is my call to my api
func getPosts(username: String, completion: #escaping (_ result: Array<Dictionary<String, Any>>) -> Void)
{
let parameters: Parameters = [
"username": username
]
Alamofire.request(webservice + "?action=posts", method: HTTPMethod.post, parameters: parameters, encoding: URLEncoding.httpBody, headers: [:]).responseJSON { response in
if(response.error == nil)
{
if let result = response.result.value {
let jsonData = result as! Array<Dictionary<String, Any>>
completion(jsonData)
}
}
}
}
My question is, is there a better and more efficient way of displaying images from a URL?
You can use SDWebImage which maintains cache of images for your app,
You can use it in following manner:
import SDWebImage
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "postsCell", for: indexPath) as! PostsCell
let imgUrl = URL(string:"http://example.com/uploads/" + (self.array[indexPath.row]["cover"] as! String))
cell.profileImage.sd_setImage(with: imgUrl, placeholderImage: UIImage(named: "placeholder.png"))
// REST OF YOUR CODE TO FILL OTHE DATA OF YOUR CELL
return cell
}
You can refer below git link for more information:
https://github.com/rs/SDWebImage
No need to write responseImage completionHandler you can do something like below:
cell.profileImage?.af_setImage(withURL: imgUrl)
I want to show data in table cells
now I want show data from api to table cell view on the screen
The output of this api link which is showing in console:
this is struct variable
struct Team: Codable{ //here is struct veriables
var api_id: Int
var id: Int
var first_team:Int
var second_team:Int
var date: String }
here is Im getting data from api
guard let url = URL(string: "http://127.0.0.1:8000/api/matches") else {return}
let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
guard let dataResponse = data,
error == nil else {
print(error?.localizedDescription ?? "Response Error")
return }
do {
//here dataResponse received from a network request
let decoder = JSONDecoder()
let model = try decoder.decode([Team].self, from:
dataResponse) //Decode JSON Response Data
print(model)
} catch let parsingError {
print("Error", parsingError)
}
}
task.resume()
here is want to use data and show on screen
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TeamCell", for: indexPath) as! TeamTableViewCell
//I want to show here data
return cell
}
Create a global variable for storing teams
var teams = [Team]()
Replace
let model = try decoder.decode([Team].self, from:
dataResponse) //Decode JSON Response Data
with
teams = try decoder.decode([Team].self, from:
dataResponse) //Decode JSON Response Data
tableView.reloadData()
And then,
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return teams.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TeamCell", for:
indexPath) as! TeamTableViewCell
if let team = teams[indexPath.row] {
cell.firstTeamLabel.text = "\(team.first_team)"
cell.dateLabel.text = team.date
...
// Note: Replace label names with your actual one.
}
return cell
}
So I am trying to add some data returned from a function and I can only access that data from inside that function so I ended up putting the table inside the function but after I did so I received the error above.
Any ideas?
This is my code:
import Foundation
import UIKit
class UserAccView: UIViewController , UITableViewDataSource {
#IBAction func GetUserInfo(_ sender: UIButton) {
guard let url = URL(string: "https://goollyapp.azurewebsites.net/api/v0.1/Goolly/User/218910182109") else{return}
let session = URLSession.shared
session.dataTask(with: url) { (data, response, error) in
if let response = response {
print (response)
}
if let data = data {
let json = try? JSONSerialization.jsonObject(with: data, options: [])
guard let data_array = json as? NSArray else
{
return
}
for i in 0 ..< data_array.count
{
if let data_object = data_array[i] as? NSDictionary
{
if let Body = data_object["id"] as? String,
let InfoId = data_object["TransDate"] as? String,
let Title = data_object["Debt"] as? String,
let UserId = data_object["Crdit"] as? String,
let InfoType = data_object["Desc"] as? String
{}
}
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return (data?.count)!
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell = UITableViewCell()
cell.textLabel?.text = "cells"
return cell
}
}.resume()
}
}
Why you have added the dataSource methods inside your Api Call ? Write those methods outside of your GetUserInfo IBAction.
Secondly, now you want to reload the tableview. For that create IBOutlet for tableview first and when response comes from the api you can reload the tableview after filling the response in your data array.
Lastly don't use var cell = UITableViewCell() like this in cellForRowAt. It will freeze your tableview . Use it like this
let cell = tableView.dequeueReusableCellWithIdentifier("CellIdentifier", forIndexPath: indexPath) as UITableViewCell.
Hope it helps you
I've been trying to return string urls from JSON and store it in array and then show the array in UITableView. but it shows empty UILabel.
class PhotosTableViewController: UITableViewController {
let imageLoadURL = "https://..."
var TAG_IMG_URL = []
verride func viewDidLoad() {
super.viewDidLoad()
getLatestPhotos()
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return TAG_IMG_URL.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! KivaLoanTableViewCell
cell.nameLabel.text = TAG_IMG_URL[indexPath.row] as? String
return cell
}
func getLatestPhotos() {
let request = NSURLRequest(URL: NSURL(string: imageLoadURL)!)
let urlSession = NSURLSession.sharedSession()
let task = urlSession.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in
if error != nil {
println(error.localizedDescription)
}
self.TAG_IMG_URL = self.parseJsonData(data)
println("\(self.TAG_IMG_URL.count)")
dispatch_async(dispatch_get_main_queue(), {
self.tableView.reloadData()
})
})
task.resume()
}
func parseJsonData(data: NSData) -> NSArray {
var error:NSError?
let jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &error) as? NSDictionary
if error != nil {
println(error?.localizedDescription)
}
if let j = jsonResult, let mediaObjects = j.valueForKeyPath("feed.entry.media$group.media$content") as? NSArray {
if let imageUrls: AnyObject = mediaObjects.valueForKey("url") {
TAG_IMG_URL = imageUrls as! NSArray
}
}
println("\(TAG_IMG_URL)")
self.alert.dismissWithClickedButtonIndex(0, animated: true)
return TAG_IMG_URL
}
}
During parseJsonData it returns the urls which it look like (below), but when i try to show it in the UITableView it always becomes empty UILabel so what am i doing wrong here ?:
(
(
"https://..."
),
(
"https://..."
)
)
Note : in numberOfRowsInSection it returns the right amount which its 2 urls.
Try this:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! KivaLoanTableViewCell
cell.nameLabel.text = TAG_IMG_URL[indexPath.row][0] as? String
return cell
}
The problem that you have 2-dimensional array, so you should get first object in object:
TAG_IMG_URL[indexPath.row].firstObject or TAG_IMG_URL[indexPath.row][0].