I try to parse JSON with mvc pattern.I'm trying for the first time. But I'm getting "Escaping closure captures mutating 'self' parameter error " I mutated functions and put self where necessary.I can access and use required protocols in ViewController. Everything seems normal What's the problem here ?
import Foundation
protocol ItunesManagerDelegate {
func didUpdateSearchin(_ ItunesManager:ItunesManager, product: [ItunesModel])
func didFailWithError(error:Error)
}
struct ItunesManager {
let baseURL = "https://itunes.apple.com/search?term="
var delegate : ItunesManagerDelegate?
var itunesDataArray = [ItunesModel]()
mutating func getSearchResult(for terms:String){
let urlString = "\(baseURL)\(terms)"
if let url = URL(string: urlString) {
let session = URLSession(configuration: .default)
let task = session.dataTask(with: url) { (data, response, error) in
if error != nil {
self.delegate?.didFailWithError(error: error!)
return
}
if let searchResult = self.parseJSON(data!){
self.delegate?.didUpdateSearchin(ItunesManager(), product: searchResult)
}
}
task.resume()
}
}
mutating func parseJSON(_ itunesData:Data) -> [ItunesModel]? {
let decoder = JSONDecoder()
do {
let decodedData = try decoder.decode([ItunesData].self, from: itunesData)
decodedData.forEach { (ItunesData) in
ItunesData.results.forEach { (SearchResults) in
let type = SearchResults.wrapperType
let name = SearchResults.collectionName
let url = SearchResults.artworkUrl100
let price = SearchResults.collectionPrice
let date = SearchResults.releaseDate
let itunesProductInfo = ItunesModel(collectionName: name, collectionPrice: price, artWorkUrl100: url, wrapperType: type, releaseDate: date)
itunesDataArray.append(itunesProductInfo)
}
}
return itunesDataArray
}catch{
delegate?.didFailWithError(error: error)
return nil
}
}
}
Related
I would like to return the var points from my method getAllPoints()
struct tempPoint: Decodable {
let idPoint:Int
let ptName:String
let ptLat:Double
let ptLong:Double
}
func getAllPoints(){
if let url = URL(string: "[MyWebService.com]") {
URLSession.shared.dataTask(with: url) { data, response, error in
if let data = data {
if let jsonString = String(data: data, encoding: .utf8) {
let jsonData = Data(jsonString.utf8)
do {
let points = try JSONDecoder().decode([tempPoint].self, from: jsonData)
} catch let error {
print(error)
}
print(jsonString)
}
}
}.resume()
}
}
Results that I got when I do print(points)
[
{"idPoint":6,"ptName":"Maison","ptLat":43.72623997050257,"ptLong":2.202591651830584},
{"idPoint":7,"ptName":"Wheelin","ptLat":42.75754326128173,"ptLong":8.137330631668685},
{"idPoint":8,"ptName":"Animoz","ptLat":45.76321863196126,"ptLong":7.137186047202841},
{"idPoint":9,"ptName":"Hesias","ptLat":45.767222865412144,"ptLong":6.132352002277385},
{"idPoint":10,"ptName":"Marcombes","ptLat":45.76018235160473,"ptLong":4.085466264251463},
{"idPoint":11,"ptName":"Leclan","ptLat":48.80950120948317,"ptLong":2.110623123039061},
{"idPoint":12,"ptName":"Cournon Skatepark","ptLat":39.74138613175866,"ptLong":4.2154977334348906}
]
I wonder if this is possible to return these at the end of my method.
I'm gonna use it in a pickerView and to do a CRUD that's why I would like to store them.
Thank You
use completion closure to "return" your points.
Try something like this:
func getAllPoints(completion: #escaping([tempPoint]) -> ()) { // <-- here
if let url = URL(string: "[MyWebService.com]") {
URLSession.shared.dataTask(with: url) { data, response, error in
if let data = data {
do {
let points = try JSONDecoder().decode([tempPoint].self, from: data)
completion(points) // <-- here return the results when done
return
} catch let error {
print(error) // <-- here todo deal with errors
}
}
completion([]) // <-- here todo deal with errors
}.resume()
} else {
completion([]) // <-- here todo deal with errors
}
}
and call the function like this:
getAllPoints() { results in
print("array of points: \(results)")
}
My understanding is that you wanted the api response at the position of calling your function. You can return your response using closures.
The typealias you are seeing in the below code are self defined data types. You can directly add closures in your function but to make it more simple for you I declare those closures with typealias as data types. You can read more about typealias and closures here.
After declaring our own closure types. We need to use them in our function as parameters.
struct TempPoint: Decodable {
let idPoint:Int
let ptName:String
let ptLat:Double
let ptLong:Double
}
typealias ApiResponse = ([TempPoint]) -> Void
typealias ApiError = (Error) -> Void
func getAllPoints(_ completion: #escaping ApiResponse, apiError: #escaping ApiError){
if let url = URL(string: "[MyWebService.com]") {
URLSession.shared.dataTask(with: url) { data, response, error in
if let data = data {
if let jsonString = String(data: data, encoding: .utf8) {
let jsonData = Data(jsonString.utf8)
do {
let points = try JSONDecoder().decode([TempPoint].self, from: jsonData)
completion(points)
} catch let error {
print(error)
apiError(error)
}
print(jsonString)
}
}
}.resume()
}
}
Our function after changes would look like above.
Now here is how we can use this function.
override func viewDidLoad() {
super.viewDidLoad()
getAllPoints { [weak self] (points) in
// you update you UI here, be sure to call in main thread when you are doing UI updates in closures.
print(points)
} apiError: { (error) in
print(error)
}
}
It would be efficient if things are loosely coupled which can be done with Delegate pattern.
protocol TempPointDelegate {
func didUpdatePoints(_ tempPoints: [tempPoint])
func didFailWithError(error: Error)
}
and in tempPoint Struct
struct tempPoint: Decodable {
let idPoint:Int
let ptName:String
let ptLat:Double
let ptLong:Double
}
var delegate: TempPointDelegate?
func getAllPoints(){
if let url = URL(string: "[MyWebService.com]") {
URLSession.shared.dataTask(with: url) { data, response, error in
if let data = data {
if let jsonString = String(data: data, encoding: .utf8) {
let jsonData = Data(jsonString.utf8)
do {
let points = try JSONDecoder().decode([tempPoint].self, from: jsonData)
self.delegate?.didUpdatePoints(points)
return
} catch let error {
self.delegate?.didFailWithError(error)
return
}
}
}
}.resume()
}
}
finally in your ViewController implement tempPointDelegate delegate
class MainViewController: tempPointDelegate{
override func viewDidLoad() {
super.viewDidLoad()
tempPoint.getAllPoints()
}
func didUpdatePoints(_ tempPoints: [tempPoint]) {
DispatchQueue.main.async {
//process the tempPoints here / call the func to handle tempPoints
}
}
func didFailWithError(error: Error) {
//process the error returned here.
}
}
First of all please name structs with starting uppercase letter (TempPoint).
Second of all the conversion to String and back to Data is pointless
In Swift 5.5 you can use async/await
func getAllPoints() async throws -> [TempPoint] {
guard let url = URL(string: "[MyWebService.com]") else { throw URLError(.badURL) }
let (data, _) = try await URLSession.shared.data(from : url)
return try JSONDecoder().decode([TempPoint].self, from: data)
}
And call it
Task {
do {
let points = try await getAllPoints()
} catch {
print(error)
}
}
I'm trying to retrieve images from array of url..
I have this function that do the same as I won't but it doesn't work so I tried to use URLSession but didn't know how exactly to make it >>
func downloadImages(imageUrls: [String], completion: #escaping (_ images: [UIImage?]) -> Void) {
var imageArray: [UIImage] = []
var downloadCounter = 0
for link in imageUrls {
let url = NSURL(string: link)
let downloadQueue = DispatchQueue(label: "imageDowmloadQueue")
downloadQueue.sync {
downloadCounter += 1
let data = NSData(contentsOf: url! as URL)
if data != nil {
//image data ready and need to be converted to UIImage
imageArray.append(UIImage(data: data! as Data)!)
if downloadCounter == imageArray.count {
DispatchQueue.main.async {
completion(imageArray)
}
}
} else {
print("couldnt download image")
completion(imageArray)
}
}
}
}
The function I work on :
public func imagesFromURL(urlString: [String],completion: #escaping (_ images: [UIImage?]) -> Void) {
var imageArray: [UIImage] = []
var downloadCounter = 0
let downloadQueue = DispatchQueue(label: "imageDowmloadQueue")
for link in urlString {
downloadQueue.sync {
downloadCounter += 1
let dataTask = URLSession.shared.dataTask(with: NSURL(string: link)! as URL, completionHandler: { (data, response, error ) in
if error != nil {
print(error ?? "No Error")
return
}
if data != nil {
imageArray.append(UIImage(data: data! as Data)!)
if downloadCounter == imageArray.count {
completion(imageArray)
}
} else {
print("couldnt download image")
completion(imageArray)
}
} dataTask.resume()
}
}
}
i want to call the function in the collection cell and get the display the first image only from each artwork array..
//download the first image only to display it:
if artwork.ImgLink != nil && artwork.ImgLink.count > 0 {
downloadImages(imageUrls: [artwork.ImgLink.first!]) { (images) in
self.artworkImage.image = images.first as? UIImage
}
}
If you intend to use only the first available UIImage from an array of urls, you do not design a function trying to download all of them. Instead, try to download from the first url, return the downloaded UIImage if it succeeds, or continue with the second url if it fails, repeat until you get an UIImage.
Creating a DispatchQueue in a local function looks dangerous to me. A more common practice is to maintain a queue somewhere else and pass it to the function as a parameter, or reuse one of the predefined global queues using DispatchQueue.global(qos:) if you don't have a specific reason.
Be careful with sync. sync blocks the calling thread until your block finishes in the queue. Generally you use async.
Use a Int counter to control when to finish multiple async tasks (when to call the completion block) works but can be improved by using DispatchGroup, which handles multiple async tasks in a simple and clear way.
Here's two functions. Both work. firstImage(inURLs:completion:) only return the first UIImage that it downloads successfully. images(forURLs:completion:) tries to download and return them all.
func firstImage(inURLs urls: [String], completion: #escaping (UIImage?) -> Void) {
DispatchQueue.global().async {
for urlString in urls {
if let url = URL(string: urlString) {
if let data = try? Data(contentsOf: url), let image = UIImage(data: data) {
DispatchQueue.main.async {
completion(image)
}
return
}
}
}
DispatchQueue.main.async {
completion(nil)
}
}
}
// Use it.
firstImage(inURLs: artwork.ImgLink) { image in
self.artworkImage.image = image
}
func images(forURLs urls: [String], completion: #escaping ([UIImage?]) -> Void) {
let group = DispatchGroup()
var images: [UIImage?] = .init(repeating: nil, count: urls.count)
for (index, urlString) in urls.enumerated() {
group.enter()
DispatchQueue.global().async {
var image: UIImage?
if let url = URL(string: urlString) {
if let data = try? Data(contentsOf: url) {
image = UIImage(data: data)
}
}
images[index] = image
group.leave()
}
}
group.notify(queue: .main) {
completion(images)
}
}
// Use it.
images(forURLs: artwork.ImgLink) { images in
self.artworkImage.image = images.first(where: { $0 != nil }) ?? nil
}
I have a WordPress post and this contains a post picture that is updated regularly. I would like to dynamically query this post picture in Swift but have not yet found a solution for it.
Could someone help me?
Here is my code for which I am requesting a regular image at the moment:
var coursesPicture = [CoursesPicture]()
// MARK: - GUID
struct GUIDURL: Codable {
let rendered: String
}
// MARK: - Courses
struct Course: Codable {
let guid, title: GUID
let content: Content
let links: Links
enum CodingKeys: String, CodingKey {
case guid, title, content
case links = "_links"
}
}
// MARK: - Content
struct Content: Codable {
let rendered: String
let protected: Bool
}
// MARK: - GUID
struct GUID: Codable {
let rendered: String
}
// MARK: - Links
struct Links: Codable {
}
// MARK: - CoursePicture
struct CoursesPicture: Codable {
let featuredMedia: Int
enum CodingKeys: String, CodingKey {
case featuredMedia = "featured_media"
}
}
public func fetchJSONPicture() {
let urlString = "https://ismaning.de/wp-json/wp/v2/media/4291"
guard let url = URL(string: urlString) else { return }
URLSession.shared.dataTask(with: url) { (data, _, err) in
DispatchQueue.main.sync {
if let err = err {
print("Failed to get data from url:", err)
return
}
guard let data = data else { return }
do {
self.coursesPicture = [try JSONDecoder().decode(CoursesPicture.self, from: data)]
} catch let jsonErr {
print("Failed to decode:", jsonErr)
}
}
}
if let url = URL(string: "https://ismaning.de/wp-content/uploads/ismaning-willkommen-banner_app-ios.jpg") {
URLSession.shared.dataTask(with: url) { (data, urlResponse, error) in
if let data = data {
DispatchQueue.main.sync {
self.imageView.image = UIImage(data: data)
}
}
}.resume()
}
}
I simply query the image here via a URL. Nevertheless, it should be queried dynamically via a WordPress post. I also tried this JSON query but unfortunately I haven't found a solution yet
Thank you in advance for your help, as I have been looking for a solution for a while now
After discussion in the chat we found a working solution for this problem. If anyone else has this you can simply do this:
Create two structs, example Struct Response: Codable{}
Create two arrays which are of the struct types like: var arr:[Response] = []
In the ViewDidLoad you will call the getJsonData method with completion block.
When the data is loaded in the first array, you call the getJsonImage method with completion block.
Once you have the imageURL you can simply retrieve it by creating a URLSession to retrieve the image.
This is the solution code:
//Arrays
var firstArray:[FirstResponse] = []
var imgData:[ImgData] = []
override func viewDidLoad() {
super.viewDidLoad()
//Fetching the JSON data
fetchJSON {
//Fetching the JSON image
self.fetchJSONImage {
let imageUrl = self.imgData[0].link
self.imgView.downloaded(from: imageUrl)
}
}
}
//Retrieving the JSON data
func fetchJSON(completed: #escaping () -> ()){
var urlString = "HIDDEN"
urlString = urlString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
guard let url = URL(string: urlString) else {return}
//Create the URLSession
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else{
return
}
do{
//Sets the dataArray to JSON data
self.firstArray = [try JSONDecoder().decode(FirstResponse.self, from: data)]
//Complete task in background
DispatchQueue.main.async {
completed()
}
}
catch let jsonErr{
print(jsonErr)
}
}.resume()
}
//Retrieving the image link from JSON
func fetchJSONImage(completed: #escaping () -> ()){
let imgPath = firstArray[0].featured_media
var urlString = "HIDDEN-URL\(imgPath)"
urlString = urlString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
guard let url = URL(string: urlString) else {return}
//Create the URLSession
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else{
return
}
do{
//Sets the dataArray to JSON data
self.imgData = [try JSONDecoder().decode(ImgData.self, from: data)]
//Complete task in background
DispatchQueue.main.async {
completed()
}
}
catch let jsonErr{
print(jsonErr)
}
}.resume()
}
}
//Struct for getting image ID
struct FirstResponse: Codable{
let featured_media: Int
}
//Struct for getting the image link
struct ImgData: Codable{
let link: String
}
//Extension
extension UIImageView {
//Download the image from the API
func downloaded(from url: URL, contentMode mode: UIView.ContentMode = .scaleToFill) {
contentMode = mode
URLSession.shared.dataTask(with: url) { data, response, error in
guard let image = UIImage(data: data)
else { return }
//Continue in background
DispatchQueue.main.async() {
self.image = image
}
}.resume()
}
func downloaded(from link: String, contentMode mode: UIView.ContentMode = .scaleAspectFit) {
guard let url = URL(string: link) else { return }
downloaded(from: url, contentMode: mode)
}
}
I have an app where a user reviews an array of users. Example:
["user1","user2","user3","user4"]
When the user reviews the first user the app should present the second user for voting. Unfortunately when a user votes on the user2, user3, user4; the value for user1 is what's put in the database. I tested the PHP via postman and there's no issue there, so it has to be in the swift code. Here is my code:
func loadCards()->[String] {
let username = user!["username"] as! String
let url = URL(string: "http://localhost/shotsCenter.php")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
let body = "username=\(username)"
request.httpBody = body.data(using: .utf8)
// launch session
URLSession.shared.dataTask(with: request) { data, response, error in
// getting main queue of proceeding inf to communicate back, in another way it will do it in background
// and user will no see changes :)
DispatchQueue.main.async(execute: {
if error == nil {
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? [String: AnyObject]
// clean up
self.valueArray.removeAll(keepingCapacity: false)
self.circleArray.removeAll(keepingCapacity: false)
// delcare new secure var to store json
guard let parseJSON = json else {
print("Error while parsing")
return
}
// declare new secure var to store $returnArray["users"]
guard let parseUSERS = parseJSON["users"] else {
print(parseJSON["message"])
return
}
self.valueArray = parseUSERS as! [AnyObject]
if self.valueArray.count > 0 {
let num_currentLoadedCardsArrayCap = (self.valueArray.count > MAX_BUFFER_SIZE) ? MAX_BUFFER_SIZE : self.valueArray.count
for (i, value) in self.valueArray.enumerated() {
let ava = self.valueArray[i]["ava"]
let id = self.valueArray[i]["id"]
let age = (NSString(format: "%#", self.valueArray[i]["age"] as! CVarArg))
let city = self.valueArray[i]["city"]
let state = self.valueArray[i]["state"]
self.age.append(age as AnyObject)
self.city.append(city as AnyObject)
self.state.append(state as AnyObject)
let url = NSURL(string: ava! as! String)!
let imageData = try? Data(contentsOf: url as URL)
let image = UIImage(data: imageData!)!
self.circleArray.append(image)
let reviewed = self.valueArray[i]["username"]
self.reviewed.append((reviewed as AnyObject) as! String)
print("reviewed user", reviewed! as Any)
let newCard = self.createDraggableViewWithData(at: i, value:value as! NSDictionary)
self.allCardsArray.append(newCard)
if i < num_currentLoadedCardsArrayCap {
self.currentLoadedCardsArray.append(newCard)
}
}
for (i,_) in self.currentLoadedCardsArray.enumerated() {
if i > 0 {
self.viewTinderBackGround.insertSubview(self.currentLoadedCardsArray[i], belowSubview: self.currentLoadedCardsArray[i - 1])
}
else {
self.viewTinderBackGround.addSubview(self.currentLoadedCardsArray[i])
}
self.currentIndex += 1
}
self.animateCardAfterSwiping()
self.perform(#selector(self.createDummyCard), with: nil, afterDelay: 1.0)
}
} catch {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = "\(error)"
})
return
}
} else {
DispatchQueue.main.async(execute: {
let message = error!.localizedDescription
})
return
}
})
} .resume()
return reviewed
}
func insertShot(_ rating: String, _ reviewed2: NSDictionary) {
let reviewer = user!["username"] as! String
let reviewed2 = reviewed[index]
let url = URL(string: "http://localhost/shotsCenter.php")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
// param to be passed to php file
let param = [
"user" : reviewer,
"revieweduser" : reviewed2,
"rating" : rating
] as [String : Any]
// body
let boundary = "Boundary-\(UUID().uuidString)"
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
// ... body
request.httpBody = createBodyWithParams(param as? [String : String], boundary: boundary)
// launch session
URLSession.shared.dataTask(with: request) { data, response, error in
// get main queu to communicate back to user
DispatchQueue.main.async(execute: {
if error == nil {
do {
// json containes $returnArray from php
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
// declare new var to store json inf
guard let parseJSON = json else {
print("Error while parsing")
return
}
// get message from $returnArray["message"]
let message = parseJSON["message"]
//print(message)
// if there is some message - post is made
if message != nil {
// reset UI
// self.msgTxt.text = ""
// switch to another scene
//self.tabBarController?.selectedIndex = 3
//_ = self.navigationController?.popViewController(animated: true)
}
} catch {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = "\(error)"
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
} else {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = error!.localizedDescription
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
})
}.resume()
}
No idea what currentIndex is for. Sth about the view hierarchy?
index is an interesting candidate. The only times it is used is in
let reviewed2 = reviewed[index]
and I see no modification to it. Since usernames are stored in there with
let reviewed = self.valueArray[i]["username"]
I think you are sending the same username for all four ratings, since reviewed2 is then made of the .httpBody. That's a guess from what I can see.
Tip: Codable
Codable may save you a lot of the ugliness of juggling around with AnyObject & co, since you'll have a [User] array instead of.. 4 separate arrays which you access with [index]. https://app.quicktype.io will get you started quickly by providing you with the parsing code for the given JSON.
I am trying to load data in JSON format from my server into IOS application.
Here is my JSON:
[
{
"BankName": "bank1",
"CurrencyName": "cur1",
"SellRate": "0.65",
"BuyRate": "0.55",
"OfficialRate": "0.6"
},
{
"BankName": "bank1",
"CurrencyName": "cur2",
"SellRate": "1.65",
"BuyRate": "1.55",
"OfficialRate": "1.6"
}
]
There are 2 files in my project:
1:
import Foundation
class Shot {
var bankName: String!
var currencyName: String!
var sellRate: String!
var buyRate: String!
var offRate: String!
init (data: NSDictionary) {
self.bankName = getStringFromJSON(data, key:"BankName")
self.currencyName = getStringFromJSON(data, key:"CurrencyName")
self.sellRate = getStringFromJSON(data, key:"SellRate")
self.buyRate = getStringFromJSON(data, key:"BuyRate")
self.offRate = getStringFromJSON(data, key: "OfficialRate")
}
func getStringFromJSON(data: NSDictionary, key: String) -> String {
if let info = data[key] as? String{
return info
}
return ""
}
}
2:
import Foundation
class JsonTest {
func loadJson(completion: ((AnyObject) -> Void)!) {
var urlString = "http://a.com/g.php"
let session = NSURLSession.sharedSession()
let sourceUrl = NSURL(string: urlString)
var task = session.dataTaskWithURL(sourceUrl!){
(data, response, error) -> Void in
if error != nil {
println(error.localizedDescription)
} else {
var error: NSError?
var jsonData = NSJSONSerialization.JSONObjectWithData(data, options: .MutableContainers, error: &error) as NSArray
var shots = [Shot]()
println(jsonData)
for shot in jsonData{
let shot = Shot(data: shot as NSDictionary)
shots.append(shot)
}
println(shots) //[jsontest.Shot, jsontest.Shot]
}
}
task.resume()
}
}
I am trying to populate array automatically when my app starts. To do it I have a code in my mainViewController class.
override func viewDidLoad() {
super.viewDidLoad()
let api = JsonTest()
api.loadJson(nil)
}
The problem occurs when I try to print shots variable in the second file.
it returns [jsontest.Shot, jsontest.Shot] when I was expecting the array of dictionaries.
println(jsonData) works fine and shows JSON data from URL.
Can anybody advise what is wrong in my program?
"shots" is an array of instances of Shot, not a dictionary:
class Shot {
var bankName: String!
var currencyName: String!
var sellRate: String!
var buyRate: String!
var offRate: String!
init (data: NSDictionary) {
self.bankName = getStringFromJSON(data, key:"BankName")
self.currencyName = getStringFromJSON(data, key:"CurrencyName")
self.sellRate = getStringFromJSON(data, key:"SellRate")
self.buyRate = getStringFromJSON(data, key:"BuyRate")
self.offRate = getStringFromJSON(data, key: "OfficialRate")
}
func getStringFromJSON(data: NSDictionary, key: String) -> String {
if let info = data[key] as? String{
return info
}
return ""
}
}
var shots = [Shot]()
let urlString = "http://almazini.lt/getrates.php"
let sourceUrl = NSURL(string: urlString)
// Using NSData instead of NSURLSession for experimenting in Playground
let data = NSData(contentsOfURL: sourceUrl!)
var error: NSError?
// As I'm using Swift 1.2 I had to change "as" with "as!"
let jsonData = NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers, error: &error) as! NSArray
for shot in jsonData{
let shot = Shot(data: shot as! NSDictionary)
shots.append(shot)
}
println(shots[0].bankName)
Update for Swift 2
var shots = [Shot]()
let urlString = "http://almazini.lt/getrates.php"
// Using NSData instead of NSURLSession for experimenting in Playground
if let sourceUrl = NSURL(string: urlString) {
NSURLSession.sharedSession().dataTaskWithURL(sourceUrl, completionHandler: { (data, response, error) in
if error == nil {
if let data = data, jsonData = try? NSJSONSerialization.JSONObjectWithData(data, options: []), jsonArray = jsonData as? [NSDictionary] {
for item in jsonArray {
let shot = Shot(data: item)
shots.append(shot)
}
print(shots[0].bankName)
} else {
print("no JSON data")
}
} else {
print(error!.localizedDescription)
}
}).resume()
}
Seems like there are two problems:
You're trying to use println to debug instead of setting a breakpoint and checking your objects values.
You have not created a description or debugDescription property for your object, so println on your object is just using some default implementation.
shots is an array of your custom object, so when you call println, it's using the description for Array, which prints out the objects in the array, comma separated, and within square brackets.
The default description property for classes in Swift just prints the class name.
Ideally, you should just use a break point to check the values of your object to be certain it initialized correctly, but if it's actually important to get them to print right, it's only a matter of implementing the description property:
override var description: String {
get {
// build and return some string that represents your Shot object
}
}