nsurlsessiondatatask

来源： https://stackoverflow.com/questions/49162544/nsurlsessiondatatask-completion-handler-not-executing-in-command-line-project

来源： https://stackoverflow.com/questions/49162544/nsurlsessiondatatask-completion-handler-not-executing-in-command-line-project

来源： https://stackoverflow.com/questions/46954162/is-session-datatask-asynchronous-in-swift

来源： https://stackoverflow.com/questions/46954162/is-session-datatask-asynchronous-in-swift

问题 In general, it is necessary to implement a class for the network. This is a class that will take a URL, and to give data. All this is done in order not to score an extra logic controllers. I encountered such a problem that when you first create a View, the data do not come. That's Network Class: private static var dataTask: NSURLSessionDataTask? private static var dataJSON: NSData? private static var sessionConfig: NSURLSessionConfiguration = { var configuration = NSURLSessionConfiguration

问题 I am trying to aggregate the data from multiple NSURLSessionDataTasks that will run concurrently. __block NSMutableDictionary *languageDetails = [NSMutableDictionary new]; [repos enumerateObjectsUsingBlock:^(NSDictionary *repoDict, NSUInteger idx, BOOL * _Nonnull stop) { NSString *languageUrl = repoDict[@"languages_url"]; NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithURL:[NSURL URLWithString:languageUrl] completionHandler:^(NSData * _Nullable data, NSURLResponse *

问题 I found this piece of code here on how to download images simultaneously without any breakages, func loadImageRobsAnswer(with urlString: String?) { // cancel prior task, if any weak var oldTask = currentTask currentTask = nil oldTask?.cancel() // reset imageview's image self.image = nil // allow supplying of `nil` to remove old image and then return immediately guard let urlString = urlString else { return } // check cache if let cachedImage = DataCache.shared.object(forKey: urlString) { self

问题 -(NSDictionary *)fetchFromUrl:(NSString *)url{ NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]]; NSURLSession *session = [NSURLSession sharedSession]; NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler: ^(NSData *data, NSURLResponse *response, NSError *error) { dataFetched = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL]; }]; [task resume]; NSLog(@"dataFetched, %@", dataFetched); return dataFetched; } So I

问题 I want to performe a Segue after sending a post request using URLSession.shared.dataTask ViewController: @IBAction func Connection(_ sender: AnyObject) { let loginFunc = Login() loginFunc.login(username: username.text!, password: password.text!) { jsonString in let response = jsonString print(response) if response.range(of: "failure") == nil { self.performSegue(withIdentifier: "home", sender: nil) } } } Login: class Login { // the completion closure signature is (String) -> () func login

问题 I have flight search feature in my application which is taking too long to get the data (more than 25 seconds). if application goes background or went to sleep mode, internet connection get disconnected. I have written below logic using apple example to make api request keep going even though if app goes to background but it's not working. self.session = [self backgroundSession]; self.mutableData = [NSMutableData data]; NSURL *downloadURL = [NSURL URLWithString:@"http://jsonplaceholder