You can use a semaphore to block the current thread and wait for your URL session to finish. Create the semaphore, kick off your URL session, then wait on the semaphore. From your URL session completion callback, signal the semaphore. You could use a global flag (declare a volatile boolean variable) and poll that from … Read more
If you want downloads to progress after your app is no longer in foreground, you have to use background session. The basic constraints of background sessions are outlined in Downloading Files in Background, and are essentially: Use delegate-based URLSession with background URLSessionConfiguration. Use upload and download tasks only, with no completion handlers. In iOS, Implement … Read more
Sending POST and GET requests in iOS is quite easy; and there’s no need for an additional framework. POST Request: We begin by creating our POST‘s body (ergo. what we’d like to send) as an NSString, and converting it to NSData. objective-c NSString *post = [NSString stringWithFormat:@”test=Message&this=isNotReal”]; NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; Next up, … Read more
ObjC NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration]; sessionConfig.timeoutIntervalForRequest = 30.0; sessionConfig.timeoutIntervalForResource = 60.0; Swift let sessionConfig = URLSessionConfiguration.default sessionConfig.timeoutIntervalForRequest = 30.0 sessionConfig.timeoutIntervalForResource = 60.0 let session = URLSession(configuration: sessionConfig) What docs say timeoutIntervalForRequest and timeoutIntervalForResource specify the timeout interval for the request as well as the resource. timeoutIntervalForRequest – The timeout interval to use when waiting … Read more
All error codes are on “CFNetwork Errors Codes References” on the documentation (link) A small extraction for CFURL and CFURLConnection Errors: kCFURLErrorUnknown = -998, kCFURLErrorCancelled = -999, kCFURLErrorBadURL = -1000, kCFURLErrorTimedOut = -1001, kCFURLErrorUnsupportedURL = -1002, kCFURLErrorCannotFindHost = -1003, kCFURLErrorCannotConnectToHost = -1004, kCFURLErrorNetworkConnectionLost = -1005, kCFURLErrorDNSLookupFailed = -1006, kCFURLErrorHTTPTooManyRedirects = -1007, kCFURLErrorResourceUnavailable = -1008, kCFURLErrorNotConnectedToInternet … Read more
The harshest criticisms of synchronous network requests are reserved for those who do it from the main queue (as we know that one should never block the main queue). But you’re doing it on your own background queue, which addresses the most egregious problem with synchronous requests. But you’re losing some wonderful features that asynchronous … Read more
You can use URL, URLRequest and URLSession or NSURLConnection as you’d normally do in Objective-C. Note that for iOS 7.0 and later, URLSession is preferred. Using URLSession Initialize a URL object and a URLSessionDataTask from URLSession. Then run the task with resume(). let url = URL(string: “http://www.stackoverflow.com”)! let task = URLSession.shared.dataTask(with: url) {(data, response, error) … Read more
You have a problem because your line: return minions does not return from your function. Instead, it returns from the completion handler in dataTaskWithRequest. And it shouldn’t be doing so because that closure is a void function. The problem which you have results from the fact that dataTaskWithRequest is an asynchronous operation. Which means that … Read more
Yes, this is expected behavior. One solution is to wrap your requests in custom, asynchronous NSOperation subclass, and then use the maxConcurrentOperationCount of the operation queue to control the number of concurrent requests rather than the HTTPMaximumConnectionsPerHost parameter. The original AFNetworking did a wonderful job wrapping the requests in operations, which made this trivial. But … Read more
You could try using a NSDictionary for the params. The following will send the parameters correctly to a JSON server. NSError *error; NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil]; NSURL *url = [NSURL URLWithString:@”[JSON SERVER”]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; [request addValue:@”application/json” forHTTPHeaderField:@”Content-Type”]; [request addValue:@”application/json” forHTTPHeaderField:@”Accept”]; [request setHTTPMethod:@”POST”]; … Read more