NSURLConnection didReceiveData not called

Question

I've read through tons of messages saying the same thing all over again : when you use a NSURLConnection, delegate methods are not called. I understand that Apple's doc are incomplete and reference deprecated methods, which is a shame, but I can't seem to find a solution. Code for the request is there : ``` // Create request NSURL *urlObj = [NSURL URLWithString:url]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:urlObj cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30]; [request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"]; if (![NSURLConnection canHandleRequest:request]) { NSLog(@"Can't handle request..."); return; } // Start connection dispatch_async(dispatch_get_main_queue(), ^{ self.connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES]; // Edited }); ``` ...and code for the delegate methods is here : ``` - (void) connection:(NSURLConnection *)_connection didReceiveResponse:(NSURLResponse *…

Accepted Answer

I like to use the sendAsynchronousRequest method.. there's less information during the connection, but the code is a lot cleaner.

```
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){
        if (data){
            //do something with data
        }
        else if (error)
            NSLog(@"%@",error);
    }];
```

From Apple:

By default, a connection is scheduled on the current thread in the default mode when it is created. If you create a connection with the initWithRequest:delegate:startImmediately: method and provide NO for the startImmediately parameter, you can schedule the connection on a different run loop or mode before starting it with the start method. You can schedule a connection on multiple run loops and modes, or on the same run loop in multiple modes.

Unless there is a reason to explicitly run it in [NSRunLoop currentRunLoop], you can remove these two lines:

```
[connection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
[connection start];
```

or change the mode to NSDefaultRunLoopMode

NSURLConnection didReceiveData not called

Solution

Problem