NSUrlConnection doesn't work. I don't get any response

Question

In my class I create a CBUrlConnection:

urlConnection = [NSURLConnection connectionWithRequest:request delegate:self];
[urlConnection start];

but I don't get any response, these delegate methods are never invoked:

- (void)connection:(NSURLConnection *)connection didFinishLoadingData:(NSData *)data error:(NSError *)error
- (void)connection:(NSURLConnection *)connection didUpdateProgress:(CGFloat)percent
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

The request seems to be correct, the server url is surely correct, and the server is working correctly. What could be wrong ?

Did you add `NSURLConnectionDelegate` to the list of protocols your class adopts? — Alexander, Jul 03 '12 at 09:35
Are you trying to use the connection inside of an NSOperation subclass? — Karl, Jul 03 '12 at 09:36

aneuryzm · Accepted Answer · 2012-07-03T10:48:04.557

4

I've just fixed it... it was because the code wasn't running on the main thread.

For who might be interested I've solved with:

dispatch_sync(dispatch_get_main_queue(), ^{

});

edited Jul 03 '12 at 10:48

answered Jul 03 '12 at 10:00

aneuryzm

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score 1 · Answer 2 · edited May 23 '17 at 12:14

1

You can absolutely run an NSURLConnection from inside an NSOperation. The actual trick is that an NSURLConnection needs a run loop. See http://www.cocoaintheshell.com/2011/04/nsurlconnection-synchronous-asynchronous/ and https://stackoverflow.com/a/6238764/171933

Johannes

edited May 23 '17 at 12:14

Community

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answered Jul 03 '12 at 10:39

Johannes Fahrenkrug

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NSUrlConnection doesn't work. I don't get any response

2 Answers2