15次快速调用后，NSURLConnection委托仅获得一次connectionDidFinishLoading

Question

I create 15 rapid requests using NSURLConnection

NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:url delegate:callback];
[conn start];

The server receives all 15 requests and provides the appropriate response. But my delegate object receives only a single connectionDidFinishLoading: method call.

What could be the underlying cause?

Answer 1

Try running the NSURLConnection on the main run loop:

NSURLConnection * connection = [[NSURLConnection alloc] 
                            initWithRequest:request
                                   delegate:callback 
                           startImmediately:NO];

[connection scheduleInRunLoop:[NSRunLoop mainRunLoop] 
                      forMode:NSDefaultRunLoopMode];
[connection start];

Also, when using:

 [[NSURLConnection alloc] initWithRequest:url delegate:callback];

You don't need to call start as the connection has already been started. start is only needed when using initWithRequest:delegate:startImmediately: and passed NO to startImmediately .