uiimage of uiimageview doesn't update before NSURLConnection sendSynchronousRequest (iphone)

I'm replacing an uiimage of uiimageview before calling NSURLConnection sendSynchronousRequest, an as a re开发者_高级运维sult i don't see the new uiimage.

How i can resolve this?

tnx

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Let the UI update happen (from the run loop) before sending your synchronous request. Use NSObject's performSelector:withObject:afterDelay: to schedule a method after a (zero) delay. In the method you specify in the selector argument you would send the request.

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Make an asynchronous request or move the synchronous request into a separate thread. You can use performSelectorInBackground:withObject: for simple cases.