Compiler gives warning on performSelectorOnMainThread:@selector(delegateMethod)

Question

I have an NSOperation that wraps some web service functionality. The NSOperation has a delegate that is to be messaged when the operation is over.

As the NSOperation

Answer 1

Actually on iOS 4 I prefer using NSNotifications and Observers (with Blocks) to perform updates on the mainthread.

- (id)addObserverForName:(NSString *)name object:(id)obj queue:(NSOperationQueue *)queue usingBlock:(void (^)(NSNotification *))block

I wrote down my design here.