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

It might be even a better solution not call performSelectorOnMainThread: on a delegate or other protocol implementation. Make it the responsibility of the delegate/receiver to determine if it needs to do things on the main thread.

[delegate performSelector:@selector(delegateAction:)
               withObject:actionData];

Delegate implementation

- (void)delegateAction:(NSData*)actionData
{
    [self performSelectorOnMainThread:@selector(updateUIForAction:)
                           withObject:actionData
                        waitUntilDone:NO];
}

- (void)updateUIForAction:(NSData*)actionData
{
    // Update your UI objects here
}

It might look like more code, but the responsibility is in the right place now