performSelectorOnMainThread with multiple parameter

Question

I am trying to perform this action on the main thread:

[curItem.mButton setBackgroundImage:newArt forState:UIControlStateNormal];

So I do t

Answer 1

If you need to pass only one parameter, you should set up "withObject:" argument in method performSelectorOnMainThread:withObject:waitUntilDone. So your method should be declared as

-(void)setImageForButton:(id)parameter

and you should invoke method on main thread with:

[obj performSelectorOnMainThread:@selector(setImageForButton:) withObject:newArt waitUntilDone:YES];

Note ':' in @selector(setImageForButton:) this means that this method will be messaged with one argument, passed in withObject: