performSelector:withObject:afterDelay: not making call

Question

in a method, i want to call a method after n seconds:

    self.toolBarState = [NSNumber numberWithInt:1];
    [self changeButtonNames];
    [self drawMap];
    [         


        

Answer 1

I got the same problem when I call performSelector:withObject:afterDelay: in a background thread created by ReactiveCocoa. If I execute the block in the ReactiveCocoa's way, the block will be called correctly:

 [[[RACSignal empty] delay:2.0] subscribeCompleted:^(){
    // do something
 }];

I guess there is some magic in the ReactiveCocoa's threading model.