completion block of uiview animate never called if view disappear

Question

i noticed some strange behavior. When i start a animation and change the View (the view will not dismissed!), the completion handler never get called.

[UIView animateWithDuration:0.1f 
                          delay:0.0f 
                        options:UIViewAnimationCurveEaseOut 
                     animations:^(void){
                         [myView setHidden:YES];
                         myLabel.alpha = 0.0f;
                         someOtherView.frame = CGRectMake(130, bubbleBigRect.origin.y, 61, 65);
                         [button setHidden:YES];
                     } 
                     completion:^(BOOL finished){
                         NSLog(@"Complete %d",finished);
                         [imageVIew setImage:[UIImage imageNamed:@"myPng.png"]];                    
                     }];
}

is there any solution for this?

Answer 1

Don't know where to write it, but I get the same thing that you have, but in my case the completion block was sometimes called. It might be same thing.
I found out that if in the animation block has nothing was animate- for example, if you set alpha=0 to uiview that is alpha is already 0, or you set content offset to UIScrollView to the same content offset (like in my case), the completion block not called.

Answer 2

Put this in your animation block, and put everything you want to do on completion in YOUR_SELECTOR method. You can now do whatever you want with your view and still have a way of executing something on completion!

[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(YOUR_SELECTOR)];