Question

I am trying to remove a subview form a view with animation like below. However, when I click a button to run the code, the view is removed immediately. Does anyone know what happen here.

Thanks,

CGRect rect=[self.view viewWithTag:10].frame;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:1];
        [UIView setAnimationDidStopSelector:@selector(removeLayer)];
        [[self.view viewWithTag:10] setFrame:CGRectMake(rect.origin.x, btn.frame.origin.y, rect.size.width, 0)];
        [UIView animateWithDuration:1.0 animations:^{[[self.view viewWithTag:10] setFrame:CGRectMake(rect.origin.x, btn.frame.origin.y, rect.size.width, 0)];} completion:^(BOOL finished){[[self.view viewWithTag:10] removeFromSuperview];}];
        [UIView commitAnimations];


-(void)removeLayer{
    [[self.view viewWithTag:10] removeFromSuperview];
}

Answer 1

It looks like you are trying to use two different animation methods simultaneously. All you need is:

CGRect rect=[self.view viewWithTag:10].frame;

[UIView animateWithDuration:1.0 animations:^{[[self.view viewWithTag:10] setFrame:CGRectMake(rect.origin.x, btn.frame.origin.y, rect.size.width, 0)];} completion:^(BOOL finished){[[self.view viewWithTag:10] removeFromSuperview];}];