iPhone UIAnimation using blocks not working

Question

As suggested by this popular answer, I am using blocks for animating views as per the code:

UIView *whiteout = [[UIView alloc] initWithFrame:self.view.frame];
whiteout.backgroundColor = [UIColor blackColor];
[self.view addSubview:whiteout];
[UIView transitionWithView:self.view duration:2.0 options:UIViewAnimationTransitionFlipFromRight animations:^{ [whiteout removeFromSuperview]; } completion:nil];

However the animation does not happen and the whiteout view is removed immediately. What am i missing here??

score 3 · Answer 1 · edited Mar 18 '12 at 08:00

3

Removing from a superview is not animatable. If you want to fade out your view, try setting its alpha to 0, then remove it on completion:

[UIView transitionWithView:self.view duration:2.0 options:UIViewAnimationTransitionFlipFromRight animations:^{
    whiteout.alpha = 0.0;
} completion:^(BOOL completion){
    [whiteout removeFromSuperview];
}];

edited Mar 18 '12 at 08:00

CodaFi

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answered Mar 18 '12 at 07:57

Thanx.. The fading effect works nice. But how can I add the flip transition effect?? – Shri Mar 18 '12 at 08:10
For a flip, you'll need a CATransform3D. – CodaFi Mar 18 '12 at 08:11
Then what does the option para "UIViewAnimationTransitionFlipFromRight" does? – Shri Mar 18 '12 at 08:18

iPhone UIAnimation using blocks not working

1 Answers1