Animate UIView height from bottom to top

Question

I\'m doing a simple animation of UIView height so that it reveals.

By default it seems to be revealing from top to bottom, and I want it to reveal bottom to top.

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Answer 1

hide under bottom

[self animateViewHeight:myView withAnimationType:kCATransitionFromBottom];

for reverse animation

[self animateViewHeight:myView withAnimationType:kCATransitionFromTop];

...

- (void)animateViewHeight:(UIView*)animateView withAnimationType:(NSString*)animType {  
    CATransition *animation = [CATransition animation];
    [animation setType:kCATransitionPush];
    [animation setSubtype:animType];

    [animation setDuration:0.5];
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
    [[animateView layer] addAnimation:animation forKey:kCATransition];
    animateView.hidden = !animateView.hidden;
}