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POHow to animate UIImageViews like hatch doors opening
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  1. POHow to animate UIImageViews like hatch doors opening
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    copied!<p>I'm trying to create an animation that would look like 2 french doors (or 2 hatch doors) opening towards the user.</p> <p>I tried using the built in UIViewAnimationOptionTransitionFlipFromRight transition, but the origin of the transition seems to be the center of the UIImageView rather than the left edge. Basically I have 2 UIImageViews that each fill have the screen. I would like the animation to look like the UIImageViews are lifting from the center of the screen to the edges.</p> <pre><code>[UIView transitionWithView:leftView duration:1.0 options:UIViewAnimationOptionTransitionFlipFromRight animations:^ { leftView.alpha = 0; } completion:^(BOOL finished) { [leftView removeFromSuperview]; }]; </code></pre> <p>Has anyone done something like this before? Any help would be awesome!</p> <p>UPDATE: Working code thanks to Nick Lockwood</p> <pre><code>leftView.layer.anchorPoint = CGPointMake(0, 0.5); // hinge around the left edge leftView.frame = CGRectMake(0, 0, 160, 460); //reset view position rightView.layer.anchorPoint = CGPointMake(1.0, 0.5); //hinge around the right edge rightView.frame = CGRectMake(160, 0, 160, 460); //reset view position [UIView animateWithDuration:0.75 animations:^{ CATransform3D leftTransform = CATransform3DIdentity; leftTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective leftTransform = CATransform3DRotate(leftTransform, -M_PI_2, 0, 1, 0); leftView.layer.transform = leftTransform; CATransform3D rightTransform = CATransform3DIdentity; rightTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective rightTransform = CATransform3DRotate(rightTransform, M_PI_2, 0, 1, 0); rightView.layer.transform = rightTransform; }]; </code></pre>
 

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