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PO3D Door Open Animation between two UIViewControllers
 

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  1. PO3D Door Open Animation between two UIViewControllers
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    <p>This has been asked before, but there is no sample code to be found on stackoverflow and no proper solutions as far as I'm aware. I have a solution, but it looks crap. I'd be grateful for any input and modifications to get a more realistic 3D door open / book cover animation.</p> <p>Aim is to have an animation between UIViewControllers so that you get the effect as if you were opening a door or a book cover. ViewController 2 is static and in the background. Above it you place ViewController 1 which covers ViewController 2. The animation will open ViewController 1 (like a hardcover book) and reveal ViewController 2 (your first page so to say, or whatever is behind the door).</p> <p>First thing to note is that you can't do this with an UINavigationController as it is difficult to overwrite the custom animations. A proper tutorial on how to set up our two ViewControllers can be found here: <a href="http://dmunsie.wordpress.com/2009/08/07/custom-animations-between-uiviewcontrollers/" rel="nofollow noreferrer">ViewController Animations</a></p> <p>So once everything is setup, here is my custom animation which looks crap. It basically looks as if you are squeezing the door / cover of the book to the left. There is no 3D feel to it, I'm afraid. Any suggestions of how to make this better would be welcome:</p> <pre><code>-(void)openDoorTo:(UIViewController *)aController duration:(float)aDuration { [aController viewWillAppear:YES]; [activeController viewWillDisappear:YES]; [self.view insertSubview:aController.view belowSubview:activeController.view]; // so that it is below activeController [aController viewDidAppear:YES]; [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:aDuration]; aController.view.transform = CGAffineTransformMakeTranslation(0,0); CATransform3D _3Dt = CATransform3DIdentity; _3Dt = CATransform3DTranslate(_3Dt, -320, 0, 0); _3Dt = CATransform3DRotate(_3Dt, M_PI * 1.5, 0.0, 1, 0.0); _3Dt = CATransform3DTranslate(_3Dt, 320, 0, 0); activeController.view.layer.transform = _3Dt; [UIView commitAnimations]; [self performSelector:@selector(animationDone:) withObject:aController afterDelay:aDuration]; } </code></pre> <p>I think the main problem is that I don't really know how to handle <code>CATransform3DTranslate</code> and <code>CATransform3DRotate</code>.</p> <p>Here are some posts on this, but I can't really see how to apply them to a 3D Door opener:</p> <p><a href="https://stackoverflow.com/questions/6531332/how-to-rotate-an-uiimageview-with-catransform3drotate-make-an-effect-like-door-op">3D Door - but Axis in the middle</a></p> <p><a href="https://stackoverflow.com/questions/5385898/the-paper-folding-unfolding-effect-in-twitter-for-ipad/6502349#6502349">3D Unfolding</a></p>
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