While you can create curl animations using UIView animations with the UIViewAnimationTransitionCurlUp and UIViewAnimationTransitionCurlDown you are limited with just the up and down directions.
Here’s a library called ASAnyCurlController from Autresphere that allows you to create curl animations from any direction.
With ASAnyCurlController you can easily apply the animation to a view controller to transition between to view controllers or you can apply AsAnyCurlController to any view.
You have a choice of eight locations you can create the curl animations from, and you can curl both up and down.
Here’s an animation from the readme showing up curls with AsAnyCurlController operating from all directions:
You can find AsAnyCurlController on Github here.
A nice easy way to create curl animations from any direction.
Thanks to Tom for the submission.
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Original article: Open Source iOS Library Allowing You To Create Curl Animations From Any Direction
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