Normally a UICollectionView has no transition effects when you scroll from one item to another. There are lots of ways to write animations for UICollectionView, but using a UICollectionViewLayout subclass is by far the simplest one. And it doesn't break any of your existing code. You can still use your UICollectionView subclass and you don't need to change your UICollectionViewCell. Just plug and enjoy.

Parallax	ZoomInOut	RotateInOut	Cards
CrossFade	Cube	Page

To run the example project, clone the repo, and start iOS Example in Xcode.

• iOS 9.0+

To integrate AnimatedCollectionViewLayout into your Xcode project using CocoaPods, specify it in your Podfile:

For Swift 4.2 or above:

pod 'AnimatedCollectionViewLayout'

For Swift 4.1 or below:

pod 'AnimatedCollectionViewLayout', '~> 0.3.0'

Carthage and Swift Package Manager are also supported.

Import the library where you want to use it. Create a AnimatedCollectionViewLayout object, set its animator and assign it to your UICollectionView.

import AnimatedCollectionViewLayout
// ...
let layout = AnimatedCollectionViewLayout()
layout.animator = ParallaxAttributesAnimator()
collectionView.collectionViewLayout = layout

Most of the built-in animators work best in Paging mode and they have additional parameters that you can tweak for better transitions. You can also write your own animators by implementing the protocol LayoutAttributesAnimator.

Jin Wang

AnimatedCollectionViewLayout is available under the MIT license. See the LICENSE file for more info.