An easy-to-use Collection View Layout for card-like animation

CarLensCollectionViewLayout

An easy-to-use Collection View Layout for card-like animation.

CarLensCollectionViewLayout was created out of the implementation in CarLens application . The image above exactly shows the screen from the app!

Requirements

CarLensCollectionViewLayout is written in Swift 4.2 and supports iOS 9.0+.

Usage

Basic Usage

The two main steps are needed for the configuration of CarLensCollectionViewLayout:

Step 1

Assign CarLensCollectionViewLayout to yours collection view layout:

collectionView.collectionViewLayout = CarLensCollectionViewLayout()

or initialize your collection view with CarLensCollectionViewLayout:

UICollectionView(frame: .zero, collectionViewLayout: CarLensCollectionViewLayout())

Step 2

Subsclass CarLensCollectionViewCell and call configure(topView: UIView, cardView: UIView) right on the start!

class CollectionViewCell: CarLensCollectionViewCell {
    override init(frame: CGRect) {
	super.init(frame: frame)
	configure(topView: upperView, cardView: bottomView)
    }
}

The sample implementation is available in Demo project.

Customization

Layout

You can also initialize CarLensCollectionViewLayout with a CarLensCollectionViewLayoutOptions object by passing any of the parameters available. Others will be configured automatically.

Parameters:

minimumSpacing - A minimum spacing between cells.

decelerationRate - A deceleration for a scroll view.

shouldShowScrollIndicator - A value indicating whether collection view should have a scroll indicator.

itemSize - The size to use for cells.

Example:

let options = CarLensCollectionViewLayoutOptions(minimumSpacing: 40)
collectionView.collectionViewLayout = CarLensCollectionViewLayout(options: options)

Cell

While subsclassing CarLensCollectionViewCell you can call configure(...) with an additional parameter topViewHeight. The card view height will be calculated based on this value.