ECUICollectionViewMultiDelegate

Adds the ability for a collection view to have multiple delegates.

Installation

Swift Package Manager

.package(url: "https://github.com/EvanCooper9/ECUICollectionViewMultiDelegate", from: "0.1.0")

Usage

Initial setup

1. Create an instance of ECUICollectionViewMultiDelegate
2. Set your collection view's delegate to that instance
3. Add and remove as many delegates to your ECUICollectionViewMultiDelegate instance through add and remove methods

Delegate methods that return values

Some UICollectionViewDelegate methods require a return value (i.e. collectionView(_ collectionView: UICollectionView, shouldHighlightItemAt indexPath: IndexPath) -> Bool). When multiple delegates are involved, it's hard to decide which value to take. ECUICollectionViewMultiDelegate will attempt to reduce all of the values returned by all the delegates, via it's reductionDelegate property.

1. Implement ECReductionDelegate
2. Assign the reductionDelegate property of your ECUICollectionViewMultiDelegate instance and decide which value to return

Note: If reductionDelegate is nil, the value returned will be from the last added delegate that responds to the current method. If no delegate responds to the current method, the default UICollectionViewDelegate value will be returned, as if no delegate was ever assigned.