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SupplementaryViewFactory for section headers and footers #3

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Merged
merged 5 commits into from
Feb 12, 2020
Merged

SupplementaryViewFactory for section headers and footers #3

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603e0f3
Adds suplementary view factory
Feb 6, 2020
e23c825
Adds index path
Feb 6, 2020
1c2ece9
format fixes
alexjameslittle Feb 6, 2020
6dc945b
Use public instead of open on property
alexjameslittle Feb 9, 2020
c75e00f
Use a guard and provide a fatal error with message
alexjameslittle Feb 9, 2020
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10 changes: 10 additions & 0 deletions Sources/CombineDataSources/CollectionView/CollectionViewItemsController.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ public class CollectionViewItemsController<CollectionType>: NSObject, UICollecti

public typealias Element = CollectionType.Element.Element
public typealias CellFactory<Element: Equatable> = (CollectionViewItemsController<CollectionType>, UICollectionView, IndexPath, Element) -> UICollectionViewCell
public typealias SupplementaryViewFactory = (CollectionViewItemsController<CollectionType>, UICollectionView, String, IndexPath, CollectionType.Element) -> UICollectionReusableView
public typealias CellConfig<Element, Cell> = (Cell, IndexPath, Element) -> Void

private let cellFactory: CellFactory<Element>
Expand All @@ -31,6 +32,8 @@ public class CollectionViewItemsController<CollectionType>: NSObject, UICollecti

/// A fallback data source to implement custom logic like indexes, dragging, etc.
public var dataSource: UICollectionViewDataSource?

public var configureSupplementaryView: SupplementaryViewFactory?

// MARK: - Init

Expand Down Expand Up @@ -97,6 +100,13 @@ public class CollectionViewItemsController<CollectionType>: NSObject, UICollecti
public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
cellFactory(self, collectionView, indexPath, collection[indexPath.section][indexPath.row])
}

public func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
guard let configureSupplementaryView = configureSupplementaryView else {
fatalError("Property `configureSupplementaryView` must not be nil when using supplementary views")
}
return configureSupplementaryView(self, collectionView, kind, indexPath, collection[indexPath.section])
}

// MARK: - Fallback data source object
override public func forwardingTarget(for aSelector: Selector!) -> Any? {
Expand Down