73 lines
2.9 KiB
Swift
73 lines
2.9 KiB
Swift
//
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// Copyright (c) 2023 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import UIKit
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open class CollectionTableViewCell<CollectionView: UICollectionView>: ContainerTableViewCell<CollectionView> {
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private var contentSizeObservation: NSKeyValueObservation?
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open override func bindViews() {
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super.bindViews()
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if #available(iOS 16, *) {
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contentSizeObservation = wrappedView.observe(\.contentSize,
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options: [.new]) { collectionView, change in
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if let contentSize = change.newValue, !contentSize.equalTo(collectionView.bounds.size) {
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self.invalidateIntrinsicContentSize()
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}
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}
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}
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}
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// MARK: - UIView Overrides
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open override func systemLayoutSizeFitting(_ targetSize: CGSize,
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withHorizontalFittingPriority horizontalFittingPriority: UILayoutPriority,
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verticalFittingPriority: UILayoutPriority) -> CGSize {
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if #unavailable(iOS 16.0.0) {
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wrappedView.setNeedsLayout()
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wrappedView.layoutIfNeeded()
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}
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let cachedCollectionFrame = wrappedView.frame
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wrappedView.frame.size.width = targetSize.width - contentInsets.left - contentInsets.right
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let collectionContentHeight = wrappedView.collectionViewLayout.collectionViewContentSize.height
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wrappedView.frame = cachedCollectionFrame
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return CGSize(width: targetSize.width,
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height: collectionContentHeight + contentInsets.top + contentInsets.bottom)
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}
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// MARK: - Open methods
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open func createCollectionLayout() -> UICollectionViewLayout {
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UICollectionViewFlowLayout()
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}
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open override func createView() -> CollectionView {
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CollectionView(frame: .zero, collectionViewLayout: createCollectionLayout())
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}
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}
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