54 lines
1.7 KiB
Swift
54 lines
1.7 KiB
Swift
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// Copyright © 2021 Metabolist. All rights reserved.
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import UIKit
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final class AnnouncementReactionsCollectionView: UICollectionView {
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init() {
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super.init(frame: .zero, collectionViewLayout: Self.layout())
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backgroundColor = .clear
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isScrollEnabled = false
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showsVerticalScrollIndicator = false
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showsHorizontalScrollIndicator = false
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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if bounds.size != intrinsicContentSize {
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invalidateIntrinsicContentSize()
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}
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}
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override var intrinsicContentSize: CGSize {
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CGSize(width: UIView.noIntrinsicMetric, height: max(contentSize.height, .minimumButtonDimension))
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}
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}
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private extension AnnouncementReactionsCollectionView {
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static func layout() -> UICollectionViewLayout {
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let itemSize = NSCollectionLayoutSize(
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widthDimension: .estimated(.minimumButtonDimension),
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heightDimension: .estimated(.minimumButtonDimension))
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let item = NSCollectionLayoutItem(layoutSize: itemSize)
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let groupSize = NSCollectionLayoutSize(
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widthDimension: .fractionalWidth(1),
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heightDimension: .estimated(.minimumButtonDimension))
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let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item])
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group.interItemSpacing = .flexible(.defaultSpacing)
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let section = NSCollectionLayoutSection(group: group)
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section.interGroupSpacing = .defaultSpacing
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return UICollectionViewCompositionalLayout(section: section)
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}
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}
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