ZLCollectionLeftLayout
左对齐的 CollectionView 布局
描述
- 自动从左到右布局 collection cell
- 当将属性 scrollDirection 设置为 .vertical 时,它将自动换行
- 当将属性 scrollDirection 设置为 .horizontal 时,您可能需要设置 collection view 的高度以仅显示一行
安装
cocoapods
- pod 'ZLCollectionLeftLayout'
- 或指定版本:pod 'ZLCollectionLeftLayout', '~> 0.0.3'
下载框架
- 下载仓库。
- 并将 ZLCollectionLeftLayout.swift 文件添加到您的项目中
用法
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import ZLCollectionLeftAlignLayout
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import ZLCollectionLeftLayout
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将 collection view 的 collectionViewLayout 设置为 ZLCollectionLeftLayout 的一个实例
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private lazy var collectionView: UICollectionView = { // instance ZLCollectionLeftLayout let defaultLayout = ZLCollectionLeftLayout() defaultLayout.minimumLineSpacing = 10.0 defaultLayout.minimumInteritemSpacing = 10.0 defaultLayout.scrollDirection = .vertical defaultLayout.sectionInset = UIEdgeInsets(top: 10.0, left: 10.0, bottom: 20.0, right: 10.0) // set collectionViewLayout to a instance of ZLCollectionLeftLayout let collectionView = UICollectionView(frame: .zero, collectionViewLayout: defaultLayout) collectionView.backgroundColor = .magenta collectionView.showsVerticalScrollIndicator = false return collectionView }()
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实现方法
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func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let w = CGFloat.random(in: 20.0 ... 50.0) return CGSize(width: 30.0 + w, height: 25.0) }
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