iOS开源：ELWaterFallLayout－可定制瀑布流布局 UI 组件

   <h2>ELWaterFallLayout</h2>    <h2>Example</h2>    <p>To run the example project, clone the repo, and run pod install from the Example directory first.</p>    <h2>Requirements</h2>    <h2>Installation</h2>    <p>ELWaterFallLayout is available through CocoaPods. To install</p>    <p>it, simply add the following line to your Podfile:</p>    <pre>  pod "ELWaterFallLayout"</pre>    <h2>Usage</h2>    <pre>  import ELWaterFallLayout</pre>    <pre>  lazy var flowLayout : ELWaterFlowLayout = ELWaterFlowLayout()  collectionView = UICollectionView(frame: CGRect(origin: CGPoint(x: 0, y: 0), size: CGSize(width: self.view.frame.size.width, height: self.view.frame.size.height - 200)) , collectionViewLayout:flowLayout)  collectionView.backgroundColor = UIColor.white  collectionView.delegate = self  collectionView.dataSource = self  self.flowLayout.delegate = self  flowLayout.lineCount = 10//十列  flowLayout.vItemSpace = 10//水平间距10  flowLayout.hItemSpace = 10//水平间距10  flowLayout.hItemSpace = 10//水平间距10  flowLayout.edge = UIEdgeInsets.zero  collectionView.register(TestCollectionViewCell.self, forCellWithReuseIdentifier: "cell")  self.view.addSubview(collectionView)</pre>    <h3>delegate protocol</h3>    <pre>  func el_flowLayout(_ flowLayout: ELWaterFlowLayout, heightForRowAt index: Int) -> CGFloat {  //do something for the cell height  return height  }</pre>    <h2>Result</h2>    <p style="text-align: center;"><img src="https://simg.open-open.com/show/840b1b4467a5a5fb672cddccaacc8bf9.gif"></p>    <h2>Author</h2>    <p><a href="/misc/goto?guid=4959738876500926655" rel="nofollow,noindex">jinqiucheng1006@live.cn</a></p>    <h2>License</h2>    <p>ELWaterFallLayout is available under the MIT license. See the LICENSE file for more info.</p>    <p> </p>    <p>来自：https://github.com/NicolasKim/ELWaterFallLayout</p>    <p> </p>