Swift + StoryBoard + CollectionV

具体的代码如下：

import UIKit

let SCREEN_WIDTH = UIScreen.main.bounds.width
class ViewController: UIViewController {
    @IBOutlet weak var PictureCollectionView: UICollectionView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        
        PictureCollectionView.delegate = self
        PictureCollectionView.dataSource = self
    }
}

//相当于Android里面的适配器
extension ViewController: UICollectionViewDelegate, UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 22
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PictureCollectionCell", for: indexPath) as! PictureCollectionCell
        cell.testText.text = String(indexPath.row)
        
        
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        //条目点击事件
        NSLog("点击了item" + String(indexPath.row))
    }
}

//相当于Android里面的ViewHolder，获取列表Item控件，需要在StoryBorad布局CollectionViewCell中设置绑定
class PictureCollectionCell: UICollectionViewCell {
    @IBOutlet weak var testText: UILabel!
}

//设置布局配置，需要在CollectionView中设置自定义布局宽高，间距，滑动方式
class CustomCollecionViewFlowLayout: UICollectionViewFlowLayout {
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        scrollDirection = .horizontal
        sectionInset = UIEdgeInsets(top: 16, left: 20, bottom: 16, right: 20)
        itemSize = CGSize(width: SCREEN_WIDTH/2 - 25, height: SCREEN_WIDTH/2 - 25)
    }
}

StoryBoard使用注意点：
1.设置自定义布局

设置自定义布局.png

2.关联控件

关联控件1.png
关联控件2.png