UICollectionViewCell中的UICollectionView

Question

我有兴趣将collectionview作为集合视图单元的一部分,但由于某种原因无法弄清楚如何完成.我将在哪里实现细胞收集视图的必要方法？

Answer 1

还有那个灰沟写了一篇文章,介绍如何把一个UICollectionView内部的UITableViewCell.在内部使用它时基本上是相同的想法UICollectionViewCell.

Answer 2

一切都以编程方式完成。没有情节提要。

我在UICollectionViewCell中添加了一个UICollectionView。我还将展示如何在创建的UICollectionView内再次添加UICollectionViewCell以获得此结果

import UIKit

class CategoryCell: UICollectionViewCell, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {

    private let cellId = "cell"

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupViews()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    let appsCollectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
        return collectionView
    }()

    func setupViews() {
        backgroundColor = .blue

        addSubview(appsCollectionView)

        appsCollectionView.delegate = self
        appsCollectionView.dataSource = self
        appsCollectionView.register(AppCell.self, forCellWithReuseIdentifier: cellId)

        addConstrainstWithFormat("H:|-8-[v0]-8-|", views: appsCollectionView)
        addConstrainstWithFormat("V:|[v0]|", views: appsCollectionView)

    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 5
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath)
        return cell
    }
}

class AppCell: UICollectionViewCell {
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupViews()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func setupViews(){
        backgroundColor = .red
    }
}

我的UICollectionViewController

import UIKit

class FeaturedAppsController: UICollectionViewController, UICollectionViewDelegateFlowLayout {

    let cellId = "cell"

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        collectionView?.backgroundColor = .white
        collectionView?.register(CategoryCell.self, forCellWithReuseIdentifier: cellId)
    }

    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 3
    }

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath)
        return cell
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(view.frame.width, 150)
    }

}

可以找到完整的解释，并由“让我们构建该应用”开发：https : //www.youtube.com/watch?v= Ko9oNhlTwH0&list=PL0dzCUj1L5JEXct3-OV6itP7Kz3tRDmma