Swift collectionViewCells 没有显示 [英] Swift collectionViewCells are not showing

问题描述

我有这个 Swift 代码`

I have got this Swift code `

let cellId="cellId"

class FeedController: UICollectionViewController{
override func viewDidLoad() {
    super.viewDidLoad()

    navigationItem.title = "Centill"

    collectionView?.reloadData()
    collectionView?.backgroundColor = UIColor(white: 0.95, alpha: 1)
    collectionView?.register(FeedCell.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);
    cell.backgroundColor = .yellow
    return cell
}

}

class FeedCell: 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 = .yellow
}
}

`但不幸的是我的单元格没有显示.它只显示导航栏和背景颜色.我的代码可能是什么问题?

` But unfortunately my cells are not showing.It only shows navigation bar and background color.what may be the problem with my code?

推荐答案

试试看.你在类中添加

UICollectionViewDataSource and UICollectionVIewDelegate.

这篇关于Swift collectionViewCells 没有显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！