CollectionView 内容视图在 viewdidload 时不更新/刷新

Question

我想在每个 collectionviewcell 中包含 this progression view (pod)。当我运行应用程序时，进度为 0%，它应该动画到 100% 以进行测试，但它保持在 0%。只有当我上下滑动（刷新单元格？？？）时，它才会开始动画到 100%。这是我的代码：

    import UIKit
import MKRingProgressView

class myCollectionViewCell: UICollectionViewCell {
    @IBOutlet weak var ringView: UIView!
    let ringsize = 150
    var ringProgressView = RingProgressView()
    override func layoutSubviews() {
         ringProgressView = RingProgressView(frame: CGRect(x: 0, y: 0, width: ringsize, height: ringsize))
        ringProgressView.startColor = .red
        ringProgressView.endColor = .magenta
        ringProgressView.ringWidth = CGFloat(ringsize) * 0.15
        ringProgressView.progress = 0.0
        ringProgressView.shadowOpacity = 0.5
        ringView.addSubview(ringProgressView)
    }
}

extension myCollectionViewCell{
    func setProgress(progress: Double){
        UIView.animate(withDuration: 0.5){
            self.ringProgressView.progress = progress
        }
    }
}


    import UIKit

private let reuseIdentifier = "Cell"

class myCollectionViewController: UICollectionViewController {

    @IBOutlet var myCollectionView: UICollectionView!
    var cellColor = true
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }


    override func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }


    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of items
        return 7
    }

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! myCollectionViewCell
    
        cell.setProgress(progress: 1.0)
        return cell
    }
}

有人能帮我吗？谢谢！！

Answer 1

在 viewDidAppear 方法中调用 myCollectionView.reloadData()。

CollectionView 内容视图在 viewdidload 时不更新/刷新

CollectionView Content View does not update/ refresh when viewdidload

xcode

ios

uicollectionview

swift