swift - UICollection 单元格在 swift 中混合

Question

我正在尝试生成单元格并将标签放入其中。但是，当我向下滚动时，标签在单元格之间混合在一起。这是我的代码，我正在尝试解决它。

    let lblTitle = UILabel()
    let lblMetro = UILabel()
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    var cell = collectionView.dequeueReusableCell(withReuseIdentifier: "MenuCell", for: indexPath) as? UICustomCollectionViewCell

        if indexPath.row == 0 {
            lblTitle.frame = CGRect(x: 0, y: 0, width: 195, height: 40)
            lblTitle.font = UIFont.systemFont(ofSize: 14)
            lblTitle.textColor = UIColor.white
            lblTitle.backgroundColor =  colorLiteral(red: 0.2122299671, green: 0.4379466176, blue: 0.8993332386, alpha: 1)
            lblTitle.text = "  1”
            cell?.contentView.addSubview(lblTitle)
            }

                if indexPath.row == 1 {
           lblMetro.frame = CGRect(x: 55, y: 290, width: 100, height: 20)
            lblMetro.font = UIFont.boldSystemFont(ofSize: 17)
            lblMetro.textColor =  colorLiteral(red: 0, green: 0.3117707968, blue: 0.5609284043, alpha: 1)
            lblMetro.text = “2”
            cell?.contentView.addSubview(lblMetro)
            }

    return cell ?? UICollectionViewCell()
    }
 }

Answer 1

这里的单元格出队了

var cell = collectionView.dequeueReusableCell(withReuseIdentifier: "MenuCell", for: indexPath) as? UICustomCollectionViewCell

因此您可能会得到一个带有先前添加的标签的 1，您需要在出队后清除它们，这会很困惑，但最好将 vc 的标签与单元格 1 隔离，因此将它们添加到单元格配置中或使它们成为 socket , 删除给他们一个标签并在上面的行之后做

cell.contentView.subviews.forEach { 
   if $0.tag == 200 {
      $0.removeFromSuperview()
   }
}