ios - Swift 中的自定义单元格 UICollectionView

Question

我正在尝试为我的 collectionView 中的每个索引项创建不同的单元格，并且我试图将它们向下转换为它们各自的单元格以访问它们的变量。下面的代码输出此错误“无法将类型‘LiveCell.Type’的值分配给类型‘UICollectionViewCell’”

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let identifier: String
    let cellName: UICollectionViewCell

    if indexPath.item == 1 {
        identifier = LiveCellId
        cellName = LiveCell
    } else if indexPath.item == 2 {
        identifier = LiveCellId
        cellName = LiveCell
    } else {
        identifier = FeedCellId
        cellName = FeedCell
    }

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: identifier, for: indexPath) as! cellName //Trying to downcast cell from the variable called cellName
    cell.homeController = self

    return cell
}

有解决办法吗？提前致谢

Answer 1

试试这个:-

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let identifier: String
    let cellName: UICollectionViewCell?

    if indexPath.item == 1 {
        identifier = LiveCellId 
        cellName = LiveCell as? UICollectionViewCell
    } else if indexPath.item == 2 {
        identifier = LiveCellId
        cellName = LiveCell as? UICollectionViewCell
    } else {
        identifier = FeedCellId
        cellName = FeedCell as? UICollectionViewCell
    }

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: identifier, for: indexPath) as! cellName //Trying to downcast cell from the variable called cellName
    cell.homeController = self

    return cell
}