ios - 如何在 Xamarin iOS 中为 UITableViewCell 从底部到顶部的过渡设置动画？

Question

如何在 Xamarin iOS 原生中为 UITableViewCell 从底部到顶部的过渡设置动画？

大家好 Xamarin iOS native 社区，我正在寻找一种方法来为 UITableView 中的 UITableViewCell 设置动画，创建从底部到顶部的过渡，并为任何单元格提供淡入淡出效果。

因为我找到的所有示例都是用 Swift 编写的，所以我自己解决了这个问题，我将把解决方案分享给社区。

Answer 1

Swift 4 和修复滚动问题:

private var finishedLoadingInitialTableCells = false
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

    var lastInitialDisplayableCell = false

    //change flag as soon as last displayable cell is being loaded (which will mean table has initially loaded)
    if favorites.itemes.count > 0 && !finishedLoadingInitialTableCells {
        if let indexPathsForVisibleRows = tableView.indexPathsForVisibleRows,
            let lastIndexPath = indexPathsForVisibleRows.last, lastIndexPath.row == indexPath.row {
            lastInitialDisplayableCell = true
        }
    }

    if !finishedLoadingInitialTableCells {

        if lastInitialDisplayableCell {
            finishedLoadingInitialTableCells = true
        }

        //animates the cell as it is being displayed for the first time
        do {
            let startFromHeight = tableView.frame.height
            cell.layer.transform = CATransform3DMakeTranslation(0, startFromHeight, 0)
            let delay = Double(indexPath.row) * 0.2

            UIView.animate(withDuration: 0.7, delay: delay, options: UIViewAnimationOptions.transitionFlipFromBottom, animations: {
                do {
                    cell.layer.transform = CATransform3DIdentity
                }
            }) { (success:Bool) in

            }
        }
    }
}