swift - 如何让细胞变大几秒钟？

Question

我有一个包含一些单元格的 UICollection，我希望每个单元格都将被“选中”- 将大小更改为更大并更改背景颜色，并在恢复正常之前保持这种状态几秒钟。我在网上找不到类似的东西。

Answer 1

您可以在 CollectionView 的委托(delegate)上尝试此代码:

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let scale: CGFloat = 1.2
    let animationDuration = 0.5
    let delay = 4.0
    UIView.animate(withDuration: animationDuration, animations: {
        collectionView.cellForItem(at: indexPath)?.transform = CGAffineTransform(scaleX: scale, y: scale)
    }) { (c) in
        UIView.animate(withDuration: animationDuration, delay: delay, options: .curveLinear, animations: {
            collectionView.cellForItem(at: indexPath)?.transform = .identity
        })
    }
}