如何在键盘出现时对UIView进行排序？

// 监听键盘出现和消失的通知
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)

// 获取需要排序的UIView集合
let viewsToSort = [view1, view2, view3]

// 计算排序后的位置
func calculateSortedFrames(keyboardHeight: CGFloat) -> [CGRect] {
    // 根据需求进行排序算法的实现
    // 这里使用简单的垂直排序，将UIView从上到下依次排列
    var sortedFrames: [CGRect] = []
    var y = keyboardHeight // 初始位置为键盘的高度
    for view in viewsToSort {
        let frame = CGRect(x: view.frame.origin.x, y: y, width: view.frame.size.width, height: view.frame.size.height)
        sortedFrames.append(frame)
        y += view.frame.size.height // 更新下一个UIView的位置
    }
    return sortedFrames
}

// 更新UIView的位置
func updateViewFrames(frames: [CGRect]) {
    for (index, view) in viewsToSort.enumerated() {
        view.frame = frames[index]
    }
}

// 键盘出现时的处理
@objc func keyboardWillShow(_ notification: Notification) {
    if let keyboardFrame = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect,
       let animationDuration = notification.userInfo?[UIResponder.keyboardAnimationDurationUserInfoKey] as? TimeInterval {
        let sortedFrames = calculateSortedFrames(keyboardHeight: keyboardFrame.size.height)
        UIView.animate(withDuration: animationDuration) {
            updateViewFrames(frames: sortedFrames)
        }
    }
}

// 键盘消失时的处理
@objc func keyboardWillHide(_ notification: Notification) {
    if let animationDuration = notification.userInfo?[UIResponder.keyboardAnimationDurationUserInfoKey] as? TimeInterval {
        // 恢复原始位置
        UIView.animate(withDuration: animationDuration) {
            updateViewFrames(frames: originalFrames)
        }
    }
}