ios - 键盘隐藏早于查看

Question

键盘作为 subview 添加到 Collection View Controller 底部的容器中，但是当尝试隐藏它时，键盘加载似乎比增加 View 的大小更快(键盘按下后会出现一个黑色的 View )打算躲起来)。另外，当一天第一次运行该项目时，键盘不会显示，直到我按“command + K”，然后一个黑暗的 View ，因为键盘的大小出现在键盘上方和输入下方。

    @objc func handleShowKeyboard(_ notification: Notification) {
        if let keyboaradSize: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue? {
            let keyboardFram = keyboaradSize.cgRectValue
            UIView.animate(withDuration: 0.5, delay: 0, options: .curveEaseOut, animations: {
                self.view.frame.origin.y -= self.view.safeAreaInsets.bottom
                self.view.frame.origin.y -= keyboardFram.height
                self.view.layoutIfNeeded()

            }) { (completion) in

            }
        }
    }

    @objc func handleHideKeyboard(_ notification: Notification) {
        if let keyboaradSize: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue? {
            let keyboardFram = keyboaradSize.cgRectValue
            UIView.animate(withDuration: 0.5, delay: 0, options: .curveEaseOut, animations: {

                self.view.frame.origin.y += self.view.safeAreaInsets.bottom
                self.view.frame.origin.y += keyboardFram.height
                self.view.layoutIfNeeded()

            }) { (completion) in

            }
        }
    }

Answer 1

阅读此 key

UIKeyboardAnimationDurationUserInfoKey

值并将其用作动画持续时间

<小时/>

guard let userInfo = notification.userInfo else {
    return
} 

guard let duration = userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double,
    let curve =  userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? UInt else {

        return
}
UIView.animate(withDuration: duration, delay: 0, options: [UIView.AnimationOptions(rawValue: curve)], animations: {
   ///
}) { (completed) in

}