鍵盤高度在 Swift 中無法正常工作

Question

當鍵盤顯示和隱藏時，我使用下面的代碼來調整當前視圖。 當鍵盤顯示代碼工作時，但當它隱藏視圖時，滑動底部保持頂部的黑色空間。 如何解決？

@objc func keyboardWillAppear(notification: Notification){
    if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
        let keyboardRectangle = keyboardFrame.cgRectValue
        let keyboardHeight = keyboardRectangle.height
        self.view.frame.origin.y = -keyboardHeight/2
    }
}

@objc func keyboardWillHide(notification: Notification){
    if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
        let keyboardRectangle = keyboardFrame.cgRectValue
        let keyboardHeight = keyboardRectangle.height
        self.view.frame.origin.y = +keyboardHeight/2
    }
}

Answer 1

您可以轉換視圖而不是分配給原點

@objc func keyboardWillAppear(notification: Notification){
    if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
        let keyboardRectangle = keyboardFrame.cgRectValue
        let keyboardHeight = keyboardRectangle.height
        self.view.transform = CGAffineTransform(translationX: 0, y: -keyboardHeight/2)
    }
}

@objc func keyboardWillHide(notification: Notification){
        self.view.transform = .identity
}