隱藏后迅速調高鍵盤高度

Question

我正在開發一個聊天應用程序（想想whatsapp）。 在一個視圖控制器中，用戶將選擇要發送的照片，然后在文本字段中輸入其消息。 文本字段輸入第一次隨鍵盤高度移動。 很好 現在，如果用戶選擇了錯誤的圖像，然后單擊並從圖庫或照片中選擇了另一圖像，則文本字段不會隨鍵盤移動。

我的代碼是：

NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)

func keyboardWillShow(_ note: Notification) {

    if let keyboardSize = note.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? CGRect {

        let keyboardHeight = keyboardSize.height
        let duration = (note.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! Float)
        let curve = (note.userInfo![UIKeyboardAnimationCurveUserInfoKey] as! CInt)

        //----------------Image Attachment----------------
        let imageX = self.imgBackgroundSend.frame.origin.x
        let imageY = CGFloat(keyboardHeight)
        let imageWidth = self.imgBackgroundSend.frame.size.width
        let imageHeight = self.imgBackgroundSend.frame.size.height

        self.imgBackgroundSend.frame = CGRect(x: imageX, y: imageY, width: imageWidth, height: imageHeight)

        UIView.beginAnimations(nil, context: nil)
        UIView.setAnimationBeginsFromCurrentState(true)
        UIView.setAnimationDuration(CDouble(duration))
        UIView.setAnimationCurve(UIViewAnimationCurve(rawValue: Int(CInt(curve)))!)
        UIView.commitAnimations()

        let offsetScrollPoint = CGPoint(x: CGFloat(0), y: CGFloat(keyboardHeight))
        self.scrlViewImageText.contentOffset = offsetScrollPoint
    }

}


func keyboardWillHide(_ note: Notification) {

    if let keyboardSize = (note.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
        let keyboardHeight = keyboardSize.height

        let duration = (note.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! Double)
        let curve = (note.userInfo![UIKeyboardAnimationCurveUserInfoKey] as! CInt)

        //----------------Image Attachment----------------
        let imageX = self.imgBackgroundSend.frame.origin.x
        let imageY = self.scrlViewImageText.center.y - (self.imgBackgroundSend.frame.size.height/2)
        print(keyboardHeight)

        let imageWidth = self.imgBackgroundSend.frame.size.width
        let imageHeight = self.imgBackgroundSend.frame.size.height

        self.imgBackgroundSend.frame = CGRect(x: imageX, y: imageY, width: imageWidth, height: imageHeight)

        UIView.beginAnimations(nil, context: nil)
        UIView.setAnimationBeginsFromCurrentState(true)
        UIView.setAnimationDuration(CDouble(duration))
        UIView.setAnimationCurve(UIViewAnimationCurve(rawValue: Int(CInt(curve)))!)
        UIView.commitAnimations()

        let offsetScrollPoint = CGPoint(x: CGFloat(0), y: CGFloat(0))
        self.scrlViewImageText.contentOffset = offsetScrollPoint
    }

`

我只是一個初級開發人員，正在努力使這個問題盡可能簡單

Answer 1

Aditya Srivastava是正確的-用UIKeyboardFrameEndUserInfoKey更改UIKeyboardFrameBeginUserInfoKey是一種享受。

非常感謝。

順便說一句-我也想使UITextView向上而不是向下擴展，因此它確實位於鍵盤下方。 我確實使用了此代碼段。

    var frame: CGRect = txtMessage.frame
    frame.origin.y = frame.maxY - txtMessage.contentSize.height
    frame.size.height = txtMessage.contentSize.height
    txtMessage.frame = frame