Question

我使用以下方法移动我的＆＃39; UITextView＆＃39;当用户点击它时。但这适用于iPhone 7和iPhone X，但是当我在iPhone 6,5s上试用它时，textView并没有向上移动。请帮我正确地移动键盘。

extension UIViewController {
    func startAvoidingKeyboard() {
        NotificationCenter.default.addObserver(self, selector: #selector(_onKeyboardFrameWillChangeNotificationReceived(_:)), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
    }

    func stopAvoidingKeyboard() {
        NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
    }

    @objc private func _onKeyboardFrameWillChangeNotificationReceived(_ notification: Notification) {
        if #available(iOS 11.0, *) {
            guard let userInfo = notification.userInfo,
            let keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else {    
            return
                }

            let keyboardFrameInView = view.convert(keyboardFrame, from: nil)
            let safeAreaFrame = view.safeAreaLayoutGuide.layoutFrame.insetBy(dx: 0, dy: -additionalSafeAreaInsets.bottom)
            let intersection = safeAreaFrame.intersection(keyboardFrameInView)

            let animationDuration: TimeInterval = (notification.userInfo?[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
            let animationCurveRawNSN = notification.userInfo?[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
            let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIViewAnimationOptions.curveEaseInOut.rawValue
            let animationCurve = UIViewAnimationOptions(rawValue: animationCurveRaw)

            UIView.animate(withDuration: animationDuration, delay: 0, options: animationCurve, animations: {
                self.additionalSafeAreaInsets.bottom = intersection.height
                self.view.layoutIfNeeded()
            }, completion: nil)
        }
    }
}

Answer 1

在iOS 11及更高版本中，您的代码运行正常，但对于早期版本，您应该使用NSNotification.Name.UIKeyboardDidChangeFrame代替NSNotification.Name.UIKeyboardWillChangeFrame

Answer 2

请检查iPhone 6,5s的版本。

只有在版本等于11.0或更高版本时才能使用

Answer 3

你为什么这样做？我建议每次触摸'UITextView'时使用约束动画为约束设置动画（以便它移动），你可以阅读我给别人的关于如何设置约束动画的答案（here）

你现在听说过CocoaPods吗？您可以使用一些有用的库来为您的应用设置动画（例如HERO）。

如果您不知道什么是可可豆荚或如何安装，请查看此视频（Cocoa Pods Tutorial - How to install and setup Cocoa Pods）

有时候你只想在一种类型的设备上做特定的动画或特定的事情（无论你的头脑中是什么）（只说iPhone 8而不是别的）;为此你可以使用Device Kit我建议你阅读它

希望我能够提供帮助

谢谢

Answer 4

func keyboardWillShow(_ notification: Notification)
{
    DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
        let info: NSDictionary = notification.userInfo! as NSDictionary
        let keyboardHeight = ((info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size.height)! + self.extraPadding

        let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardHeight, 0.0)
        self.scrollView?.contentInset = contentInsets
        self.scrollView?.scrollIndicatorInsets = contentInsets
    }
}

func keyboardWillBeHidden(_ notification: Notification)
{
    let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, 0.0, 0.0)
    scrollView?.contentInset = contentInsets
    scrollView?.scrollIndicatorInsets = contentInsets
}

这是我在显示/隐藏键盘时调整滚动视图的内容区域的方法。您应该能够以相同的方式调整UITextView的内容区域。

在iOS 11上移动键盘问题iPhone 6是早期型号

4 个答案: