Swift 编辑具有约束的多个文本字段时移动键盘

我有

UIViewController

，它看起来像这样：

我设置了所有相关的

约束

当键盘显示时，我试图向上移动

UIView

——当我单击下面的

UITextfields

时

我有以下代码：

static func addRemoveKeyboardObserver(addObserver: Bool, keyboardMargin: CGFloat, view: UIView?)
{
    Utils.keyboardMargin = keyboardMargin
    Utils.heightChangingView = view

    if addObserver
    {
        NotificationCenter.default.addObserver(self, selector: #selector(Utils.keyboardWillChange(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(Utils.keyboardWillChange(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(Utils.keyboardWillChange(notification:)), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
    }
    else
    {
        NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
        NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
        NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillChangeFrameNotification, object: nil)

        Utils.keyboardHeight = 0
    }
}

@objc static func keyboardWillChange(notification: Notification)
{
    let userInfo = notification.userInfo!
    let beginFrameValue = (userInfo[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)!
    let beginFrame = beginFrameValue.cgRectValue

    let viewShouldMove = notification.name == UIResponder.keyboardWillShowNotification || notification.name == UIResponder.keyboardWillChangeFrameNotification 

    if Utils.keyboardHeight == 0 { Utils.keyboardHeight = -beginFrame.height + Utils.keyboardMargin }

    let duration:TimeInterval = (userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
    let animationCurveRawNSN = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber
    let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
    let animationCurve:UIView.AnimationOptions = UIView.AnimationOptions(rawValue: animationCurveRaw)

    if let view = Utils.heightChangingView
    {
        view.frame.origin.y = viewShouldMove ? Utils.keyboardHeight : 0
        UIView.animate(withDuration: duration, delay: TimeInterval(0), options: animationCurve,                                               animations: { view.layoutIfNeeded() }, completion: nil)
    }
}

我面临的问题是——

但是，当我单击第二个按钮时，它再次移动，现在看起来是这样的：

我注意到，如果我删除约束，问题就会消失，但是，我确实需要使用约束

---

那么，我缺少什么呢？

您必须为uiview控制器使用scrollview，然后才能使用通知来调整uiview约束

您的UIViewController层次结构应该如下所示

ContainerView-->滚动视图-->内容视图-->现在是您的视图

我建议您在scrollview中的未来动画中使用pod“TPKeyboardAvoiding”，因为对于每个控制器，您都不希望在切换视图时发出通知

---

以下是UIView的链接演示，用于移动

现在您的视图的约束条件是什么。如何为ScrollView、ContentView提供约束我正在获取红色边框线设置容器内的ScrollView，将ScrollView端到端连接到容器，并将其宽度设置为containerview。现在添加contentview将顶部、左侧和右侧约束附加到scrollview，并将contentview宽度设置为等于scrollview。现在您必须为内容视图指定高度，并将底部附加到scrollview末端。希望这有帮助！