编辑带有约束的多个文本字段时移动键盘 swift

Question

我有 UIViewController 看起来像这样：

相关的我都设置了constraints.

我试图在键盘出现时向上移动 UIView - 当我点击下面的 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，当我点击第二个时，它又移动了，现在它看起来像这样：

我注意到如果删除约束，问题就会消失，但是，我确实需要使用约束。

那么，我在这里缺少什么？

Answer 1

您必须为您的 uiview 控制器使用 scrollview，然后您可以使用通知来调整您的 uiview 约束。

你的 UIViewController 层次结构应该是这样的

ContainerView --> ScrollView --> 内容视图 --> 现在是您的视图。

我建议您将 pod 'TPKeyboardAvoiding' 用于滚动视图中的未来动画，因为对于每个控制器，您不想将通知用于移动 UIView。

这是 link UIView 移动演示 https://github.com/Vasu05/ScrollViewExample

编辑带有约束的多个文本字段时移动键盘 swift

Moving keyboard when editing multiple textfields with constraints swift

constraints

uitextfield

uiresponder

swift