Question

我尝试使用某些东西向上移动视图，因为当我走到表单末尾并点击最后一个文本字段时，我无法看到我写的内容，因为键盘出现在文本字段上，所以我发现了一些东西，但是如果我点击视图顶部的文本字段，那么这个将被隐藏在上面，这就是代码：

override func viewDidLoad() {

    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)

}


func keyboardWillShow(notification: NSNotification) {

    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
        self.view.frame.origin.y -= keyboardSize.height
    }

}

func keyboardWillHide(notification: NSNotification) {
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
        self.view.frame.origin.y += keyboardSize.height
    }
}

但是这里还有另一个问题，当我在另一个文本字段中点击两次时，会出现一个黑色的集团。

所以我要做的就是检测文本字段并将键盘放在其下面，然后向上移动文本字段。并检测键盘是否已经在这里不显示黑色区域。但我还没有找到解决办法。

Answer 1

我在我的项目中使用了这段代码：

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(true)

    // Register Keyboard Notification
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}

override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)

    // Remove Keyboard notification observer
    NSNotificationCenter.defaultCenter().removeObserver(self)
}

func keyboardWillShow(notification: NSNotification)
{
    var userInfo = notification.userInfo!
    var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()
    keyboardFrame = self.view.convertRect(keyboardFrame, fromView: nil)

    var contentInset:UIEdgeInsets = self.scrollView.contentInset
    contentInset.bottom = keyboardFrame.size.height - 30 //Set this value (30) according to your code as i have navigation tool bar for next and prev.
    self.scrollView.contentInset = contentInset
}

func keyboardWillHide(notification: NSNotification) {
    let contentInset:UIEdgeInsets = UIEdgeInsetsZero
    self.scrollView.contentInset = contentInset
}

希望它会帮助你!!

Answer 2

添加bool属性self.isKeyBoardUp

在keyboardWillShow中：如果isKeyBoardUp返回，则将其设置为true并执行您的操作。

在keyboardWillHide中：如果不是isKeyBoardUp返回，否则将其设置为false并执行您的操作。

Answer 3

请检查此代码我正在尝试并且可以从

获取此代码

Move textfield when keyboard appears swift

 func keyboardWasShown(notification: NSNotification) {
   var info = notification.userInfo!
   var keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue() 

   UIView.animateWithDuration(0.1, animations: { () -> Void in
    self.bottomConstraint.constant = keyboardFrame.size.height + 20
   })
 }

向上移动键盘上方的文本字段

3 个答案: