ios - 当屏幕上出现 View 时，如何使键盘将 View 向上推？ Xcode Swift

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How can I make a UITextField move up when the keyboard is present - on starting to edit?
（92个答案）
三年前关闭。
所以我有一个包含文本字段的视图，但是文本字段在底部。当我单击键盘时，它会弹出并覆盖文本字段，这是我的问题。我在想，当键盘出现时，是否有可能将视图的其余部分向上推？

最佳答案

您可以注册视图控制器，以便在键盘即将显示时收到通知，然后将视图向上推。

class ViewController: UIViewController {

var keyboardAdjusted = false
var lastKeyboardOffset: CGFloat = 0.0

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}

override func viewDidDisappear(animated: Bool) {
    super.viewDidDisappear(animated)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}

func keyboardWillShow(notification: NSNotification) {
    if keyboardAdjusted == false {
        lastKeyboardOffset = getKeyboardHeight(notification)
        view.frame.origin.y -= lastKeyboardOffset
        keyboardAdjusted = true
    }
}

func keyboardWillHide(notification: NSNotification) {
    if keyboardAdjusted == true {
        view.frame.origin.y += lastKeyboardOffset
        keyboardAdjusted = false
    }
}

func getKeyboardHeight(notification: NSNotification) -> CGFloat {
    let userInfo = notification.userInfo
    let keyboardSize = userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue
    return keyboardSize.CGRectValue().height
}

}

关于ios - 当屏幕上出现 View 时，如何使键盘将 View 向上推？ Xcode Swift ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/35561977/