ios - 如果只选择了某个 textView 如何移动 View

Question

您好，我正在使用此代码在选择 textView 时移动我的 View ，这是为了确保我的 texView 在键盘弹出时可见。

override func viewDidLoad() {
    super.viewDidLoad() NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: self.view.window)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: self.view.window)   
}


func keyboardWillHide(sender: NSNotification) {

    let userInfo: [NSObject : AnyObject] = sender.userInfo!
    let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
    self.view.frame.origin.y += keyboardSize.height

}

func keyboardWillShow(sender: NSNotification) {

    let userInfo: [NSObject : AnyObject] = sender.userInfo!

    let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
    let offset: CGSize = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue.size

    if keyboardSize.height == offset.height {
        if self.view.frame.origin.y == 0 {
            UIView.animateWithDuration(0.1, animations: { () -> Void in
                self.view.frame.origin.y -= keyboardSize.height
            })
        }
    } else {
        UIView.animateWithDuration(0.1, animations: { () -> Void in
            self.view.frame.origin.y += keyboardSize.height - offset.height
        })
    }
    print(self.view.frame.origin.y)

}


override func viewWillDisappear(animated: Bool) {

    NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: self.view.window)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: self.view.window)

}

如果底部的 textView 被选中，我如何才能移动 View ？因为目前，如果您选择最上面的 textView，它会将其一半移出屏幕。

非常感谢任何帮助，提前致谢。

Answer 1

在通知回调中检查 bottomTextView.isFirstResponder() 并仅在其为真时才移动 View 。否则不要移动 View 。