ios - 当键盘快速出现时滚动 UITextView

Question

我现在面临的问题是UIScrollView中有一个UITextField。当我单击 UITextField 时，我正在显示带有 UIToolBar 的 UIPickerView。当 PickerView 出现时，我需要将 UITextField 向上移动。

这是我的设计

这是我的代码

 func keyboardWillShow(notification: NSNotification)
{
    let userInfo = notification.userInfo
    if let info = userInfo
    {
        let animationDurationObject =
        info[UIKeyboardAnimationDurationUserInfoKey] as NSValue

        let keyboardEndRectObject =
        info[UIKeyboardFrameEndUserInfoKey] as NSValue

        var animationDuration = 0.0
        var keyboardEndRect = CGRectZero

        animationDurationObject.getValue(&animationDuration)
        keyboardEndRectObject.getValue(&keyboardEndRect)

        let window = UIApplication.sharedApplication().keyWindow

        keyboardEndRect = view.convertRect(keyboardEndRect, fromView: window)

        let intersectionOfKeyboardRectAndWindowRect =
        CGRectIntersection(view.frame, keyboardEndRect);

        UIView.animateWithDuration(animationDuration, animations: {[weak self] in

            self!.scrollView.contentInset = UIEdgeInsets(top: 0,
                left: 0,
                bottom: intersectionOfKeyboardRectAndWindowRect.size.height,
                right: 0)
            self?.scrollView.scrollRectToVisible(self!.activeTextField.frame, animated: true)
        })
    }
}

func keyboardWillHide(notification: NSNotification)
{
    let userInfo = notification.userInfo

    if let info = userInfo{
        let animationDurationObject =
        info[UIKeyboardAnimationDurationUserInfoKey]
            as NSValue

        var animationDuration = 0.0;

        animationDurationObject.getValue(&animationDuration)

        UIView.animateWithDuration(animationDuration, animations: {
            [weak self] in
            self?.scrollView.contentInset = UIEdgeInsetsZero
            self?.scrollView.scrollIndicatorInsets = UIEdgeInsetsZero
        })
    }
}

func textFieldShouldReturn(textField: UITextField) -> Bool
{
    textField.resignFirstResponder()
    return true
}

func textFieldShouldBeginEditing(textField: UITextField) -> Bool
{
    var returnVal = true
    self.activeTextField = textField
    if textField == self.pickerTextField
    {
        returnVal = false
        var yval:CGFloat = self.view.bounds.size.height - 206
        self.pickerContainerView.frame = CGRectMake(0, yval, self.view.bounds.size.width, self.pickerContainerView.frame.size.height)
        self.pickerContainerView.hidden = false
        self.view.addSubview(self.pickerContainerView)
    }
    return returnVal
}

func textFieldDidEndEditing(textField: UITextField) {
    self.activeTextField = nil
    textField.resignFirstResponder()
}

当我单击其他 TextField 时，这些 TextField 在出现键盘时上升。但是PickerTextField怎么办

关于 UItextView 的任何想法

谢谢。

Answer 1

swift 3 版本:

func textViewDidBeginEditing(_ textView: UITextView) {
    let scrollPoint : CGPoint = CGPoint.init(x:0, y:textView.frame.origin.y)
    self.scrollView.setContentOffset(scrollPoint, animated: true)
}

func textViewDidEndEditing(_ textView: UITextView) {
    self.scrollView.setContentOffset(CGPoint.zero, animated: true)
}