鍵盤顯示時使UITextField動畫化

Question

我已經在NSNotificationCenter中注冊了兩個觀察者，keyboardWillShow：和keyboardWillHide：

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

在這兩種方法中，當我嘗試對包含UITextView的UIView進行動畫處理時，它都會跳轉到我要對其進行動畫處理的幀，然后再動畫回原始位置。 我在touchesBegan方法中嘗試了相同的動畫代碼來對其進行測試，並且在那里效果很好（對我實際上將其設置為的新幀進行動畫處理，而不是跳動並動畫回到原始位置）。

func keyboardWillShow(notification: NSNotification) {
    if let endFrame = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue() {
        UIView.animateWithDuration(1.0, animations: { () -> Void in
            self.footerView.center = CGPointMake(self.footerView.center.x, self.footerView.center.y - endFrame.size.height)
        })
    }
}

我很沮喪 鍵盤通知會以某種方式影響新動畫嗎？

Answer 1

您將必須調用這兩種方法來上下動畫視圖。

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
@try
{
    if (textField == (UITextField *)[self.view viewWithTag:TEXTFIELD_MOBILE_TAG])
    {
        CGRect selfframe = CGRectMake([self.view viewWithTag:VIEW_PARENT_TAG].frame.origin.x, [self.view viewWithTag:VIEW_PARENT_TAG].frame.origin.y - 80, [self.view viewWithTag:VIEW_PARENT_TAG].frame.size.width, [self.view viewWithTag:VIEW_PARENT_TAG].frame.size.height);
        [UIView animateWithDuration:0.3 animations:^{ [self.view viewWithTag:VIEW_PARENT_TAG].frame = selfframe;}];
        [textField becomeFirstResponder];
    }

}
@catch (NSException *exception)
{
    NSLog(@"Error Occured in SignUpViewController :: textViewDidBeginEditing :: %@",[exception description]);
}

}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
@try
{
    if (textField == (UITextField *)[self.view viewWithTag:TEXTFIELD_MOBILE_TAG])
    {
        CGRect selfframe = CGRectMake([self.view viewWithTag:VIEW_PARENT_TAG].frame.origin.x, [self.view viewWithTag:VIEW_PARENT_TAG].frame.origin.y + 80, [self.view viewWithTag:VIEW_PARENT_TAG].frame.size.width, [self.view viewWithTag:VIEW_PARENT_TAG].frame.size.height);
        [UIView animateWithDuration:0.3 animations:^{ [self.view viewWithTag:VIEW_PARENT_TAG].frame = selfframe;}];
        [textField resignFirstResponder];
    }
}
@catch (NSException *exception)
{
    NSLog(@"error Occured in SignUpViewController :: textViewDidEndEditing :: %@",[exception description]);
}

}