防止键盘重叠UIButton/UITextField

Question

我一直在阅读Apple提供的文本编程指南,通过以下网址:

https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html

我试图阻止按钮和textFields被键盘重叠.

当我按照指南的说明粘贴清单5-1(下面列出)中的代码时,我收到的错误如下:

" Use of unidentified identifier 'scrollView'; Did you mean 'UIScrollView' ? "

和

" Property 'contentsInset' not found in 'scrollView' "



// Call this method somewhere in your view controller setup code.
- (void)registerForKeyboardNotifications
{
    [[NSNotificationCenter defaultCenter] addObserver:self
            selector:@selector(keyboardWasShown:)
            name:UIKeyboardDidShowNotification object:nil];

   [[NSNotificationCenter defaultCenter] addObserver:self
             selector:@selector(keyboardWillBeHidden:)
             name:UIKeyboardWillHideNotification object:nil];

}

// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
    scrollView.contentInset = contentInsets;
    scrollView.scrollIndicatorInsets = contentInsets;

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your app might not need or want this behavior.
    CGRect aRect = self.view.frame;
    aRect.size.height -= kbSize.height;
    if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
        [self.scrollView scrollRectToVisible:activeField.frame animated:YES];
    }
}

// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    scrollView.contentInset = contentInsets;
    scrollView.scrollIndicatorInsets = contentInsets;
}

Answer 1

尝试此代码将解决您的问题，替换TextView为TextField

-(void)textViewDidBeginEditing:(UITextView *)textView{

    [self animateTextFild:textView up:YES];
}

-(void)textViewDidEndEditing:(UITextView *)textView{

    [self animateTextFild:textView up:NO];
    [textView resignFirstResponder];
}

-(void) animateTextFild:(UITextView *)textField up:(BOOL)up{

    int animatedDistance;

    int moveUpValue = textField.frame.origin.y+ textField.frame.size.height;

    UIInterfaceOrientation orientation =
    [[UIApplication sharedApplication] statusBarOrientation];

    if (orientation == UIInterfaceOrientationPortrait ||
        orientation == UIInterfaceOrientationPortraitUpsideDown)
    {

        animatedDistance = 216-(730-moveUpValue);
    }
    else
    {
        animatedDistance = 162-(520-moveUpValue);
    }

    if(animatedDistance>0)
    {
        const int movementDistance = animatedDistance;

        const float movementDuration = 0.3f;

        int movement = (up ? -movementDistance : movementDistance);

        [UIView beginAnimations: nil context: nil];

        [UIView setAnimationBeginsFromCurrentState: YES];

        [UIView setAnimationDuration: movementDuration];

        myView.frame = CGRectOffset(ViewEdit.frame, 0, movement);

        [UIView commitAnimations];
    }
}