Move up keyboard when editing UITextField on iOS9

Question

For my keyboards to move up to uncover UITextField in my iOS app, I used to implement this answer: https://stackoverflow.com/a/6908258/3855618 on iOS7 and 8 and it

Answer 1

Try this code that I have used in my previous projects:

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    [self didBeginEditingIn:textField];
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    [self didEndEditing];
}


static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2;
static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8;
static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216+100;
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162+100;

- (void)didBeginEditingIn:(UIView *)view
{
    CGRect textFieldRect = [self.view.window convertRect:view.bounds fromView:view];
    CGRect viewRect = [self.view.window convertRect:self.view.bounds fromView:self.view];

    CGFloat midline = textFieldRect.origin.y + 0.5* textFieldRect.size.height;
    CGFloat numerator = midline - viewRect.origin.y- MINIMUM_SCROLL_FRACTION * viewRect.size.height;
    CGFloat denominator = (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION)* viewRect.size.height;
    CGFloat heightFraction = numerator / denominator;

    if (heightFraction < 0.0)
    {
        heightFraction = 0.0;
    }
    else if (heightFraction > 1.0)
    {
        heightFraction = 1.0;
    }

    UIInterfaceOrientation orientation =
    [[UIApplication sharedApplication] statusBarOrientation];
    if (orientation == UIInterfaceOrientationPortrait ||
        orientation == UIInterfaceOrientationPortraitUpsideDown)
    {
        _animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
    }
    else
    {
        _animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
    }

    CGRect viewFrame = self.view.frame;
    viewFrame.origin.y -= _animatedDistance;

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

    [self.view setFrame:viewFrame];

    [UIView commitAnimations];
}

- (void)didEndEditing
{
    CGRect viewFrame = self.view.frame;
    viewFrame.origin.y += _animatedDistance;

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

    [self.view setFrame:viewFrame];

    [UIView commitAnimations];
}