Animate scrolling to new content offset when keyboard appears in iOS 7.

AnimatedScroll.m

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:[info[UIKeyboardAnimationDurationUserInfoKey] doubleValue]];
[UIView setAnimationCurve:[info[UIKeyboardAnimationCurveUserInfoKey] integerValue]];
[UIView setAnimationBeginsFromCurrentState:YES];

self.textViewKeyboardConstraint.constant = height;
UIEdgeInsets insets = UIEdgeInsetsMake(
    scrollView.contentInset.top, 0, textView.bounds.size.height + height, 0);
scrollView.contentInset = insets;
scrollView.scrollIndicatorInsets = insets;
[view layoutIfNeeded];

[scrollView setContentOffset:CGPointMake(0, newOffset) animated:NO];

[UIView commitAnimations];