UITextView and the keyboard

gistfile1.m

    [[NSNotificationCenter defaultCenter] addObserverForName:@"UIKeyboardDidShowNotification" object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
        CGRect cursorRect = [self.textView caretRectForPosition:self.textView.selectedTextRange.start];
        if(CGRectGetMaxY(cursorRect) > CGRectGetHeight(self.view.frame) - self.topLayoutGuide.length - 216) {
            [UIView animateWithDuration:1.0f animations:^{
                self.textView.contentOffset = CGPointMake(0, 216);
            } completion:^(BOOL finished) {
            }];
        }
    }];
    
    [[NSNotificationCenter defaultCenter] addObserverForName:@"UIKeyboardDidHideNotification" object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
        if(self.textView.contentOffset.x == 0 && self.textView.contentOffset.y == 0) {
            // do nothing because we didn't have to offset anything.
        } else {
            [UIView animateWithDuration:1.0f animations:^{
                self.textView.contentOffset = CGPointMake(0, 0);
            } completion:^(BOOL finished) {
            }];
        }
    }];