UITextView cursor below frame when changing frame

Question

I have a UIViewCOntrollerthat contains a UITextView. When the keyboard appears I resize it like this:

#pragma mark - Responding to          


        

Answer 1

A lot of answers already, I found that in my case it's actually much simpler. On keyboardWillShow I adjust the text view's contentInset and keep the frame full screen. And while scrollRangeToVisible: is not working for me like for so many others, the scroll view methods (from which UITextView inherits) work just fine. This works for me:

- (void)textViewDidChange:(UITextView *)textView
{
    CGRect caret = [_textView caretRectForPosition:_textView.selectedTextRange.end];
    [_textView scrollRectToVisible:caret animated:YES];
}

Answer 2

This is what I ended up doing, and something that seems to work:

- (void)textViewKeyboardWillShow:(NSNotification *)notification
{

    NSDictionary* info = [notification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

     // self.textViewBottomSpace.constant = NSLayoutConstraint in IB (bottom position)
    self.textViewBottomSpace.constant = kbSize.height + 70;
    [self.textView setNeedsDisplay];
}


- (void)textViewKeyboardWillHide:(NSNotification *)notification
{
    self.textViewBottomSpace.constant = 0;
    [self.textView setNeedsDisplay];
}

- (void)scrollCaretToVisible
{
    //This is where the cursor is at.
    CGRect caretRect = [self.textView caretRectForPosition:self.textView.selectedTextRange.end];

    if(CGRectEqualToRect(caretRect, _oldRect))
        return;

    _oldRect = caretRect;

    //This is the visible rect of the textview.
    CGRect visibleRect = self.textView.bounds;
    visibleRect.size.height -= (self.textView.contentInset.top + self.textView.contentInset.bottom);
    visibleRect.origin.y = self.textView.contentOffset.y;

    //We will scroll only if the caret falls outside of the visible rect.
    if(!CGRectContainsRect(visibleRect, caretRect)) {
        CGPoint newOffset = self.textView.contentOffset;

        newOffset.y = MAX((caretRect.origin.y + caretRect.size.height) - visibleRect.size.height + 10, 0);

        [self.textView setContentOffset:newOffset animated:YES];
    }
}

- (void)textViewDidEndEditing:(UITextView *)textView
{    
    [_caretVisibilityTimer invalidate];
    _caretVisibilityTimer = nil;
}

- (void)textViewDidBeginEditing:(UITextView *)textView
{ 
    self.oldRect = [self.textView caretRectForPosition:self.textView.selectedTextRange.end];
    self.caretVisibilityTimer = [NSTimer scheduledTimerWithTimeInterval:0.3 target:self selector:@selector(scrollCaretToVisible) userInfo:nil repeats:YES];
}

Answer 3

A simpler solution to this problem is to update the text view frame in response to the textViewDidBegingEditing delegate method. For further details, see the following:

How to re-size UITextView when keyboard shown with iOS 7