Stop UITextView from jumping when programatically setting text
- by Michael Waterfall
Hi there,
I have to update a small amount of text in a scrolling UITextView. I'll only be inserting a character where the cursor currently is, and I'll be doing this on a press of a button on my navigation bar.
My problem is that whenever I call the setText method of the text view, it jumps to the bottom of the text. I've tried using contentOffset and resetting the selectedRange but it doesn't work! Here's my example:
// Remember offset and selection
CGPoint contentOffset = [entryTextView contentOffset];
NSRange selectedRange = [entryTextView selectedRange];
// Update text
entryTextView.text = entryTextView.text;
// Try and reset offset and selection
[entryTextView setContentOffset:contentOffset animated:NO];
[entryTextView setSelectedRange: selectedRange];
Is there any way you can update the text without any scroll movement at all... as if they'd just typed something on the keyboard?
Many thanks,
Michael
Edit:
I've tried using the textViewDidChange: delegate method but it's still not scrolling up to the original location.
- (void)textViewDidChange:(UITextView *)textView {
if (self.programChanged) {
[textView setSelectedRange:self.selectedRange];
[textView setContentOffset:self.contentOffset animated:NO];
self.programChanged = NO;
}
}
- (void)changeButtonPressed:(id)sender {
// Remember position
self.programChanged = YES;
self.contentOffset = [entryTextView contentOffset];
self.selectedRange = [entryTextView selectedRange];
// Update text
entryTextView.text = entryTextView.text;
}
