Question

I use a UIWebView to display text with embedded links in my application. I’ve got a method that detects taps in the UIWebView, but I want to figure out how to detect what character / part of text in the note was tapped.

When a user taps, the text, it’ll open a UITextView with that same text, and I’d like to place the cursor at the position of the tap.

So far, I’ve figured out how to get the X and Y position as follows:

 NSInteger xInt = [x integerValue];
 NSInteger yInt = [y integerValue] + (int)webView.scrollView.contentOffset.y;

I’ve also got the text as follows:

UILabel *noteTextLabel = [[UILabel alloc] init];
noteTextLabel.font = [UIFont systemFontOfSize:TEXT_FONT_SIZE_LARGE];
noteTextLabel.text = note.text;

How would I detect which character was tapped, based on the X and Y position?

Answer 1

I figured out how to do it, based on this question.

In the viewController that is loaded with the UITextView, I pass an attribute called pointForCursor that’s a CGPoint with the X and Y as mentioned above.

Then in viewWillAppear, I run the following:

if (self.pointForCursor.x > 0) {
        NSLog(@"Should have point for cursor");
        UITextPosition *position=[noteTextView closestPositionToPoint:pointForCursor];
        [noteTextView setSelectedTextRange:[noteTextView textRangeFromPosition:position toPosition:position]];
}

NOTE: My UIWebView and this UITextView use the same size font, so there weren’t any concerns there.