Detect Character Tapped in UITextView

Question

I'm using the below code to detect words tapped in a UITextView. This works fine, but I want to detect some special characters, like a ?. ? doesn't show up as part of a word when using UITextGranularityWord and I can't seem to get it to show up when using UITextGranularityCharacter either.

How can I detect taps on single special characters such as the ??

-(NSString*)getWordAtPosition:(CGPoint)pos inTextView:(UITextView*)_tv { //eliminate scroll offset pos.y += _tv.contentOffset.y; //get location in text from textposition at point UITextPosition *tapPos = [_tv closestPositionToPoint:pos]; //fetch the word at this position (or nil, if not available) UITextRange * wr = [_tv.tokenizer rangeEnclosingPosition:tapPos withGranularity:UITextGranularityWord inDirection:UITextLayoutDirectionRight]; if ([_tv textInRange:wr].length == 0) {//i.e. it's not a word NSLog(@"is 0 length, check for characters (e.g. ?)"); UITextRange *ch = [_tv.tokenizer rangeEnclosingPosition:tapPos withGranularity:UITextGranularityCharacter inDirection:UITextLayoutDirectionRight]; NSLog(@"ch range: %@ ch text: %@",ch, [_tv textInRange:ch] ); // logs: ch range: (null) ch text: if ([[_tv textInRange:ch] isEqualToString:@"?"]) { return [_tv textInRange:ch]; } } return [_tv textInRange:wr]; }

I'm not sure how that would work - if my function to return the tapped character can't return the ?, how can I use NSCharacterSet? I don't want to check if a ? exists in the string, but only if it exists in the location that the user taps. — glenstorey
– glenstorey, Commented Sep 12, 2013 at 17:41
Ok I misundestood sorry. You want to get the character which is tapped in your textView, right? I tested you code, that works for the "?", you can use the same way to test all the special character? — Nico
– Nico, Commented Sep 12, 2013 at 18:31
That's really odd - because I can't get it to detect special characters that are part of a word: foo? becomes foo or that are by themselves ?. It just returns an empty NSRange and string. I'm using the GM, perhaps this is a bug? — glenstorey
– glenstorey, Commented Sep 15, 2013 at 17:58

James Kuang · Accepted Answer · 2013-12-18 17:50:25Z

This code worked for me on iOS 6:

 - (void)tappedTextView:(UITapGestureRecognizer *)recognizer { UITextView *textView = (UITextView *)recognizer.view; CGPoint location = [recognizer locationInView:textView]; UITextPosition *tapPosition = [textView closestPositionToPoint:location]; UITextRange *textRange = [textView.tokenizer rangeEnclosingPosition:tapPosition withGranularity:UITextGranularityCharacter inDirection:UITextLayoutDirectionRight]; NSString *character = [textView textInRange:textRange]; NSLog(@"%@", character); }

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