UILabel+TapLocation.m

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iOS/UILabel+TapLocation.m

      1 #import "UILabel+TapLocation.h"
      2 
      3 @implementation UILabel (TapLocation)
      4 
      5 - (unsigned)characterAtTap:(UITapGestureRecognizer *)tap
      6 {
      7     CGPoint tapLocation = [tap locationInView:self];
      8     
      9     NSTextStorage *textStorage = [[NSTextStorage alloc] initWithAttributedString:self.attributedText];
     10     NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init];
     11     [textStorage addLayoutManager:layoutManager];
     12     
     13     NSTextContainer *textContainer = [[NSTextContainer alloc] initWithSize:CGSizeMake(self.frame.size.width,
     14                                                                                       self.frame.size.height + 256)];
     15     textContainer.lineFragmentPadding = 0;
     16     textContainer.maximumNumberOfLines = 256;
     17     textContainer.lineBreakMode = self.lineBreakMode;
     18     
     19     [layoutManager addTextContainer:textContainer];
     20     
     21     return [layoutManager characterIndexForPoint:tapLocation
     22                                  inTextContainer:textContainer
     23         fractionOfDistanceBetweenInsertionPoints:NULL];
     24 
     25 }
     26 
     27 @end

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