CoreText实现图文混排和点击事件(5)

        {
            line = CFArrayGetValueAtIndex(lines, i);
            lineOrigin = origin;
            break;
        }
    }
   
    location.x -= lineOrigin.x;
    //获取点击位置所处的字符位置，就是相当于点击了第几个字符
    CFIndex index = CTLineGetStringIndexForPosition(line, location);
    NSLog(@"index:%ld",index);
    //判断点击的字符是否在需要处理点击事件的字符串范围内，这里是hard code了需要触发事件的字符串范围
    if (index>=1&&index<=10) {
        UIAlertView* alert = [[UIAlertView alloc]initWithTitle:@"click event" message:[originalStr substringWithRange:NSMakeRange(0, 10)] delegate:self cancelButtonTitle:@"cancel" otherButtonTitles:@"ok", nil];
        [alert show];
    }

}

效果图如下：