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    <p>First, construct the attributed string and save the range of the interactive text and the text itself.</p> <p>Then, draw the attributed string with CoreText Framework, keep the CTFrameRef.</p> <pre><code>CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(attrString); CGMutablePathRef path = CGPathCreateMutable(); CGPathAddRect(path, NULL, bounds); CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), path, NULL); CFRelease(framesetter); CTFrameDraw(frame, context); //CFRelease(frame); CGPathRelease(path); </code></pre> <p>The last, override the [view touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event] like this:</p> <pre><code>- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { NSSet *allTouches = [event allTouches]; if ([allTouches count] == 1) { UITouch *touch = (UITouch *)[allTouches anyObject]; CGPoint touchPoint = [touch locationInView:self]; // Convert to coordinate system of current view touchPoint.y -= self.bounds.size.height; touchPoint.y *= -1; CGPathRef statusPath = CTFrameGetPath(statusCTFrame); NSString *touchedInterStr = nil; if (CGPathContainsPoint(statusPath, NULL, touchPoint, FALSE)) { touchedInterStr = [self getInteractiveStringInFrame:statusCTFrame atPosition:touchPoint]; } else { return ; } } } - (NSString *)getInteractiveStringInFrame:(CTFrameRef)frame atPosition:(CGPoint)point { CGPathRef path = CTFrameGetPath(frame); CGRect rect; CGPathIsRect(path, &amp;rect); // Convert point into rect of current frame, to accurately perform hit testing on CTLine CGPoint pointInsideRect = point; pointInsideRect.x = point.x - rect.origin.x; CFArrayRef lines = CTFrameGetLines(statusCTFrame); CFIndex count = CFArrayGetCount(lines); CGFloat curUpBound = rect.origin.y + rect.size.height; CFIndex touchedIndex = -1; for (CFIndex pos = 0; pos &lt; count; pos++) { CTLineRef curLine = CFArrayGetValueAtIndex(lines, pos); CGFloat ascent, descent, leading; CTLineGetTypographicBounds(curLine, &amp;ascent, &amp;descent, &amp;leading); CGFloat curHeight = ascent + descent + leading; if (pointInsideRect.y &gt;= curUpBound-curHeight &amp;&amp; pointInsideRect.y &lt;= curUpBound){ touchedIndex = CTLineGetStringIndexForPosition(curLine, pointInsideRect); // Hit testing break; } curUpBound -= curHeight; } if (touchedIndex == -1) return nil; NSEnumerator *enumerator = [interactiveStrs objectEnumerator]; InteractiveString *curString; while ((curString = (InteractiveString *)[enumerator nextObject])) { if (NSLocationInRange(touchedIndex, curString.range)) { return curString.content; } } return nil; } </code></pre> <p>You get the interactive text in touchesEnded, then you could do anything you want, like trigger a delegate method.</p> <p>PS: this is the old-fashion solution, I heard that iOS5 had provided something like an enhanced UIWebView to implement the requirements, maybe you could check the apple sdk document library.</p>
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    1. POTo make label text as link
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    1. COWhat is "InteractiveString" I don't found it....
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      1. USNaveen Shan
 

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