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PODetecting if a specific sprite was touched on Cocos2d-iphone
 

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    <p>I was following Ray`s tutorial for making a simple iPhone game (here: <a href="http://goo.gl/fwPi" rel="nofollow">http://goo.gl/fwPi</a>) , and decided that i wanted the enemies to be eliminated when they get touched.</p> <p>My initial approach was to spawn a small CCSprite sprite on the touch location, then use CGRectMake to create a bounding box of said sprite to detect if the enemy sprite was touched. Much like Ray does with the projectile/enemy. But of course, my way of doing it isnt working and i cant dig myself out of this hole.</p> <p>Here is the relevant code snippet. Any help is appreciated:</p> <pre> - (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { // Choose one of the touches to work with UITouch *touch = [touches anyObject]; CGPoint location = [self convertTouchToNodeSpace: touch]; location = [[CCDirector sharedDirector] convertToGL:location]; CCSprite *touchedarea = [CCSprite spriteWithFile:@"Icon-72.png" rect:CGRectMake(location.x, location.y, 2, 2)]; touchedarea.tag = 2; [self addChild:touchedarea]; [_touchedareas addObject:touchedarea]; } - (void)update:(ccTime)dt { NSMutableArray *touchedareasToDelete = [[NSMutableArray alloc] init]; for (CCSprite *touchedarea in _touchedareas) { CGRect touchedareaRect = CGRectMake( touchedarea.position.x, touchedarea.position.y, touchedarea.contentSize.width, touchedarea.contentSize.height); NSMutableArray *targetsToDelete = [[NSMutableArray alloc] init]; for (CCSprite *target in _targets) { CGRect targetRect = CGRectMake( target.position.x - (target.contentSize.width/2), target.position.y - (target.contentSize.height/2), target.contentSize.width, target.contentSize.height); if (CGRectIntersectsRect(touchedareaRect, targetRect)) { [targetsToDelete addObject:target]; } } for (CCSprite *target in targetsToDelete) { [_targets removeObject:target]; [self removeChild:target cleanup:YES]; } if (targetsToDelete.count > 0) { [touchedareasToDelete addObject:touchedarea]; } [targetsToDelete release]; } for (CCSprite *touchedarea in touchedareasToDelete) { [_touchedareas removeObject:touchedarea]; [self removeChild:touchedarea cleanup:YES]; } [touchedareasToDelete release]; } </pre>
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    1. COI asked a question about best practices for this: http://stackoverflow.com/questions/2900691/best-practices-for-handling-touches-to-a-ccsprite-with-cocos2d Hope this helps!
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