Question

I’ve been studying this for hours (2 days, actually) and just cannot figure out what is wrong. The touches are accepted and processing, but the isTouchHandled test is triggering TRUE prematurely; as if a different bounding box was touched than the one that is touched. I have several non-overlapping CCSprite buttons, with each pointed to in the levelButtons array. Iterate through to see which one is touched; but it’s always the wrong one.

Does the CGRectContainsPoints method get thrown off if these sprites are in their own layer, which is then in another layer? In other words, is CGRectContainsPoints using raw equality of pixel locations as reported by position? If so, a sprite’s position relative to the entire screen is different than its reported position if it is a child, which is relative to the parent. Maybe this has something to do with it? My array and the tags of its contents are correctly lining up, I’ve logged and checked that many times; it appears to be the bounding box check.

-(BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event{
    CCLOG (@"levelButtons size:%i",[self.levelButtons count]);
    BOOL isTouchHandled = NO;
    for (int i=0;i<25;i++){

        CCSprite*temp=(CCSprite*)[self.levelButtons objectAtIndex:i];

        CCLOG(@"iteration temp.tag: %i for object: %i",temp.tag,i);

            isTouchHandled= CGRectContainsPoint([temp boundingBox], [[CCDirector sharedDirector] convertToGL:[touch locationInView: [touch view]]]);

        if (isTouchHandled) {

            CCLOG(@"level touched: %i",temp.tag);

            break;
        }

    }


    return isTouchHandled;
}

UPDATE: Incidentally, I also just subclassed CCSprite and add the touche methods to the individual sprites in this fashion ,taking my array of sprites out of the picture. The results were the same, so I suspect the CGRectContainsPoints is not properly working when your rect is a child of other children, the coordinates are not being reported correctly, I suspect.

Answer 1

I solved this by creating a new CGRect for the CGRectContainsPoint test, and translating the bounding box into the actual onscreen rectangle; the bounding box test will not work on its own if it is located on a child sprite (or layer). It returns its local position only, relative to the parent.