How do I make a score label increase in cocos2d

Question

so I have a label and I would like that when an image collide with another image it increase of 10 . score = score +10; but instead of this it increase of 40 I don't know why . so here is my code :

-(id) init
{
    if( (self=[super init] )) {

        [self schedule:@selector(update:)];

        score = 0;

        scoreLabel = [CCLabelTTF labelWithString:[NSString stringWithFormat:@"%d",score] fontName:@"PUSAB___.TTF" fontSize:15 ];
        scoreLabel.position=ccp(450,30);
        [self addChild:scoreLabel];
    }
}

- (void)update:(ccTime)dt {
    if (CGRectIntersectsRect(mangeurRect, targetRect)) {
        [targetsToDelete addObject:target];     
        score=score + 10; ;// Not really, but your score changes somehow...
        [scoreLabel setString: [NSString stringWithFormat:@"%d",score]];
    }                       
}

sorry for my english I'm french :/

how do you initialize / obtain "mangeurRect" and "targetRect"? Are these screen-relative rects that need update every frame or constant local sprite bounding boxes? — Loic Argelies, Mar 29 '12 at 16:09

score 1 · Accepted Answer · edited Mar 30 '12 at 01:51

I think that there is no frame you are getting in the CGRectIntersectsRect. You should Try the Below code

- (void)update:(ccTime)dt {

if (CGRectIntersectsRect([mangeurRect frame], [targetRect frame])) {
    [targetsToDelete addObject:target];     
    score += 10;
    [scoreLabel setString: [NSString stringWithFormat:@"%d",score]];
}

}

OR

- (void)update:(ccTime)dt {

if (CGRectIntersectsRect([mangeurRect boundingBox], [targetRect boundingBox])) {
    [targetsToDelete addObject:target];     
    score += 10; 
    [scoreLabel setString: [NSString stringWithFormat:@"%d",score]];
}

}

By this you would probably get the score increased whenever the images collide with each other.

score 0 · Answer 2 · answered Mar 28 '12 at 16:54

You should probably check whether your target is not already in targets to delete as follows, in case the process that actually empties the targetsToDelete structure is somehow delayed for a few ticks:

- (void)update:(ccTime)dt {
    if ([targetsToDelete containsObject:target]) return;    // already scored.
    if (CGRectIntersectsRect(mangeurRect, targetRect)) {
        [targetsToDelete addObject:target];     
        score=score + 10; ;// Not really, but your score changes somehow...
        [scoreLabel setString: [NSString stringWithFormat:@"%d",score]];
    }                       
}

the above assumes that targetsToDelete is an NSMutableArray.

try to add some logs to the code and see when the score is changed, based on the objects that you are checking. — Sebastián Castro, Mar 30 '12 at 14:39

score 0 · Answer 3 · answered Mar 30 '12 at 21:03

Your update method is not complete. Try this:

- (void)update:(ccTime)dt {
    if (CGRectIntersectsRect(mangeurRect, targetRect)) {
        [targetsToDelete addObject:target];     
        score=score + 10; ;// Not really, but your score changes somehow...
        [scoreLabel setString: [NSString stringWithFormat:@"%d",score]];

        //do something with your targetsToDelete array.. 
        for (CCSprite *target in targetsToDelete) {
         //[_targets removeObject:target]; //uncomment this line, if you have saved your targets in a _targets array
         [self removeChild:target cleanup:YES];                                 
        }
    }                       
}

Ref: http://www.raywenderlich.com/352/how-to-make-a-simple-iphone-game-with-cocos2d-tutorial

How do I make a score label increase in cocos2d

3 Answers3