Removing sprite from layer not removing rect with it (Cocos2d)?

Question

I am making a game in Cocos2d. Everything is okay, so far. I used Ray Wenderlich's tutorial to get collision detection to work. It works, but whenever an 'enemy' spawns where a bullet was deleted (because the bullet that was deleted hit a target, therefore, was deleted), the enemy is automatically deleted, too. I think it's because it doesn't remove the rect that was declared for the sprite. Note, it also can go through more than one enemy, even though the bullet is deleted. Any help is appreciated. Thanks!

EDIT: I found out what the problem was. I had the shoot method set in a schedule:@selector method, with no set interval. That meant that it would fire bullets 60fps fast. So I was getting TWO bullets with ONE click. They were so close together, that it took me a while to notice it. I won't make that mistake again!!!

Kazuki Sakamoto Kazuki Sakamoto · Accepted Answer · 2011-05-24T21:45:58

Are you using the following code? (from How To Make A Simple iPhone Game with Cocos2D Tutorial)

- (void)update:(ccTime)dt {

  NSMutableArray *projectilesToDelete = [[NSMutableArray alloc] init];
  for (CCSprite *projectile in _projectiles) {
    CGRect projectileRect = CGRectMake(
      projectile.position.x - (projectile.contentSize.width/2), 
      projectile.position.y - (projectile.contentSize.height/2), 
      projectile.contentSize.width, 
      projectile.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(projectileRect, targetRect)) {
        [targetsToDelete addObject:target];             
      }                     
    }

    for (CCSprite *target in targetsToDelete) {
      [_targets removeObject:target];
      [self removeChild:target cleanup:YES];                                    
    }

    if (targetsToDelete.count > 0) {
      [projectilesToDelete addObject:projectile];
    }
    [targetsToDelete release];
  }

  for (CCSprite *projectile in projectilesToDelete) {
    [_projectiles removeObject:projectile];
    [self removeChild:projectile cleanup:YES];
  }
  [projectilesToDelete release];
}

whenever an 'enemy' spawns where a bullet was deleted, the enemy is automatically deleted, too.

It sounds that the bullet is removed from the layer, but it is not removed from _projectiles array.

    [_projectiles removeObject:projectile];

Are you sure that this code works?

Removing sprite from layer not removing rect with it (Cocos2d)?

2 Answers