碰撞检查问题

Question

因此，在我的游戏中，我有物品从屏幕顶部落下，当玩家（另一个精灵）抓住物品时，物品消失并将其添加到柜台。

这是我的碰撞检测方法

//WHEN THE THINGS COLLIDE, THEY DISSAPEAR 
- (void)update:(ccTime)dt { 
CGSize winSize = [[CCDirector sharedDirector] winSize]; 

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); 
    BOOL playerHit = FALSE; 
     CGRect playerRect = CGRectMake(
             _Banker.position.x - (_Banker.contentSize.width/2), 
             _Banker.position.y -  (_Banker.contentSize.height/2), 
             _Banker.contentSize.width, 
             _Banker.contentSize.height); 

     if (CGRectIntersectsRect(playerRect, targetRect)) { 
      //[targetsToDelete addObject:target]; 
      playerHit = TRUE; 
       [targetsToDelete addObject:target]; 

      break; 

    } 

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

     _targetsDestroyed++; 
     [_label setString:[NSString stringWithFormat:@""]]; 
     if (_targetsDestroyed > 30) { 
      GameWinScene *gameWinScene = [GameWinScene node]; 
      _targetsDestroyed = 0; 
      [[CCDirector sharedDirector] replaceScene:gameWinScene]; 
     } else{ 
      NSString *killcounttext = [NSString stringWithFormat:@"Catches: %i",  _targetsDestroyed]; 
      self.label = [CCLabelTTF labelWithString:killcounttext fontName:@"Zapfino"  fontSize:20]; 
      _label.color = ccc3(225,225,225); 
      _label.position = ccp(winSize.width * 0.20,winSize.height * 0.92); 
      [self addChild:_label]; 
     } 
    } 

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

我添加了一个CCLOG，以确保被添加的目标在我的下一个方法的话，我删除targetstodelete任何东西，因为targetstodelete。 CCLOG证实目标正在被添加，但它们并未被删除。

这是我的删除方法

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

     _targetsDestroyed++; 
     [_label setString:[NSString stringWithFormat:@""]]; 
     if (_targetsDestroyed > 30) { 
      GameWinScene *gameWinScene = [GameWinScene node]; 
      _targetsDestroyed = 0; 
      [[CCDirector sharedDirector] replaceScene:gameWinScene]; 
     } else{ 
      NSString *killcounttext = [NSString stringWithFormat:@"Catches: %i", _targetsDestroyed]; 
      self.label = [CCLabelTTF labelWithString:killcounttext fontName:@"Zapfino" fontSize:20]; 
      _label.color = ccc3(225,225,225); 
      _label.position = ccp(winSize.width * 0.23,winSize.height * 0.92); 
      [self addChild:_label]; 
     } 
    } 

任何帮助表示赞赏，但请不要随便说“去学习Objective-C”像有些人那样：/

Answer 1

在你的代码写了这线，

if (targetsToDelete.count > 0) { 
     [targetsToDelete addObject:target]; 
    } 

我不明白为什么你加这个，所以我认为这是错误，请检查否则解释为什么你添加此代码..