當同時觸摸兩個精靈時碰撞（cocos2d-iphone）

Question

當兩個精靈同時被碰觸時，該應用會崩潰。

-(void)addEnemy 
{ 
    enemy = [CCSprite spriteWithFile:@"enemy.png"]; 
    enemy.position = ccp(winsize.width/2, winsize.height/2); 
    [spriteSheet addChild:enemy]; 
    [spritetiles addObject:enemy]; //spritetiles is NSMutableArray 
} 

觸摸代碼

-(void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    UITouch *touch = [touches anyObject]; 
    CGPoint location = [self convertTouchToNodeSpace: touch]; 
    for (CCSprite *target in [spriteSheet children]) { 
    if (CGRectContainsPoint(target.boundingBox, location)) { 
     [target stopAllActions]; 
     [spriteSheet removeChild:target cleanup:YES]; 
     [spritetiles removeObject:target]; 
    } 
    } 
} 

如果我觸摸精靈中的任何一個，有沒有錯誤，但如果我在觸控小精靈（有時一些精靈的位置就在附近），應用程序會崩潰，在代碼行「if（CGRectContainsPoint（target.boundingBox，location））{」，那麼我該如何解決它？感謝

Answer 1

更新

使用reverseEnumerator，以便通過數組迭代時，您可能需要刪除要素作爲循環的一部分：

-(void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    UITouch *touch = [touches anyObject]; 
    CGPoint location = [self convertTouchToNodeSpace: touch]; 

    for (CCSprite *target in [spriteSheet.children reverseObjectEnumerator]) { 
     if (CGRectContainsPoint(target.boundingBox, location)) { 
      [target stopAllActions]; 
      [spriteSheet removeChild:target cleanup:YES]; 
      [spritetiles removeObject:target]; 
     } 
    } 
}