检测触摸CCSprite(包含在一个数组中)拖动手指在屏幕上

Question

我是cocos2d的新手，我正在开发一款相同物体(如《水果忍者》)连续下落的游戏，用户必须通过在屏幕上拖动手指来触碰它们。我尝试创建一个NSMutableArray，每次我创建它时都添加一个精灵，但我意识到它检测到我触摸了一个精灵，即使它不是真的，似乎精灵是不可见的。当我触碰到精灵时，我就会移除它，但它可能不会移除它。下面是我的代码:

@interface GameScene : CCScene
{
    NSMutableArray *spriteArray;
}
- (id)init
{
    spriteArray = [[NSMutableArray alloc]init];
    return self;
}
- (void)onEnter
{
    [super onEnter];
    [self schedule:@selector(addSprites:) interval:1.0];
}

- (void)addSprites:(CCTime)dt
{
    CCSprite *sprite = [CCSprite spriteWithImageNamed:@"sprite000.png"];
    int minX = sprite.contentSize.width / 2;
    int maxX = self.contentSize.width - sprite.contentSize.width / 2;
    int rangeX = maxX - minX;
    int randomX = (arc4random() % rangeX) + minX;
    sprite.position = CGPointMake(randomX, self.contentSize.height + sprite.contentSize.height);
    [self addChild:sprite z:6];
    [spriteArray addObject:sprite];
    CCAction *actionMove = [CCActionMoveTo actionWithDuration:3.0 position:CGPointMake(randomX, -sprite.contentSize.height)];
    CCAction *actionRemove = [CCActionRemove action];
    [sprite runAction:[CCActionSequence actionWithArray:@[actionMove, actionRemove]]];
    if ([spriteArray count] > 50) 
    {
        [spriteArray removeObjectsAtIndexes:[NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, 40)]];
    }
}

-(void)touchMoved:(UITouch *)touch withEvent:(UIEvent *)event
{
    CGPoint touchLoc = [touch locationInNode:self];
    for (CCSprite *sprite in spriteArray)
    {
        if (CGRectContainsPoint([sprite boundingBox], touchLoc))
        {
            CCLOG(@"Touched!");
            CCAction *actionRemove = [CCActionRemove action];
            [sprite runAction:actionRemove];
            return;
        }
    }
}

Answer 1

你没有从spriteArray中移除精灵。所以你也会检查被移除精灵的触点。试着

for (int i=0;i<spriteArray.count;i++)
{
    //get the current sprite from the array
    CCSprite *sprite = [spriteArray objectAtIndex:i];
    if (CGRectContainsPoint([sprite boundingBox], touchLoc))
    {
        CCLOG(@"Touched!");
        CCAction *actionRemove = [CCActionRemove action];
        [sprite runAction:actionRemove];
        //remove the sprite from the array
        [spriteArray removeObjectAtIndex:i];
        //decrement i to be safe if you remove the return one day
        --i;
        return;
    }
}