ios - 检测 CCSprite(包含在数组中)在屏幕上拖动手指的触摸

Question

我是 cocos2d 的新手，我正在开发一款游戏，其中相同的对象(如水果忍者)连续落下，用户必须通过在屏幕上拖动手指来触摸它们。我尝试创建一个 NSMutableArray，每次创建它时都会向其添加一个 sprite，但它会掉下来，但我意识到它检测到我触摸了一个 sprite，即使它不是真的，似乎 sprite 是不可见的。当我触摸 Sprite 时，我将其移除，但它可能不会移除它。这是我的代码:

@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

您没有从 spriteArray 中删除 Sprite 。因此，您还将检查已删除 Sprite 的触摸情况。尝试一下

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;
    }
}