创建CCSequence时CCFiniteTimeAction :: getDuration()EXC_BAD_ACCESS

时间:2013-02-17 17:19:55

标签: c++ cocos2d-iphone ios-simulator cocos2d-x

我能够在iPhone模拟器上运行此代码而不会出现错误。但是,当我在iPhone上运行它时,我收到一个EXC_BAD_ACCESS错误。这是代码:

        CCAnimate * explosionAnimate = CCAnimate::create(explosionAnimation);
        CCCallFuncN * callFuncN = CCCallFuncN::create(this,callfuncN_selector(GameLayer::removeChildFromParent));
        CCFiniteTimeAction * explosionSequence = CCSequence::create(explosionAnimate, callFuncN);

        CCSprite * explosionSprite = CCSprite::createWithSpriteFrameName("explosion_frame_1");
        addChild(explosionSprite);

        explosionSprite->setPosition(point);
        explosionSprite->runAction(explosionSequence);
    }

    void GameLayer::removeChildFromParent(CCNode * child)
    {
        child->removeFromParent();
    }

调用CCSequence :: create(...)时发生错误。通过CCSequence进行调试:: create(...)

CCFiniteTimeAction* CCSequence::create(CCFiniteTimeAction *pAction1, va_list args)
{
    CCFiniteTimeAction *pNow;
    CCFiniteTimeAction *pPrev = pAction1;

    while (pAction1)
    {
        pNow = va_arg(args, CCFiniteTimeAction*);
        if (pNow)
        {
            pPrev = createWithTwoActions(pPrev, pNow);
        }
        else
        {
            break;
        }
    }

    return pPrev;
}

我看到“createWithTwoActions”被叫两次。这似乎不对。在第二次调用“createWithTwoActions”。错误发生在CCFiniteTimeAction中,特别是在getDuration()内联函数中:

inline float getDuration(void) { return m_fDuration; }

为什么会发生这种情况?

1 个答案:

答案 0 :(得分:4)

我能够通过调用CCSequence :: create()来解决这个问题:

CCSequence::create(explosionAnimate, callFuncN, NULL);

而不是:

CCSequence::create(explosionAnimate, callFuncN);

我猜测这与CCFiniteAction指针和C ++可变长度参数的性质有关。