Cocos2d-x学习笔记（十一）瞬时动作

时间：2015-01-09 01:24:37 阅读：173 评论：0 收藏：0 [点我收藏+]

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动作类Action是一切动作的祖先类。它有三个直接继承子类：

FiniteTimeAction受时间限制的动作；
Follow精灵跟随精灵的动作；
Speed运动速度控制；

而FiniteTimeAction又有两个直接子类：分别是ActionInstant和ActionInterval，顾类名而思意。

瞬时动作即立即执行动作，下边是其使用示例：

void MyAction::goMenu(cocos2d::Ref *pSender)
{
    log("Tag = %i", this->getTag());
    Size size = Director::getInstance()->getVisibleSize();
    Vec2 p = Vec2(CCRANDOM_0_1()*size.width, CCRANDOM_0_1()*size.height);

    switch (this->getTag())
    {
        case PLACE_TAG:
            sprite->runAction(Place::create(p));// Places the node in a certain position
            break;
        case FLIPX_TAG:
            sprite->runAction(FlipX::create(true));// Flips the sprite horizontally
            break;
        case FLIPY_TAG:
            sprite->runAction(FlipY::create(true));// Flips the sprite vertically
            break;
        case HIDE_SHOW_TAG:
            if (hiddenFlag)
            {
                sprite->runAction(Hide::create());// Hide the node
                hiddenFlag = false;
            }
            else
            {
                sprite->runAction(Show::create());// Show the node
                hiddenFlag = true;
            }
            break;
        case TOGGLE_TAG:
            sprite->runAction(ToggleVisibility::create());// Toggles the visibility of a node
            break;
        default:
            break;
    }
}
    
void MyAction::backMenu(cocos2d::Ref *pSender)
{
    auto sc = HelloWorld::createScene();
    // Slide in the incoming scene from the left border.
    auto reScene = TransitionSlideInL::create(1.0f, sc);
    Director::getInstance()->replaceScene(reScene);
}

View Code

在goMenu()函数中的动作类都是ActionInstant的子类；

void HelloWorld::OnClickMenu(cocos2d::Ref *pSender)
{
    MenuItem *nmitem = (MenuItem*)pSender;

    auto sc = Scene::create();
    auto layer = MyAction::create();
    layer->setTag(nmitem->getTag());// set layer‘s tag, and this should be the most important part in this func.

    sc->addChild(layer);

    auto reScene = TransitionSlideInR::create(1.0f, sc);
    Director::getInstance()->replaceScene(reScene);
}