Action模块非常适合游戏对象的复杂操作

class CC_DLL Action : public Ref, public Clonable

class CC_DLL FiniteTimeAction : public Action

class CC_DLL ActionInterval    : public FiniteTimeAction

class CC_DLL ActionInstant     : public FiniteTimeAction

 添加动作

Action * Node::runAction(Action* action){    CCASSERT( action != nullptr, "Argument must be non-nil");    _actionManager->addAction(action, this, !_running);    return action;}

 

void ActionManager::addAction(Action *action, Node *target, bool paused){        element = (tHashElement*)calloc(sizeof(*element), 1);        element->paused = paused;        target->retain();        element->target = target;        HASH_ADD_PTR(_targets, target, element);     actionAllocWithHashElement(element);     ccArrayAppendObject(element->actions, action);      action->startWithTarget(target); // ??}

循环来源

void Director::drawScene()

void Scheduler::update(float dt)

void ActionManager::update(float dt)

遍历并调用 void Action::step(float dt)

void Action::update(float time) // 归一的时间参数

void Blink::update(float time){    if (_target && ! isDone())    {        float slice = 1.0f / _times;        float m = fmodf(time, slice);        _target->setVisible(m > slice / 2 ? true : false);    }}

很明晰对关系，也很方便添加自定义action

动作运行结束或者主动stop，ActionManager 会自动release对应的action

节点和action之间没有引用关系，都是通过ActionManager联系

 

Action * Node::getActionByTag(int tag){    CCASSERT( tag != Action::INVALID_TAG, "Invalid tag");    return _actionManager->getActionByTag(tag, this);}

 

this->runAction(MoveBy::create(4, ccp(100,0)));    this->runAction(MoveBy::create(4, ccp(0,100)));

如果打开了CC_ENABLE_STACKABLE_ACTIONS宏（默认打开（3.0））

部分动作可以直接并行执行，例如MoveBy可以实现类似 物理学 合力的表现