cocos2d-x 斷言和函數(shù)回調(diào)

#define CC_ASSERT(cond) assert(cond)

#if COCOS2D_DEBUG > 0
extern bool CC_DLL cc_assert_script_compatible(const char *msg);
#define CCAssert(cond, msg) do {                              \
      if (!(cond)) {                                          \
        if (!cc_assert_script_compatible(msg) && strlen(msg)) \
          cocos2d::CCLog("Assert failed: %s", msg);           \
        CC_ASSERT(cond);                                      \
      } \
    } while (0)
#else
#define CCAssert(cond, msg) ((void)(cond))
#endif

例子：

//addChild方法，如果要添加的子節(jié)點(diǎn)為空，就停住了，并打印信息“Argument must be non-nil”
void CCNode::addChild(CCNode *child)
{    //不為空不成立，就是為空啦
    CCAssert( child != NULL, "Argument must be non-nil");
    this->addChild(child, child->m_nZOrder, child->m_nTag);
}

2.函數(shù)回調(diào)，主要有三種方式（無參數(shù)，一個(gè)參數(shù)，二個(gè)參數(shù)）

void call1();
void call2(CCNode* node);
void call3(CCNode* node,void* data);

實(shí)現(xiàn)：

void HelloWorld::call1(){
                                               
    CCLog("call1");
                                               
}
void HelloWorld::call2(CCNode* node){
                                               
    CCLog("call2");
}
void HelloWorld::call3(CCNode* node,void* data){
                                               
    CCLog("call3");
                                               
    CCSprite* sp =(CCSprite*) data;
    sp->setScale(2.0f);
                                               
}

函數(shù)回調(diào)：

   CCSprite* sp = CCSprite::create("CloseNormal.png");
    sp->setPosition(CCPointZero);
    addChild(sp);
    CCJumpTo* jump = CCJumpTo::create(1, ccp(400,20), 60, 8);
// 無參
    CCCallFunc* fun1 = CCCallFunc::create(this, callfunc_selector(HelloWorld::call1));
//一個(gè)參數(shù)
    CCCallFunc* fun2 = CCCallFuncN::create(this, callfuncN_selector(HelloWorld::call2));
//兩個(gè)參數(shù)
    CCCallFunc* fun3 = CCCallFuncND::create(this, callfuncND_selector(HelloWorld::call3),(void*)sp);
    CCSequence* seq = CCSequence::create(jump,fun1,fun2,fun3,0);
                              
    sp->runAction(seq);

3.CCProgressTo使用：

//TestCpp中的例子
            
    CCSprite* sp = CCSprite::create("CloseNormal.png");
    sp->setPosition(CCPointZero);
    addChild(sp);
            
    CCSize s = CCDirector::sharedDirector()->getWinSize();
    CCProgressTo *to1 = CCProgressTo::create(2, 100);
    CCProgressTimer *left = CCProgressTimer::create(sp);
    left->setType( kCCProgressTimerTypeRadial );
//圓形進(jìn)度
    addChild(left);
    left->setPosition(ccp(100, s.height/2));
    left->runAction( CCRepeatForever::create(to1));

哈哈，一天一點(diǎn)進(jìn)步，加油