cocos2d学习（06）——CCNode::addChild(…)在做什么？

 1: void CCNode::addChild(CCNode *child)

 2: {

 3:     CCAssert( child != NULL,"Argument must be non-nil");

 4:     this->addChild(child,child->m_nZOrder,child->m_nTag);

 5: }

 6:

 7:

 8: void CCNode::addChild(CCNode *child,int zOrder)

 9: {

 10:     CCAssert( child != NULL,monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: white"> 11:     this->addChild(child,zOrder,monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: #f4f4f4"> 12: }

 13:

 14:

 15: void CCNode::addChild(CCNode *child,int zOrder,int tag)

 16: {

 17:     //判断参数是否合法

 18:     CCAssert( child != NULL,monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: white"> 19:     CCAssert( child->m_pParent == NULL,"child already added. It can't be added again");

 20:

 21: // 一个节点的父节点指针是CCNode*，其子节点保存在CCArray数组中，其本质也是CCObject

 22: // CCArray *m_pChildren; ///< array of children nodes

 23: // CCNode *m_pParent; ///< weak reference to parent node

 24:

 25:     if( ! m_pChildren )

 26:     {    //子节点数组不存在，申请空间

 27:         this->childrenAlloc();

 28: // void CCNode::childrenAlloc(void)

 29: // {

 30: // m_pChildren = CCArray::createWithCapacity(4); //create的时候调用了autorelease()

 31: // m_pChildren->retain(); //引用计数加一，防止被释放掉

 32: // }

 33:     }

 34:     //插入子节点指针

 35:     this->insertChild(child,zOrder);

 36:

 37: // int m_nTag; ///< a tag. Can be any number you assigned just to identify this node

 38: // 一个标记，可以是任意一个整数，你应该分配一个合理的值给这个节点

 39:     child->m_nTag = tag;    //设置Child的tag，可以是任意数

 40:

 41:     child->setParent(this);        //设置父节点为当前调用addChild函数的节点

 42:     child->setOrderOfArrival(s_globalOrderOfArrival++);

 43:

 44:     if( m_bRunning )

 45:     {

 46:         child->onEnter();

 47:         child->onEnterTransitionDidFinish();

 48:     }

 49: }