CocosBuilder配合Cocos2D-X

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由于c++没有反射，CocosBuilder配合cocos2d-x比cocos2d繁琐。

  • 设置node的Custom Class，要为该类写loader，该loader继承自cocos2d::extension::CCXXXLoader
  • memberVar和menuItem的target可以是doc root或owner
  • 设置memberVar，会在load过称中调用target的onAssignCCBMemberVariable，即target要实现cocos2d::extension::CCBSelectorResolver
  • 设置menuItem的callback，会在load过称中调用target的onResolveCCBCCMenuItemSelector，即target要实现cocos2d::extension::CCBSelectorResolver

Case 1：ccb中的CCLayer关联代码中的GameLayer

  1. ccb中CCLayer设置Custom class为GameLayer

  2. 代码中为GameLayer添加loader类class GameLayerLoader : public cocos2d::extension::CCLayerLoader，为该loader实现createCCNode()方法。 若在ccb中给该CCLayer设置了custom property，还得在loader类中实现相应的onHandlePropTypeXXX()方法。

  3. 在提供给CCBReader的CCNodeLoaderLibrary中注册loader对象

     auto loaderLibrary = cocos2d::extension::CCNodeLoaderLibrary::newDefaultCCNodeLoaderLibrary();
 loaderLibrary->registerCCNodeLoader(“GameLayer”, nodeLoader);

  4. 代码中可选实现class GameLayer: public cocos2d::extension::CCNodeLoaderListener

  • 该过称繁杂，可写util函数，然后：

      auto layer = ccb::layer<GameLayer>(/*init params*/);

    如GameLayer含Custom Class子类CustomMenuItemImage，可用：

      auto loaderLibrary = ccb::defaultCCNodeLoaderLibrary<GameLayer, CCLayerLoader>();
  ccb::registerCCNodeLoader<CustomMenuItemImage, CCMenuItemImageLoader>(loaderLibrary);
  auto layer = ccb::layer<GameLayer>(loaderLibrary/*, other init params*/);

Case 2. ccb中的CCMenu关联代码GameLayer的buttonMenu

  1. ccb中CMenu设置Code connections：选Doc root var填memberVar

  2. 代码中class GameLayer : public cocos2d::extension::CCBMemberVariableAssigner，并实现：

     bool onAssignCCBMemberVariable(cocos2d::CCObject * pTarget, cocos2d::CCString * pMemberVariableName, cocos2d::CCNode * pNode) {
     CCB_MEMBERVARIABLEASSIGNER_GLUE(this, "_buttonMenu", CCMenu *, _buttonMenu);
     return false;
 }

  • 可定义简化宏：

      #define CCB_MEMBER_VAR(__TYPE__, __VAR__) CCB_MEMBERVARIABLEASSIGNER_GLUE(this, #__VAR__, __TYPE__, __VAR__)

    然后onAssignCCBMemberVariable()中可写

      CCB_MEMBER_VAR(CCMenu *, _buttonMenu);

Case 3：ccb中CCMenuItem调用代码GameLayer的buttonCallback

  1. ccb中的CCMenuItem设置：selector为buttonCallback，Target为Document root

  2. 代码中class GameLayer : public cocos2d::extension::CCBSelectorResolver，并实现：

     cocos2d::SEL_MenuHandler onResolveCCBCCMenuItemSelector(cocos2d::CCObject * pTarget, cocos2d::CCString * pSelectorName) {
     CCB_SELECTORRESOLVER_CCMENUITEM_GLUE(this, "buttonCallback", GameLayer::backButtonCallback);
     return NULL;
 }
 cocos2d::extension::SEL_CCControlHandler onResolveCCBCCControlSelector(cocos2d::CCObject * pTarget, cocos2d::CCString * pSelectorName) {
     return NULL;
 };

  • 可定义简化宏：

      #define CCB_CCMENUITEM_SELECTOR(__CLASS__, __FUNC__) CCB_SELECTORRESOLVER_CCMENUITEM_GLUE(this, #__FUNC__, __CLASS__::__FUNC__)
  #define CCB_CCCONTROL_SELECTOR(__CLASS__, __FUNC__) CCB_SELECTORRESOLVER_CCCONTROL_GLUE(this, #__FUNC__, __CLASS__::__FUNC__)

    然后onResolveCCBCCMenuItemSelector()中可写

      CCB_CCMENUITEM_SELECTOR(GameLayer, backButtonCallback);

参考