cocos2d-x3.8lua关于setAnimationCompletedCallback的修改

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在cocos-lua使用ccb动画播放攻击完成以后，加点绚丽的特效，需要使用C++中setAnimationCompletedCallback方法，很无奈没有发现C++与lua的相互调用，只能补充添加了。

/*
出处: cocosbuilder/CCBAnimationManager.h文件
作用: 动画完成回调
*/
void setAnimationCompletedCallback(cocos2d::Ref *target, cocos2d::SEL_CallFunc callbackFunc);

首先我们要做的是找到关于CCBAnimationManager中的lua与C++的注册接口，即：

// 在lua_cocos2dx_cocosbuilder_auto.cpp中，该接口用于添加C++与lua交互的所有CCBAnimationManager相关的实现方法
int lua_register_cocos2dx_cocosbuilder_CCBAnimationManager(lua_State* tolua_S)

在该接口内，我们添加新的静态方法调用:

// 在lua_cocos2dx_cocosbuilder_auto.cpp中
// C++与lua的交互，通过tolua相关，添加该代码后，lua就可以使用setAnimationCompletedCallback接口进行处理了
tolua_function(tolua_S,"setAnimationCompletedCallback",lua_cocos2dx_cocosbuilder_CCBAnimationManager_setAnimationCompletedCallback);

然后，我们依然在lua_cocos2dx_cocosbuilder_auto.cpp中，编写关于lua_cocos2dx_cocosbuilder_CCBAnimationManager_setAnimationCompletedCallback方法相关，如下：

static int lua_cocos2dx_cocosbuilder_CCBAnimationManager_setAnimationCompletedCallback(lua_State* tolua_S)
{
　　// 判定参数是否为空
    if (nullptr == tolua_S)
        return 0;
    
    int argc = 0;
    cocosbuilder::CCBAnimationManager* self = nullptr;
    // 判定类型是否为指定类型
#if COCOS2D_DEBUG >= 1
    tolua_Error tolua_err;
    if (!tolua_isusertype(tolua_S, 1, "cc.CCBAnimationManager", 0, &tolua_err)) goto tolua_lerror;
#endif
    // 判定对象是否有效
    self = static_cast<cocosbuilder::CCBAnimationManager *>(tolua_tousertype(tolua_S,1,0));
#if COCOS2D_DEBUG >= 1
    if (nullptr == self)
    {
        tolua_error(tolua_S,"invalid 'self' in function 'lua_cocos2dx_cocosbuilder_CCBAnimationManager_setAnimationCompletedCallback'\n", NULL);
        return 0;
    }
#endif
    // 判定参数是否正确
    argc = lua_gettop(tolua_S) - 1;
    if (argc == 1)
    {
#if COCOS2D_DEBUG >= 1
        if(!toluafix_isfunction(tolua_S,2,"LUA_FUNCTION",0,&tolua_err))
            goto tolua_lerror;
#endif
        
        LUA_FUNCTION handler = toluafix_ref_function(tolua_S,2,0);
        LuaCCBAnimationWrapper* tmpCallback = new LuaCCBAnimationWrapper();
        tmpCallback->setCallback(handler);
        
        self->setAnimationCompletedCallback(tmpCallback, CC_CALLFUNC_SELECTOR(LuaCCBAnimationWrapper::animationCompletedCallback));
        
        return 0;
    }
    luaL_error(tolua_S, "'setAnimationCompletedCallback'function has wrong number of arguments: %d\n", argc);
    return 0;
    
#if COCOS2D_DEBUG >= 1
tolua_lerror:
    tolua_error(tolua_S,"#ferror in function 'lua_cocos2dx_cocosbuilder_CCBAnimationManager_setAnimationCompletedCallback'.",&tolua_err);
    return 0;
#endif
}

2. 接着开始创建LuaCCBAnimationWrapper.h和LuaCCBAnimationWrapper.cpp的文件，其目录大家自定义，能够调用到，方便维护就行了哈。

(1) LuaCCBAnimationWrapper.h

#ifndef __LuaCCBanimationWrapper_H_
#define __LuaCCBanimationWrapper_H_

#include "cocos2d.h"

USING_NS_CC;
using namespace std;

class LuaCCBAnimationWrapper : public Ref
{
public:
    LuaCCBAnimationWrapper();
    ~LuaCCBAnimationWrapper();
    
    void animationCompletedCallback();
    void setCallback(unsigned nFuncID);
    
private:
    CallFunc *pCCCallFunc;
    unsigned int m_nFuncID;
};

#endif

(2) LuaCCBAnimationWrapper.cpp

#include "LuaCCBAnimationWrapper.h"
#include "CCLuaEngine.h"

LuaCCBAnimationWrapper::LuaCCBAnimationWrapper()
:pCCCallFunc(NULL),
m_nFuncID(0)
{
    //
}

LuaCCBAnimationWrapper::~LuaCCBAnimationWrapper()
{
    //
}

void LuaCCBAnimationWrapper::setCallback(unsigned int nFuncID)
{
    CCLOG("LuaCCBAnimationWrapper::setCallback(nFuncID = %i)", nFuncID);
    m_nFuncID = nFuncID;
}

void LuaCCBAnimationWrapper::animationCompletedCallback()
{
    /*
     2.x
    if (0 != m_nFuncID)
    {
        CallFunc *CallFuncTmp = CallFunc::create();
        CallFuncTmp->execute();
        m_nFuncID = 0; //TODO 当动画循环播放时会报错，记得修改
    }
    */
    
    //3.x
    if (0 != m_nFuncID)
    {
        LuaStack* stack = LuaEngine::getInstance()->getLuaStack();
        stack->executeFunctionByHandler(m_nFuncID, 1);
        m_nFuncID = 0; 
    }
}