标签：color view ptr lib 获取 function func type tin
在用cocosLua 翻写 fairyGUIdemo的C++版本的代码时,发现在写到obj->getGroup()->name 的时候，运行找不到名字；
demo中的C++代码为
int cnt = _view->numChildren(); for (int i = 0; i < cnt; i++) { GObject* obj = _view->getChildAt(i); if (obj->getGroup() != nullptr && obj->getGroup()->name.compare("btns") == 0) obj->addClickListener(CC_CALLBACK_1(BasicsScene::runDemo, this)); }
翻写的代码为
local cnt = _view:numChildren() for i = 1, cnt do local obj = _view:getChildAt(i - 1) if (obj:getGroup() ~= nil and obj:getGroup().name == "btns") then obj:addClickListener(handler(self, self.runDemo)) end --end end
打印的obj:getGroup().name 始终为nil。于是去修改源码，在libfairygui工程中GObject.h文件添加两行代码，就是为了把name和id作为函数导出，以便在lua中能被获取到。（id我顺手导出，如果你不用，可以不用导出）
std::string getName() const { return name; }; std::string getId() const { return id; };
然后打开lua_cocos2dx_fairygui_auto.cpp文件（上一章中导出的文件，可以去看），添加
int lua_cocos2dx_fairygui_GObject_getName(lua_State* tolua_S) { int argc = 0; fairygui::GObject* cobj = nullptr; bool ok = true; #if COCOS2D_DEBUG >= 1 tolua_Error tolua_err; #endif #if COCOS2D_DEBUG >= 1 if (!tolua_isusertype(tolua_S, 1, "fgui.GObject", 0, &tolua_err)) goto tolua_lerror; #endif cobj = (fairygui::GObject*)tolua_tousertype(tolua_S, 1, 0); #if COCOS2D_DEBUG >= 1 if (!cobj) { tolua_error(tolua_S, "invalid ‘cobj‘ in function ‘lua_cocos2dx_fairygui_GObject_getName‘", nullptr); return 0; } #endif argc = lua_gettop(tolua_S) - 1; if (argc == 0) { if (!ok) { tolua_error(tolua_S, "invalid arguments in function ‘lua_cocos2dx_fairygui_GObject_getName‘", nullptr); return 0; } std::string ret = cobj->getName(); lua_pushlstring(tolua_S, ret.c_str(), ret.length()); return 1; } luaL_error(tolua_S, "%s has wrong number of arguments: %d, was expecting %d \n", "fgui.GObject:getName", argc, 0); return 0; #if COCOS2D_DEBUG >= 1 tolua_lerror: tolua_error(tolua_S, "#ferror in function ‘lua_cocos2dx_fairygui_GObject_getName‘.", &tolua_err); #endif return 0; } int lua_cocos2dx_fairygui_GObject_getId(lua_State* tolua_S) { int argc = 0; fairygui::GObject* cobj = nullptr; bool ok = true; #if COCOS2D_DEBUG >= 1 tolua_Error tolua_err; #endif #if COCOS2D_DEBUG >= 1 if (!tolua_isusertype(tolua_S, 1, "fgui.GObject", 0, &tolua_err)) goto tolua_lerror; #endif cobj = (fairygui::GObject*)tolua_tousertype(tolua_S, 1, 0); #if COCOS2D_DEBUG >= 1 if (!cobj) { tolua_error(tolua_S, "invalid ‘cobj‘ in function ‘lua_cocos2dx_fairygui_GObject_getId‘", nullptr); return 0; } #endif argc = lua_gettop(tolua_S) - 1; if (argc == 0) { if (!ok) { tolua_error(tolua_S, "invalid arguments in function ‘lua_cocos2dx_fairygui_GObject_getId‘", nullptr); return 0; } std::string ret = cobj->getId(); lua_pushlstring(tolua_S, ret.c_str(), ret.length()); return 1; } luaL_error(tolua_S, "%s has wrong number of arguments: %d, was expecting %d \n", "fgui.GObject:getId", argc, 0); return 0; #if COCOS2D_DEBUG >= 1 tolua_lerror: tolua_error(tolua_S, "#ferror in function ‘lua_cocos2dx_fairygui_GObject_getId‘.", &tolua_err); #endif return 0; }
并导出两个函数，找到int lua_register_cocos2dx_fairygui_GObject(lua_State* tolua_S) 函数在里面写入
int lua_register_cocos2dx_fairygui_GObject(lua_State* tolua_S) { ... ... tolua_function(tolua_S, "getName", lua_cocos2dx_fairygui_GObject_getName); tolua_function(tolua_S, "getId", lua_cocos2dx_fairygui_GObject_getId); .... }
至此 已完成导出
下面开始修改lua代码调用
local cnt = _view:numChildren() print("cnt:", cnt) for i = 1, cnt do local obj = _view:getChildAt(i - 1) if (obj:getGroup() ~= nil and obj:getGroup():getName() == "btns") then print("name==>::", obj:getGroup():getName()) obj:addClickListener(handler(self, self.runDemo)) end --end end
编译，运行
完成！
Cocos2dLua3.17.2集成FairyGUI之 lua绑定 getGroup() 调用问题(三)
标签：color view ptr lib 获取 function func type tin
原文地址：https://www.cnblogs.com/whj0402/p/12202511.html
