c++ - 在 cpp 文件中设置静态枚举变量的正确方法

Question

设置静态变量时出现以下错误

error: expected primary-expression before '.' token

“GameScene.h”

#ifndef __GAME_SCENE_H__
#define __GAME_SCENE_H__

class Game {
public:

    enum InteractionMode {
        EDITING,
        PLAYING };
    static Game::InteractionMode mode;
}
#endif // __GAME_SCENE_H__

“GameScene.cpp”

#include "GameScene.h"

Game *Game::singleton() {
    if (_GameSingleton == NULL) {
        _GameSingleton = Game::create();
        Game::mode = Game::InteractionMode.PLAYING;   //error on this line
    }
    return _GameSingleton;
}

Answer 1

代替

Game::mode = Game::InteractionMode.PLAYING

直接写

Game::mode = PLAYING

另外，由于mode是static，你必须在类外定义它，添加:

Game::InteractionMode Game::mode;