无法使用仪器跟踪 C++ 泄漏

Question

我在我的 Objective-C 应用程序中使用 C++，并在场景中进行以下分配：

@interface Game1PlayerLayer : CCLayer {

    b2World *_world;
    GLESDebugDraw *_debugDraw;
    MyContactListener *_contactListener;
}

+(CCScene *) scene;

@end

在实施中我分配：

_world = new b2World(gravity);
_debugDraw = new GLESDebugDraw(PTM_RATIO);
_contactListener = new MyContactListener();

当然我必须用

来释放它们

delete _world;
delete _debugDraw;
delete _contactListener;

但如果我不删除它们，Xcode Leaks 工具不会显示这些泄漏。我当然检查了Game1PlayerLayer 的释放。泄漏仪器设置为 1 秒快照。如果 Xcode 能够显示 C++ 泄漏，我应该如何跟踪它们？

Answer 1

如何避免整个问题并改用std::shared_ptr？

@interface Game1PlayerLayer : CCLayer {

    std::shared_ptr<b2World> _world;
    std::shared_ptr<GLESDebugDraw> _debugDraw;
    std::shared_ptr<MyContactListener> _contactListener;
}


_world.reset(new b2World(gravity));
_debugDraw.reset(new GLESDebugDraw(PTM_RATIO));
_contactListener.reset(new MyContactListener());


#if 0
delete _world;
delete _debugDraw;
delete _contactListener;
#endif