box2d - cocos2D-Box2D,CCSprite 不显示在屏幕上

Question

我想从 Sprite 中设置主体的用户数据。但主体未显示在屏幕上。 但它不起作用。我不知道为什么。 我的代码如下所示: 如果你知道问题出在哪里，请告诉我。谢谢!

 CGSize screenSize = [[CCDirector sharedDirector] winSize];
    CGPoint screenCenter = ccp(screenSize.width*0.5f, screenSize.height*0.5f);

    b2Vec2 gravity = b2Vec2(0.0f, -10.0f);
    bool allowBodiesToSleep = true;
    world = new b2World(gravity);
    world->SetAllowSleeping(allowBodiesToSleep);

    b2BodyDef bodyDef;
    bodyDef.type = b2_dynamicBody;
    bodyDef.position = [self toMeters:screenCenter];

    CCSprite *hero = [CCSprite spriteWithFile:@"hero_jump0.png"];
    hero.position = screenCenter;

    bodyDef.userData = hero;

    b2Body *body = world->CreateBody(&bodyDef);

    b2PolygonShape dynamicBox;
    dynamicBox.SetAsBox(hero.contentSize.width/PTM_RATIO*0.5f, hero.contentSize.height/PTM_RATIO*0.5f);

    b2FixtureDef fixtureDef;
    fixtureDef.shape = &dynamicBox;
    fixtureDef.density = 0.3f;
    fixtureDef.friction = 0.5f;
    fixtureDef.restitution = 0.6f;

    body->CreateFixture(&fixtureDef);

Answer 1

您尚未将 Sprite 作为子级添加到节点层次结构中。所以它在范围末尾被删除