c++ - Box2d 销毁集合中的所有对象

Question

我正在使用 cocos2d 和 box2d，我有最多 5 个 b2bodies 需要同时销毁。它们都被添加到一个集合中 std::set<b2Body*>row1RedArray;并由 row1RedArray.insert(spriteBody); 添加，我已经通过迭代删除了数组中的所有项目，但是当我在删除它们后触摸屏幕时，我的程序就崩溃了。我是否正确地销毁了 b2Bodies？

//if that array is empty, then remove all objects from this array (row4)

if ((row4BlueArray.count == 0) && (row4.count >> 0) && (row4Removed == NO)) {
    std::set<b2Body *>::iterator pos04;
    for(pos04 = row4RedArray.begin(); pos04 != row4RedArray.end(); ++pos04) {
        b2Body *rowBody = *pos04;
        if (rowBody->GetUserData() != NULL)
        {
            for (CCSprite* sprite4 in row4) {
                [self removeChild:sprite4 cleanup:YES];
            }
            //Adding the b2Body to the toDelete Set and then removing it from the set of b2Bodies
            toDestroy.insert(rowBody);
            row4RedArray.erase(rowBody);
            row4Removed = YES;
        }
    }
}
std::set<b2Body *>::iterator pos2;
for(pos2 = toDestroy.begin(); pos2 != toDestroy.end(); ++pos2) {
    b2Body *body = *pos2;
    if (body->GetUserData() != NULL)
    {
       //Then removing the b2Body completely (this is all at the end of the tick method)
        _world->DestroyBody(body);
    }
}

Answer 1

Captain Obvlious 在评论中的解决方案很明显，但并不正确。实体应该被 world->DestroyBody() 销毁。它需要简单地遍历主体，并通过调用此方法销毁每个主体(从不为 b2Body、b2Fixture 或 b2Joint 调用 delete)。没有办法一次将它们全部摧毁。