我的 class 似乎每次尝试访问私有变量时都会崩溃。 不知道为什么

Question

所以我已经在这个问题上停留了大约 3 个小时。 我觉得我错过了一件明显的事情，但它就是想不通。

我的 add_Vec function 不断使程序崩溃。

#ifndef VECCONTAIN_H
#define VECCONTAIN_H

#include <SDL.h>
#include <SDL_image.h>
#include <stdio.h>
#include <string>
#include <iostream>
#include <vector>

#include <CollisionVec/CollisionContain.h>

class VecContain
{
    public:
        VecContain();
        virtual ~VecContain();

    void add_Vec(CollisionContain*, int);
    CollisionContain* get_Vec(int, int);
    bool delete_Vec(int, int);

    int val_SolidOverWorld();
    int val_Enemy();
    int val_Player();
    int val_EnemyAttack();
    int val_PlayerAttack();
    int val_GenAttack();
    int val_Effect();


protected:
    void updateMarker();
    int getMarker();
    int UniqueIDMaker;

    std::vector< std::vector<CollisionContain*>> genVec;

    int SolidOverWorld = 0;
    int Enemy = 1;
    int Player = 2;
    int EnemyAttack = 3;
    int PlayerAttack = 4;
    int GenAttack = 5;
    int Effect = 6;

    int TotalSize = 7;



};

#endif // VECCONTAIN_H

现在，header 看起来不错，但是 cpp 文件崩溃了？

#include "CollisionVec/VecContain.h"
#include "CollisionVec/CollisionContain.h"

#include <SDL.h>
#include <SDL_image.h>
#include <stdio.h>
#include <string>
#include <iostream>
#include <vector>

VecContain::VecContain()
{
    //ctor
    for(int i = 0; i < this->TotalSize; ++i)
    {
        this->genVec.push_back(std::vector<CollisionContain*>() );
    }
    this->UniqueIDMaker = 0;
}

VecContain::~VecContain()
{
    //dtor
}

void VecContain::add_Vec(CollisionContain* vtem, int loc)
{
    //These Lines Don't Work????

    this->updateMarker();
    vtem->setID(getMarker());
    this->genVec.at(loc).push_back(vtem);

    //above this

}

CollisionContain* VecContain::get_Vec(int ID, int loc)
{
    int length = this->genVec.at(loc).size();
    for(int i = 0; i < length; ++i)
    {
        if(this->genVec.at(loc).at(i)->checkID(ID) )
        {
            i = length;
            return this->genVec.at(loc).at(i);
        }
    }
    return nullptr;
}

bool VecContain::delete_Vec(int ID, int loc)
{
    int length = this->genVec.at(loc).size();
    for(int i = 0; i < length; ++i)
    {
        if(this->genVec.at(loc).at(i)->checkID(ID) )
        {
            i = length;
            std::swap(this->genVec.at(loc).at(i) , this->genVec.at(loc).at(this->genVec.at(loc).size() - 1));
            delete this->genVec.at(loc).at(this->genVec.at(loc).size() - 1);
            this->genVec.at(loc).pop_back();
            return true;
        }
    }
    return false;
}

int VecContain::val_SolidOverWorld()
{
    return this->SolidOverWorld;
}

int VecContain::val_Enemy()
{
    return this->Enemy;
}

int VecContain::val_Player()
{
    return this->Player;
}

int VecContain::val_EnemyAttack()
{
    return this->EnemyAttack;
}

int VecContain::val_PlayerAttack()
{
    return this->PlayerAttack;
}

int VecContain::val_GenAttack()
{
    return this->GenAttack;
}

int VecContain::val_Effect()
{
    return this->Effect;
}

void VecContain::updateMarker()
{
    this->UniqueIDMaker = this->UniqueIDMaker + 1;
}

int VecContain::getMarker()
{
    return this->UniqueIDMaker;
}

我包含了所有代码，因为我没有看到任何错误，但它一直在崩溃。 我想知道是否有人可以帮助我弄清楚我在哪里搞砸了。

请，谢谢。