Unity 3d 报错Object reference not set to an instance of an object

问题遇到的现象和发生背景

在用Unity 3d UGUI练习的时候，老是报NullReferenceException: Object reference not set to an instance of an object

用代码块功能插入代码，请勿粘贴截图

InputUserPassword.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class InputUserPassword : MonoBehaviour
{
public int Password;

// Start is called before the first frame update
void Start()
{
    transform.GetComponent().onValueChanged.AddListener(Change_Value);
    transform.GetComponent().onEndEdit.AddListener(End_Value);
    }

// Update is called once per frame
void Update()
{
   
}
public void Change_Value(string inputPassword)
{
    print("正在输入" + inputPassword);
}
public void End_Value(string inputPassword)
{
    print("密码" + inputPassword);
    Password = int.Parse(inputPassword);
}

}
InputButton.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class LoginButton : MonoBehaviour
{
public GameObject InputUserPassword;
public GameObject InputUserName;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{

}
public void ClickButton()
{
    if (InputUserPassword.GetComponent().Password > 0)
    {
        SceneManager.LoadScene(1);
    }
    else
    {
        print("用户名或密码不能为空");
    }
}

}

运行结果及报错内容

img

我的解答思路和尝试过的方法

反复实验，没有找到方法

我想要达到的结果

用户名和密码可以判断是否为空

典型的报空引用的错呀，在你代码的22行，检查一下是不是没有给哪个对象赋值，或者是找不到相关对象就报空了

看起来应该是InputUserPassword物体没有在inspector面板上拖拽赋值，导致下面这行报错：

img