c# – 按钮单击无法正常工作

我不知道我做错了什么2D项目有两个对象.一个有RigidBody2D和BoxCollider2D组件.第二个对象只有BoxCollider2D.当按下按钮Object1落在Object2上并且再次销毁和实例化Object1时,底部有一个按钮.但是当Object1 Instantiate然后单击按钮不起作用.错误就像这样：

Rigidbody2D类型的对象已被破坏,但您仍在尝试访问它.您的脚本应该检查它是否为null或者您不应该销毁该对象.

对象1：

对象2：

按钮单击：

对象1脚本：

public class Object1 : MonoBehaviour {

    public static Object1 instance;

    [SerializeField]
    private Rigidbody2D body;

    [SerializeField]
    private bool hasdropped;

    [SerializeField]
    private bool click;

    [SerializeField]
    private float PointerPos;

    [SerializeField]
    private float BorderX;

    void Awake(){

        if (instance == null) {

            instance = this;
        }

        //take width of screen
        Vector3 gameScreen = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width,Screen.height,0));

        BorderX = gameScreen.x - 0.6f;




        body.isKinematic = true;
        click = true;
        hasdropped = true;


    }



    void FixedUpdate () {

        if (click) {

            Vector3 temp = transform.position;

            PointerPos = Camera.main.ScreenToWorldPoint(Input.mousePosition).x;

            temp.x = Mathf.Clamp(PointerPos,-BorderX,BorderX);

            body.position = temp;

            if(hasdropped){
                return;

            }

        }


    }

    public void ButtonClick(){

        body.isKinematic = false;

    }


}

对象2脚本：

public class Object2 : MonoBehaviour {

    [SerializeField]
    private GameObject BallClone;




    void OnCollisionEnter2D(Collision2D target){

        Destroy (target.gameObject);

        Instantiate (BallClone,new Vector3(0f,2f,59f),Quaternion.identity);


    }

}

using UnityEngine;
using System.Collections;

public class Object2 : MonoBehaviour {

    [SerializeField]
    private GameObject BallClone;

    public GameObject mine;


    void OnCollisionEnter2D(Collision2D target){

        Destroy (target.gameObject);

        mine = Instantiate (BallClone,Quaternion.identity) as GameObject;


    }




public void ButtonClick(){
//this is just an example. You might wanna to cache this info for better practice and not call GetComponent all the time
            mine.GetComponent<Rigidbody2D> ().isKinematic = false;
        }




}

mine = Instantiate (BallClone,Quaternion.identity) as GameObject;