OnTriggerEnter2D 功能在 Unity2d 中不起作用和延迟

大家好。我决定在 Unity 中制作 2d 游戏，但我遇到了问题。游戏的本质是你需要控制角色并收集硬币，硬币应该每两秒出现在随机位置，当角色接触它们时应该消失。但问题是，当角色接触硬币时，OnTriggerEnter2D 事件不会触发，延迟函数“Thread.Sleep();”也不起作用。当我将它添加到代码并开始游戏时，Unity 冻结并且不响应任何点击。如何使用 OnTriggerEnter2D 和 Thread.Sleep() 解决这两个问题；

代码如下：

GameController.cs（其中包含每两秒生成硬币的代码）：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Threading;
using System.Threading.Tasks;

public class GameController : MonoBehaviour
{
    public GameObject coin;
    public static GameObject inst_obj;


    private void SpawnCoin()
    {
        int randY = Random.Range(5, -6);
        int randX = Random.Range(-3, 3);
        Vector3 spawnPosition = new Vector3(randX, randY);
        Quaternion spawnRotation = Quaternion.identity;
        inst_obj = Instantiate(coin, spawnPosition, spawnRotation) as GameObject;

    }
    private void FixedUpdate()
    {
        Thread.Sleep(2000);
        SpawnCoin();
    }
}

这是 Player.cs 脚本（包含相同的 OnTriggerEnter2D）：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

using UnityEngine.UI;
using UnityEngine.SceneManagement;
using System.Threading;
using System;
using System.Threading.Tasks;

public class Player : MonoBehaviour
{
    
    public FixedJoystick joystick;
    public float velocity = 1.0f;
    public float velocityRightLeft = 1.0f;
    private int coins1 = 0;
   
    //GameController gameController = new GameController();
    // Start is called before the first frame update
    void Start()
    {
         
    }

    // Update is called once per frame
    void FixedUpdate()
    {      
            gameObject.GetComponent<Rigidbody2D>().transform.position += new Vector3(joystick.Direction.x * velocityRightLeft * Time.fixedDeltaTime, joystick.Direction.y * velocity * Time.fixedDeltaTime, 0);
        
    }
    private  void OnTriggerEnter2D(Collider2D other)
    {
        if (other.tag.Equals("Coin"))
        {
            Destroy(GameController.inst_obj);
        }
    }



}