查找实例化GameObject的问题

问题描述

这是我在这里的第一篇文章。我在Unity中进行乒乓球游戏，在查找实例化的gameobject球时遇到了问题，我想让它具有对AI控制第二个Paddle进行编程的位置。如下所示：

GameController.cs：

public class GameController : MonoBehavIoUr
{
public GameObject ballPrefab;

public Text score1Text;
public Text score2Text;
public float scoreCoordinates = 3.4f;

private Ball2 currentBall;
private int score1 = 0;
private int score2 = 0;

// Start is called before the first frame update
void Start()
{
    SpawnBall();
}


void SpawnBall()
{
    GameObject ballInstance = Instantiate(ballPrefab,transform);
    currentBall = ballInstance.GetComponent<Ball2>();
    currentBall.transform.position = Vector3.zero;
    score1Text.text = score1.ToString();
    score2Text.text = score2.ToString();
}



// Update is called once per frame
void Update()
{
    if (currentBall != null)
    {
        if (currentBall.transform.position.x > scoreCoordinates)
        {
            score1++;
            Destroy(currentBall.gameObject);
            SpawnBall();
        }

        if (currentBall.transform.position.x < -scoreCoordinates)
        {
            score2++;
            Destroy(currentBall.gameObject);
            SpawnBall();
        }
    }
}
}

AI.cs：

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

public class AI : MonoBehavIoUr
{
private Rigidbody2D AIrig;
private Ball2 ball;
public float speed = 1f;

// Start is called before the first frame update
void Start()
{

    ball = GetComponent<Ball2>();
    AIrig = GetComponent<Rigidbody2D>();
}

// Update is called once per frame
void Update()
{
    ball.transform.position = Vector3.zero;
    if (ball.transform.position.y > AIrig.transform.position.y)
    {
        AIrig.veLocity = new Vector2(0,speed);
    }
    else if (ball.transform.position.y > AIrig.transform.position.y)
    {
        AIrig.veLocity = new Vector2(0,-speed);
    }
}
}

Ball2.cs：

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

public class Ball2 : MonoBehavIoUr
{
public float minXspeed = 0.8f;
public float maxXspeed = 1.2f;

public float minYspeed = 0.8f;
public float maxYspeed = 1.2f;

private Rigidbody2D ballRigidbody;

// Start is called before the first frame update
void Start()
{
    ballRigidbody = GetComponent<Rigidbody2D>();
    ballRigidbody.veLocity = new Vector2(Random.Range(minXspeed,maxXspeed) * (Random.value > 0.5f ? -1 : 1),Random.Range(minYspeed,maxYspeed) * (Random.value > 0.5f ? -1 : 1));
}

// Update is called once per frame
void Update()
{

}

private void OnTriggerEnter2D(Collider2D otherCollider)
{
    if (otherCollider.tag == "Limit")
    {
        if (otherCollider.transform.position.y > transform.position.y && ballRigidbody.veLocity.y > 0)
        {
            ballRigidbody.veLocity = new Vector2(ballRigidbody.veLocity.x,-ballRigidbody.veLocity.y);
        }
        if (otherCollider.transform.position.y < transform.position.y && ballRigidbody.veLocity.y < 0)
        {
            ballRigidbody.veLocity = new Vector2(ballRigidbody.veLocity.x,-ballRigidbody.veLocity.y);
        }
    }
    else if (otherCollider.tag == "Paddle")

    {
        if (otherCollider.transform.position.x < transform.position.x && ballRigidbody.veLocity.x < 0)
        {
            ballRigidbody.veLocity = new Vector2(-ballRigidbody.veLocity.x,ballRigidbody.veLocity.y);
        }

        if (otherCollider.transform.position.x > transform.position.x && ballRigidbody.veLocity.x > 0)
        {
            ballRigidbody.veLocity = new Vector2(-ballRigidbody.veLocity.x,ballRigidbody.veLocity.y);
        }
    }
    }
}

我无法引用实例化的对象（球）。如果有人可以帮助我，我将不胜感激。

解决方法

好的，我明白了，这是解决方法：

我已经修改了AI.cs，现在看起来像这样：

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

public class AI : MonoBehaviour
{
private Rigidbody2D AIrig;
public GameObject ball;
public float speed = 1f;

// Start is called before the first frame update
void Start()
{

    
    AIrig = GetComponent<Rigidbody2D>();
}

// Update is called once per frame
void Update()
{
    ball = GameObject.Find("Ball(Clone)");
    if (ball.transform.position.y > AIrig.transform.position.y)
    {
        AIrig.velocity = new Vector2(0,speed);
    }
    else if (ball.transform.position.y < AIrig.transform.position.y)
    {
        AIrig.velocity = new Vector2(0,-speed);
    }
 }
 }

我不清楚这些脚本的附加位置。因此，我不知道您的getComponent是否可以正常工作。

如果您将脚本附加到同一对象，则

GetComponent将起作用

否则，您可以考虑使用诸如FindObjectOfType()，FindGameObjectsWithTag(string tag)，GameObject.Find("object name")之类的选项...

但是我认为最好的方法是，如果您要一个对象引用，然后将实例化的球存储到一个公共变量中，并通过它进行访问。
并且，如果要实例化多个对象，则将它们存储在GameController的公共列表中。然后在启动功能中获取游戏控制器的引用，您将可以访问这些公共变量。

find object object object