从一个数组中统一实例化

Question

我正在尝试实例化存储在数组中的随机小行星游戏对象。但是，我遇到了一个错误，无法解决。谁能帮忙：

Assets/Scripts/GameController.cs(7,49): error CS0236: A field initializer cannot reference the nonstatic field, method, or property `GameController.asteroids'

using UnityEngine;
using System.Collections;

public class GameController : MonoBehaviour {

    int asteroids = 2;     
    GameObject[] Asteroids = new GameObject[asteroids];

    public Vector3 spawnValues;
    public int asteroidCount;
    public float spawnWait;
    public float startWait;
    public float waveWait;

    void Start () {

        //call asteroid array variables
        Asteroids [0] = gameObject.tag == "Asteroid01";
        Asteroids [1] = gameObject.tag == "Asteroid02";

        StartCoroutine (spawnWaves ());
    }

    IEnumerator spawnWaves () {

        yield return new WaitForSeconds (startWait);

        while (true) {
            for (int i = 0; i < asteroidCount; i++) {
                Vector3 spawnPosition = new Vector3 (spawnValues.x, Random.Range (-spawnValues.y, spawnValues.y), spawnValues.z);
                Quaternion spawnRotation = Quaternion.identity;

                Instantiate (Random.Range(0,1), spawnPosition, spawnRotation);
                yield return new WaitForSeconds (spawnWait);
            }
        }
    }

编辑：

我一直在玩这个，这就是我到目前为止所拥有的：

using UnityEngine;
using System.Collections;

public class GameController : MonoBehaviour {

    public GameObject[] asteroids;
    public Vector3 spawnValues;
    public int asteroidCount;
    public float spawnWait;
    public float startWait;
    public float waveWait;

    void Start () {
        asteroids = GameObject.FindGameObjectsWithTag("Asteroid");
        StartCoroutine (spawnWaves ());
    }

    IEnumerator spawnWaves () {

        while (true) {
            for (int i = 0; i < asteroidCount; i++) {
                Vector3 spawnPosition = new Vector3 (spawnValues.x, Random.Range (-spawnValues.y, spawnValues.y), spawnValues.z);
                Quaternion spawnRotation = Quaternion.identity;
                Instantiate (asteroids[i], spawnPosition, spawnRotation);
                yield return new WaitForSeconds (spawnWait);
            }
        }

Answer 1

这不是实例化游戏对象的正确方法。相反，试试这个：

Instantiate (Asteroids[i], spawnPosition, spawnRotation);

错误是第一个参数是一个游戏对象，但在你的代码中你传递了一个浮点值。还可以将 new GameObject[asteroids] 代码移到构造函数内或 Start() 方法中，或者尝试使用常量/静态 int 值。

Answer 2

您不能以这种方式使用普通变量初始化数组。 要么你可以做

const int asteroids = 2;     
GameObject[] Asteroids = new GameObject[asteroids];

或

int asteroids = 2;     
GameObject[] Asteroids;

void Start()
{
 Asteroids = new GameObject[asteroids];
}

Answer 3

你不能使用一个实例变量来初始化另一个实例变量，因为编译器不能保证初始化的顺序。

你可以在构造函数中做：

public class GameController : MonoBehaviour {

    int asteroids;     
    GameObject[] Asteroids;

    public GameController()
    {
        asteroids = 2;
        Asteroids = new GameObject[asteroids]
    }
...

或者正如cubrr在评论中所说，小行星可以是一个常数。