数组索引超出范围错误

Question

I'm using this code to spawn a random object from an array:

using UnityEngine;
using System.Collections;

public class enemySpawner : MonoBehaviour {

    public GameObject[] enemies; 
    int enemyNo;
    public float maxPos = 6.9f;
    public float delayTimer = 0.75f;
    float timer; 

    void Start () {
        timer = delayTimer;
    }

    void Update () {

        timer -= Time.deltaTime;

        if (timer <= 0) {

            Vector3 enemyPos = new Vector3 (transform.position.x, Random.Range (5.0f, -5.5f), transform.position.z);

            //enemyNo = Random.Range (0,8);    
            enemyNo = Random.Range (0, enemies.Length);

            Instantiate (enemies[enemyNo], enemyPos, transform.rotation);
            timer = delayTimer;
        }
    }
}    

The problem is I want to do the same thing across different scenes. Each scene has a different amount of objects for the array (set in the inspector), so because they're not all the same I'm getting this error:

IndexOutOfRangeException: Array index is out of range.

Is there any way for me to do this differently? Or should I write a new script for each scene?

Answer 1

您需要获取数组的当前长度，因此不能超出当前数组范围。

enemyNo = Random.Range (0, enemies.Length)