Spawning several random objects in several random positions only when a scene begins

Question

I want spawning several random objects in several random positions only when a scene begins. How can I do it? This is my code, but only appears one object.

using UnityEngine;
using System.Collections;

public class SpawnItems : MonoBehaviour
{
    public Transform[] SpawnPoints;
    public GameObject[] Objetos;

    void Start () 
    {
        int spawnindex = Random.Range (0, SpawnPoints.Length);
        int objectindex = Random.Range (0, Objetos.Length);

        Instantiate (Objetos [objectindex], SpawnPoints [spawnindex].position, SpawnPoints [spawnindex].rotation);
    }

}

Answer 1

I made a function to do exactly this for a game I'm working on.

public List<GameObject> spawnPositions;
public List<GameObject> spawnObjects;   

void Start()
{
    SpawnObjects();
}

void SpawnObjects()
{
    foreach(GameObject spawnPosition in spawnPositions)
    {
        int selection = Random.Range(0, spawnObjects.Count);
        Instantiate(spawnObjects[selection], spawnPosition.transform.position, spawnPosition.transform.rotation);
    }
}

The way it works is you place your different locations in a list, and all of the different prefabs of objects you want to spawn in a separate list, then the loop spawns a random object at each of the different positions.

Remember to put:

using System.Collections.Generic;

At the top of the class in order to use Lists. You could also use Arrays for this, but I personally prefer lists.

And the Start() function is only ever called once per object, so this code will only run once each time the scene is loaded.