using UnityEngine;

public class TestPrefabs : MonoBehaviour
{
    public GameObject cubeObject;

    //void Start()
    //{
    //    Instantiate(cubeObject, transform.position, transform.rotation);
    //}

    void Update()
    {
        Instantiate(cubeObject, transform.position, transform.rotation);
    }
}

　　然后将改脚本挂在到Cube上，成为其组件的一部分，然后将预制体中的Cube填充GameObject cubeObject(将其拖动到public组件框中)