实例化问题

Object.Instantiate

public static Object Instantiate(Object original);

public static Object Instantiate(Object original, Vector3 position, Quaternion rotation);

//实例化Prefab

  例1：

 public GameObject prefab;

 void Start()
    {
        for (int i = 0; i < 10; i++)
            Instantiate(prefab, new Vector3(i * 2.0f, 0, 0), Quaternion.identity);
    }
//

例2：
Transform theClonedExplosion;
theClonedExplosion = Instantiate(explosion) as Transform;

//脚本里面定义:

public GameObject PrefabNo;

那么,在使用这个PrefabNo做Instantiate()的时候，接收返回值变量的类型必须是GameObject：

GameObject newObject = Instantiate(myPrefab) as GameObject;

又比如prefab类型是自定义的UserObject,

public UserObject prefab;

那么在使用Instantiate()时我们需要写成：

UserObject newObject = Instantiate(myPrefab) as UserObject;

注：比较容易犯的一个错误是声明的类型是GameObject：

public GameObject myPrefab;

在Instantiate()返回值却想要用Transform,如下：

Transform newObject = Instantiate(myPrefab) as Transform;

这个时候就会出现newObject为null的问题。