FindGameObjectsWithTag

public class FindTags : MonoBehaviour
{
    public GameObject[] cubes;
    void Start()
    {
        cubes = GameObject.FindGameObjectsWithTag("Player");

        foreach (var obj in cubes)
            Debug.Log(obj.name);
    }
}

​​Invoke​​​ ​​InvokeRepeating​​

public class InvokeAndInvokeRepeating : MonoBehaviour
{
    
    public GameObject target;
    
    void Start()
    {
        // 2秒后执行函数
        Invoke("SpawnObject", 2);
        
        // 5秒后执行函数，往后每隔3秒执行一次函数
        InvokeRepeating("SpawnObject", 5, 3);
    }

    void SpawnObject()
    {
        float x = Random.Range(-2.0f, 2.0f);
        float z = Random.Range(-2.0f, 2.0f);
        // 克隆游戏对象
        Instantiate(target, new Vector3(x, 2, z), Quaternion.identity);
    }
    
}

Instantiate

public class UsingInstantiate : MonoBehaviour
{
    
    public GameObject cubePrefab;
    
    void Update ()
    {
        if(Input.GetKeyDown(KeyCode.Space))
        {
            GameObject rocketInstance = Instantiate(cubePrefab, cubePrefab.transform.position, cubePrefab.transform.rotation);
            rocketInstance.GetComponent<Rigidbody>().AddForce(cubePrefab.transform.forward * 5000); // 提供力
            Destroy(rocketInstance, 1.5f); // 1.5秒后销毁游戏对象
        }
    }
    
}