using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;
public class ParticleManager : NetworkBehaviour
{
    [SyncVar(hook = "SetParticleActive")]
    public bool active = true;

    public GameObject particle;


    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Q))
        {
            CmdPatricle(!particle.activeInHierarchy);
        }
    }

    [Command]
    public void CmdPatricle(bool isok)
    {
        active = isok;
        Debug.Log("CMD" + isok);
    }
    //bool isok 得到是已經變化後的 active
    public void SetParticleActive(bool isok)
    {
        particle.SetActive(isok);
        Debug.Log("Hook" + isok);
    }
}
 

如果上面程式碼 不加 hook

 //[SyncVar(hook = "SetParticleActive")]
    [SyncVar]
    public bool active = true;

    public GameObject particle;

    void Start()
    {
        particle = GameObject.Find("Particle System");
    }

    //public override void OnStartClient()
    //{
    //    // register client events, enable effects  
    //    NetworkServer.SpawnWithClientAuthority(gameObject, connectionToClient);

    //}

    void Update()
    {

        if (Input.GetKeyDown(KeyCode.Q))
        {
            CmdPatricle(!particle.activeInHierarchy);
            Debug.Log("End " + active);
        }
    }
    [Command]
    public void CmdPatricle(bool isok)
    {
        active = isok;
        Debug.Log("CMD" + isok);
        //因為RPC 在伺服器端呼叫（本地沒有許可權）

        RpcSetClient(active);
    }
    //bool isok 得到是已經變化後的 active
    public void SetParticleActive(bool isok)
    {
        particle.SetActive(isok);
        Debug.Log("Hook" + isok);
    }

    [ClientRpc]
    public void RpcSetClient(bool isok)
    {
        Debug.Log("Client Rpc" + isok);
        active = isok;
        particle.SetActive(isok);
        Debug.Log("Client Rpc active" + active);
    }