1.創建一個游戲工程, 命名為SRMessageGo

2.在Project視圖中創建3個文件夾, Scene文件夾、Resources文件夾和Script文件夾

3.將當前場景保存為GameScene

4.創建SendMessage、MessageToAncestor SendMessageToChildren和ReceiveAncestorMessage ReceiveChildrenMessage、ReceiveMessage游戲腳本

5.在Hierarchy視圖中創建一個空的GameObject, 命名為GameManager, 在GameManager下創建一個Cube,并把SendMessage、ReceiveMessage、ReceiveChildrenMessage、SendMessageToChildren綁定在GameManager上, 把ReceiveAncestorMessage和MessageToAncestor綁定在Cube上

6.游戲對象發送消息的方法
(1).GameObject.SendMessage(string methodName,object value,SendMessageOptions option), 是向該游戲對象上的所有Monobehavior腳本發送消息。
(2).GameObject.BroadcastMessage(string methodName,object value,SendMessageOptions option), 是向該游戲對象以及子游戲對象上的所有Monobehavior腳本發送消息。
(3).GameObject.SendMessageUpwards(string methodName,object value,SendMessageOptions option), 是向該游戲對象以及祖游戲對象上的所有Monobehavior腳本發送消息。
(4).第一個參數是消息的名稱, 游戲對象所有Monobehavior腳本里與該名稱同名的方法將被調用。
(5).第二個參數是向該方法傳遞的參數。
(6).第三個參數是是否必須有接收方法, SendMessageOptions.DontRequireReceiver不要求必須有接收方法, SendMessageOptions.RequireReceiver必須有接收方法, 沒有報錯。
7.代碼清單
using UnityEngine; public class SendMessageToChildren : MonoBehaviour {// send to children addCoin messagevoid Awake(){gameObject.BroadcastMessage("addCoin", 1000, SendMessageOptions.DontRequireReceiver);} }using UnityEngine; public class ReceiveAncestorMessage : MonoBehaviour {// receive ancestor addCoin messagevoid addCoin(int count){Debug.Log ("add " + count + " coin");} }using UnityEngine; public class SendMessageToAncestor : MonoBehaviour {// send to ancestor addCoinOver messagevoid Start () {gameObject.SendMessageUpwards ("addCoinOver", SendMessageOptions.DontRequireReceiver);} }using UnityEngine; public class ReceiveChildrenMessage : MonoBehaviour {// receive children addCoinOver messagevoid addCoinOver () {Debug.Log ("receive children addCoinOver message");} }using UnityEngine; public class SendMessage : MonoBehaviour {private bool hasFirstUpdate = false;// send UseCoin messagevoid Update (){if (!hasFirstUpdate) {hasFirstUpdate = true;gameObject.SendMessage ("UseCoin", SendMessageOptions.DontRequireReceiver);}} }using UnityEngine; public class ReceiveMessage : MonoBehaviour {// receive use coin messagevoid UseCoin(){Debug.Log ("receive use coin message");} }

8.運行游戲

總結

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