Question

JavaScript => SendMessageUpwards(methodName: string, options: SendMessageOptions): void;
JavaScript => SendMessageUpwards(methodName: string, value: object = null, options: SendMessageOptions = SendMessageOptions.RequireReceiver): void;
C# => void SendMessageUpwards(string methodName, SendMessageOptions options);
C# => void SendMessageUpwards(string methodName, object value = null, SendMessageOptions options = SendMessageOptions.RequireReceiver);

Parameters 参数

methodName	The name of the method to call. 调用的方法名
value	An optional parameter value to pass to the called method. 可选参数，被调用的方法传递的值
options	Should an error be raised if the method doesn't exist on the target object? 如果目标对象方法不存在，应该引发错误么？

Description 描述

Calls the method named /methodName/ on every MonoBehaviour in this game object and on every ancestor of the behaviour.

调用此游戏对象及其behaviour的父对象上所有MonoBehaviour名为methodName的方法。

The receiving method can choose to ignore the argument by having zero arguments. If the /options/ parameter is set to SendMessageOptions.RequireReceiver an error is printed when the message is not picked up by any component.

接收消息的方法可以通过不要参数的方法来选择忽略参数.当选项被设置为SendMessageOptions.RequireReceiver时，如果消息没有被任何一个组件处理，则会打印一个错误。

Note that messages will not be sent to inactive objects (ie, those that have been deactivated in the editor or with the GameObject.SetActive function).

注意，消息不会发送到非激活的对象上（如，哪些在编辑器或者通过GameObject.SetActive已经关闭的对象）。

JavaScript:

	// Calls the function ApplyDamage with a value of 5
	SendMessageUpwards ("ApplyDamage", 5.0);
 
	// Every script attached to the game object 
	// that has a ApplyDamage function will be called.
	function ApplyDamage (damage : float) {
		print (damage);
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    void ApplyDamage(float damage) {
        print(damage);
    }
    void Example() {
        SendMessageUpwards("ApplyDamage", 5.0F);
    }
}