NativeEvent-NativeHelper.md

NativeEvent / NativeHelper

该篇将介绍 Lua(C#) 与 Native(Java/OC) 通信的方式

Lua

-- 向 Native 发送消息
SendMessageToNative("这是action", "这是message")

-- 接收 Native 发来的消息
AddEventListener(Stage, NativeEvent.RECEIVE_MESSAGE, self.OnReceiveNativeMsg, self)

---@param event NativeEvent
function TestScene:OnReceiveNativeMsg(event)
    print("收到 Native 事件：", event.action, event.message)
end

Java

// 向 Unity 发送消息
shibaInu.util.NativeHelper.sendMessageToUnity("这是action", "这是message");

// 接收 Unity 发来的消息（注册回调）
int handleID = shibaInu.util.NativeHelper.registerUnityMsgCallback(this::unityMsgCallback);
// 移除回调
shibaInu.util.NativeHelper.unregisterUnityMsgCallback(handleID);

// 接收 Unity 发来的消息（匿名方式注册回调）
handleID = shibaInu.util.NativeHelper.registerUnityMsgCallback((action, msg) -> {
    Log.d("UnityMsgCallback", "act=" + action + ", msg=" + msg);
});

Obj-C

// 向 Unity 发送消息
#import "NativeHelper.h"
SendMessageToUnity(@"action", @"NSString 字符串");
SendMessageToUnity("action", "char* 字符串");

// 接收 Unity 发来的消息
#import "NativeHelper.h"
NSNotificationCenter * __weak center = [NSNotificationCenter defaultCenter];
id __block token = [center addObserverForName:UNITY_MSG_NOTIF_NAME
                                       object:nil
                                        queue:[NSOperationQueue mainQueue]
                                   usingBlock:^(NSNotification *notification) {
    NSDictionary *data = [notification object];
    NSString *act = [data objectForKey:UNITY_MSG_KEY_ACT];
    NSString *msg = [data objectForKey:UNITY_MSG_KEY_MSG];
    NSLog(@"action=%@, msg=%@", act, msg);
    [center removeObserver:token];
}];

// or

[[NSNotificationCenter defaultCenter] addObserverForName:UNITY_MSG_NOTIF_NAME
                                                  object:nil
                                                   queue:[NSOperationQueue mainQueue]
                                              usingBlock:^(NSNotification *notification) {
    NSDictionary *data = [notification object];
    NSString *act = [data objectForKey:UNITY_MSG_KEY_ACT];
    NSString *msg = [data objectForKey:UNITY_MSG_KEY_MSG];
    NSLog(@"action=%@, msg=%@", act, msg);
}];

// 使用前先了解 NSNotificationCenter:
// https://developer.apple.com/documentation/foundation/nsnotificationcenter