关于 Android ios cocos2d 中的广播监听

 

1. 关于广播监听

第一次使用是在Android中,broadcast。主要用在2个activity之间进行传递数据,发出一个广播,对这个广播有兴趣的就去监听它,做出相应的回应即可。主要是传递数据,触发机制比较好,跟全局变量或者单例有点像,但是使用场合有区别,比如2个activity之间传递数据,activity这种有生命周期的弄成全局变量和单例就不合适了。

 

 

2.Android的广播

 

发送广播:

 

 Intent intent = new Intent("OUR_BLE_CENTRAL_MANAGER_NOTIFICAION_CHANGE_STATE");
            intent.putExtra("KEY_OLD_STATE", oldState);
            intent.putExtra("KEY_NEW_STATE", newState);
            mContext.sendBroadcast(intent);

监听广播:

private void registerBleBroadcastReceiver()
    {
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("OUR_BLE_CENTRAL_MANAGER_NOTIFICAION_CHANGE_STATE");
        this.mContext.registerReceiver(mBleBroadcastReceiver, intentFilter);
    }

    private BleBroadcastReceiver mBleBroadcastReceiver;
    private class BleBroadcastReceiver extends BroadcastReceiver
    {

        @Override
        public void onReceive(Context context, Intent intent)
        {
            String action = intent.getAction();
            if (action.equals("OUR_BLE_CENTRAL_MANAGER_NOTIFICAION_CHANGE_STATE"))
            {

            }
        }
    }

通过intent 来存放和提取数据

3. IOS NotificationCenter

 

IOS中的名字不一样,使用起来差不多:

 

发送Notification

 

NSDictionary *dictionary = [[NSDictionary alloc]init];
    [[NSNotificationCenter defaultCenter] postNotificationName:@"OUR_BLE_CENTRAL_MANAGER_NOTIFICAION_CHANGE_STATE"];

监听:

 

[[NSNotificationCenter defaultCenter] addObserver:cmIos selector:@selector(bleCenterManagerNotificationChangeState:) name:@"OUR_BLE_CENTRAL_MANAGER_NOTIFICAION_CHANGE_STATE" object:nil];

-(void)bleCenterManagerNotificationChangeState:(NSNotification*)value
{
    log("bleCenterManagerNotificationChangeState");
    NSDictionary *dictionary = [value object];
    NSNumber *oldState = [dictionary objectForKey:KEY_OLD_STATE];
    NSNumber *newState = [dictionary objectForKey:KEY_NEW_STATE];
}

使用字典来传递数据

 

4. cocos2d C++中的自定义事件

 

老的版本的cocos2d也是用notification命名的,新的改了。

发生通知:

 

CustomClass retData;
Director::getInstance()->getEventDispatcher()->dispatchCustomEvent("CbCC_BLE_CENTRAL_MANAGER_NOTIFICAION_CHANGE_STATE", &retData);

接受数据:

 

_eventDispatcher->addCustomEventListener("CbCC_BLE_CENTRAL_MANAGER_NOTIFICAION_CHANGE_STATE", [this](EventCustom* event){
        CustomClass *userData = (CustomClass *)event->getUserData();
    });

可以通过自定义类来传递数据。

可以方便在不同的Scene,Layer之间进行传递数据,触发事件。Lua的语法有点不同,本质是一样的。

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