Question

我有一个快速的应用程序。

我从服务器收到GCM推送通知。

在IOS中，我了解操作系统会在我的应用程序位于bg时显示通知。

当我的应用程序在fg上时，如何显示推送消息（通知）并且我是负责显示通知的人？

我应该使用local-push（与远程推送相比）吗？

当应用程序在bg中时，显示推送的代码是什么？

我知道此代码处理向用户显示推送

但它不是通知，它只是打开警报

func application( application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler handler: (UIBackgroundFetchResult) -> Void) {
        print("Notification received: \(userInfo)")
        // This works only if the app started the GCM service
        GCMService.sharedInstance().appDidReceiveMessage(userInfo);
        // Handle the received message
        // Invoke the completion handler passing the appropriate UIBackgroundFetchResult value
        // [START_EXCLUDE]
        NSNotificationCenter.defaultCenter().postNotificationName(messageKey, object: nil,
            userInfo: userInfo)
        handler(UIBackgroundFetchResult.NoData);
        // [END_EXCLUDE]
}

Answer 1

您将收到通知（在userInfo中），但如果应用程序位于前台，则不会显示。您可以做的是触发本地通知或在应用程序位于前台时使用UIAlertView。

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo 
{
    application.applicationIconBadgeNumber = 0;  //For resetting the badge number to zero.           


    if (application.applicationState == UIApplicationStateActive)  //For checking if app is in foreground.        
    {                

       UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Notification received:" message:[NSString stringWithFormat:@"Received notification while app was in foreground:\n%@",[[userInfo objectForKey:@"aps"] objectForKey:@"alert"]]delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
       [alertView show];          
  }    
}

Answer 2

如果您想在应用程序位于前台时处理通知，则可以使用此类https://github.com/LeoNatan/LNNotificationsUI之类的自定义横幅。代码应如下所示：

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo 
{
    if (application.applicationState == UIApplicationStateActive) 
    {                
        LNNotification* notification = [LNNotification notificationWithMessage:@"Notification Message"];

        [[LNNotificationCenter defaultCenter] presentNotification:notification forApplicationIdentifier:@"app_identifier"];
    }
}

当我的应用在fg上时，我的应用如何发送推送通知？

2 个答案: