Question

我已经实施application:didReceiveRemoteNotification:，以便在收到推送通知时在我的应用中存储数据但是，当我的应用程序处于后台并收到通知时，仅当我触摸顶部显示的通知横幅时才会存储数据：

相反，如果我触摸应用程序图标重新打开它，则不会存储通知内容：

仅当我将通知横幅推到最顶层时才会调用

application:didReceiveRemoteNotification:。

我使用了applicationWillEnterForeground和didFinishLaunchingWithOptions方法，在点击应用图标并调试其输入applicationWillEnterForeground时，控件无处可去。以下是didFinishLaunchingWithOptions和applicationWillEnterForeground以及didReceiveRemoteNotification的代码。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    self.isForeground = YES;

    // Let the device know we want to receive push notifications
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
    storage= [[NSMutableArray alloc]init];
    if (launchOptions != nil) {
        // launched from notification item click
        NSDictionary *userInfo = [launchOptions objectForKey: UIApplicationLaunchOptionsRemoteNotificationKey];
        if (userInfo != nil) [self HandleNotification:userInfo];
    }
    return YES;
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
    isForeground = YES;
    NSArray *subviews = [window subviews];
    for (int i = 0; i < [subviews count]; i++) {
        [[subviews objectAtIndex:i] removeFromSuperview];
    }
    //[self.window addSubview:tabBarController.view];
    [self.window makeKeyAndVisible];
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    self.window.rootViewController = self.viewController; 
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
    [self HandleNotification:userInfo]; 
}

- (void)HandleNotification:(NSDictionary *)userInfo {
    ApiWrapper *wrapper = [[ApiWrapper alloc] init];
    NSString *dteStr = [[NSString alloc] init];
    NSDate *nowdate = [NSDate date];
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    //[dateFormat setTimeZone:[NSTimeZone timeZoneWithName:@"Europe/London"]];
    [dateFormat setDateFormat:@"dd/MM/yyyy HH:mm:ss"];
    dteStr = [dateFormat stringFromDate:nowdate];
    [dateFormat release];

    NSString *notifId = [userInfo objectForKey:@"NotificationId"];
    NSData *test = self.strTest;
    NSString *strToken = [NSString stringWithFormat:@"%@", test];
    strToken = [strToken substringWithRange:NSMakeRange(1, [strToken length] - 2)];     

    [wrapper deviceResponse:notifId:dteStr:strToken];

    NSLog(@".....user info%@", userInfo);
    NSDictionary *pushInfo = [userInfo  objectForKey:@"aps"];
    NSString *alertstring = [pushInfo objectForKey:@"alert"];
    NSLog(@"Alertstring: %@", alertstring);

    [UIApplication sharedApplication].applicationIconBadgeNumber = [[[userInfo objectForKey:@"aps"] objectForKey: @"badgecount"] intValue];

    MLNotifMessage *objNotif = [[MLNotifMessage alloc] init];
    objNotif.notifText = alertstring;    
    NSDate *nowdate1 = [NSDate date];
    NSDateFormatter *dateFormat1 = [[NSDateFormatter alloc] init];
    //[dateFormat setTimeZone:[NSTimeZone timeZoneWithName:@"Europe/London"]];
    [dateFormat1 setDateFormat:@"dd/MM/yyyy HH:mm:ss"];
    objNotif.datenow = [dateFormat1 stringFromDate:nowdate1];
    [dateFormat1 release];

    NSLog(@"Date in delegate class is %@", objNotif.datenow);
    [storage addObject:objNotif];    

    if (self.isForeground) {
        NSArray *subviews = [window subviews];
        for (int i = 0; i < [subviews count]; i++) {
            [[subviews objectAtIndex:i] removeFromSuperview];
        }
        [self.window makeKeyAndVisible];
        self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
        self.window.rootViewController = self.viewController;
    }
}

Answer 1

如果点击主屏幕上的应用图标，则无法获取推送通知的数据。但有办法解决，只要应用程序进入前台，您就可以向服务器发送一个小的负载，然后请求服务器立即发送推送通知。

Also take a look at this : your question is possibly duplicate of it.

希望这会对你有所帮助。

Answer 2

通常，您的应用不应要求正常操作的推送通知内容。 Apple甚至不保证会发送推送通知（如果设备不可用，它将会丢弃最新的通知）。

您的应用应始终与服务器通信，以获取用户数据的权威状态（或您呈现的任何内容）。如果您确实收到推送通知，您当然可以将其用作更新或显示新信息的提示。但即使用户正常点击您的应用图标（因此没有通知），您也应该联系服务器以获取或更新您需要的所有内容。

Answer 3

尽管这是一个较老的问题，但它在本主题中排名很高，并且从iOS7开始就有解决方案。

有一种名为application:didReceiveRemoteNotification:fetchCompletionHandler:的方法即使您的应用程序在后台也会被调用。

我遇到的问题是它没有被调用。然后我发现this article并意识到我必须在项目的功能中启用“远程通知”才能使其正常工作。

希望这有帮助。

当我的应用程序处于后台时，仅当我触摸顶部通知横幅并且在我单击应用程序图标时不工作时才会处理推送通知

3 个答案: