當我的應用程序處於后台時，僅當我觸摸頂部通知橫幅並且在我單擊應用程序圖標時不工作時才會處理推送通知

Question

我已經實現了application:didReceiveRemoteNotification:在收到推送通知時將數據存儲在我的應用程序中。
但是，當我的應用程序處於后台並且收到通知時，僅當我觸摸頂部顯示的通知橫幅時才會存儲數據：

相反，如果我觸摸應用程序圖標以重新打開它，則不會存儲通知的內容：

application:didReceiveRemoteNotification:僅當我將通知橫幅推到頂部時才會調用。

我已經使用了applicationWillEnterForeground和didFinishLaunchingWithOptions方法，同時單擊應用程序圖標並調試其輸入的applicationWillEnterForeground和控件無處可去。 這是didFinishLaunchingWithOptions和applicationWillEnterForeground以及didReceiveRemoteNotification的代碼。

- (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

如果點擊主屏幕上的應用程序圖標，則無法獲取推送通知的數據。 但是有辦法解決，只要應用程序進入前台，您就可以向服務器發送一個小的負載，然后請求服務器立即發送推送通知。

另外看看這個：你的問題可能是重復的。

希望這對你有所幫助。

Answer 2

通常，您的應用程序不應要求正常操作的推送通知內容。 Apple甚至不保證會發送推送通知（如果設備不可用，它將會丟棄最新的通知）。

您的應用應始終與服務器通信，以獲取用戶數據的權威狀態（或您呈現的任何內容）。 如果您確實收到推送通知，您當然可以將其用作更新或顯示新信息的提示。 但即使用戶正常點擊您的應用圖標（因此沒有通知），您也應該聯系服務器以獲取或更新您需要的所有內容。

Answer 3

即使這是一個較老的問題，它在這個主題中排名很高，並且從iOS7開始就有一個解決方案。

有一個名為application的方法：didReceiveRemoteNotification：fetchCompletionHandler：即使你的應用程序在后台也會被調用。

我遇到的問題是它沒有被調用。 然后我發現了這篇文章並意識到我必須在我的項目功能中啟用“遠程通知”才能使其正常工作。

希望這可以幫助。