ios - 退出后台时不显示推送通知警报

Question

我的应用委托(delegate)中有以下代码，用于在 UIAlertView 中显示推送通知中包含的文本。

当应用程序仍在后台加载时，代码工作正常，但是，一旦应用程序退出后台，通知就不会出现。

谁能告诉我哪里出了问题，以及我需要做些什么来解决它？

应用委托(delegate).m:

@synthesize pushText;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    [Parse setApplicationId:@"hGG5RdgNVdI7eCeZynV32lWYXywQRHkpp5zLdY7Q"
                  clientKey:@"TwmNbpBYEt4u3euE3lzNIgwyroSl8RPGF2dJFsPv"];

    // Register for Push Notitications, if running iOS 8
    if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
        UIUserNotificationType userNotificationTypes = (UIUserNotificationTypeAlert |
                                                        UIUserNotificationTypeBadge |
                                                        UIUserNotificationTypeSound);
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:userNotificationTypes
                                                                                 categories:nil];
        [application registerUserNotificationSettings:settings];
        [application registerForRemoteNotifications];
    } else {
        // Register for Push Notifications before iOS 8
        [application registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge |
                                                         UIRemoteNotificationTypeAlert |
                                                         UIRemoteNotificationTypeSound)];
    }
    return YES;

    NSMutableArray *alertTextArray = [[NSUserDefaults standardUserDefaults] objectForKey:@"alertTextArray"];
    NSDictionary *notifKey = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey];

    if (notifKey)
    {
        [alertTextArray addObject:[notifKey objectForKey:@"alert"]];

    }
    [[NSUserDefaults standardUserDefaults] setObject:alertTextArray forKey:@"alertTextArray"];







}

- (void)applicationWillResignActive:(UIApplication *)application
{
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.

    PFInstallation *currentInstallation = [PFInstallation currentInstallation];
    if (currentInstallation.badge != 0) {
        currentInstallation.badge = 0;
        [currentInstallation saveEventually];
    }
}

- (void)applicationWillTerminate:(UIApplication *)application
{
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    // Store the deviceToken in the current installation and save it to Parse.
    PFInstallation *currentInstallation = [PFInstallation currentInstallation];
    [currentInstallation setDeviceTokenFromData:deviceToken];
    [currentInstallation saveInBackground];
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
    [PFPush handlePush:userInfo];
    pushText = [[userInfo objectForKey:@"aps"] objectForKey:@"alert"];
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"News", "")
                                                    message:pushText
                                                   delegate:nil
                                          cancelButtonTitle:@"Ok"
                                          otherButtonTitles: nil];
    [alert show];




}


@end

Answer 1

您的意思是当应用程序处于前台(= 运行)时，不显示通知提醒？

这实际上是设计使然以及 iOS 通知的工作方式。如果该应用程序正在运行，则不会显示通知警报，您的应用程序将以对您的应用程序有意义的方式显示它们。