我正在尝试发布本地通知，以便在收到远程通知时更改标签栏项目上的角标(Badge)编号。如果在应用程序打开时收到通知，我下面的 else 语句将完美触发。但是，如果应用程序在后台运行，我的前两个 if 语句似乎永远不会触发？

AppDelegate.m

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{

    if(application.applicationState == UIApplicationStateInactive) {

        [[NSNotificationCenter defaultCenter] postNotificationName:@"pushNotification" object:nil userInfo:userInfo];

        NSLog(@"Inactive - the user has tapped in the notification when app was closed or in background");

        completionHandler(UIBackgroundFetchResultNewData);
    }
    else if (application.applicationState == UIApplicationStateBackground) {

        [[NSNotificationCenter defaultCenter] postNotificationName:@"pushNotification" object:nil userInfo:userInfo];

        NSLog(@"application Background - notification has arrived when app was in background");
        NSString* contentAvailable = [NSString stringWithFormat:@"%@", [[userInfo valueForKey:@"aps"] valueForKey:@"content-available"]];

        if([contentAvailable isEqualToString:@"1"]) {

            NSLog(@"content-available is equal to 1");
            completionHandler(UIBackgroundFetchResultNewData);
        }
    }
    else {

        [[NSNotificationCenter defaultCenter] postNotificationName:@"pushNotification" object:nil userInfo:userInfo];

        NSLog(@"application Active - notication has arrived while app was opened");

        completionHandler(UIBackgroundFetchResultNewData);
    }
}

或者:我也尝试了下面的代码，同样的问题...

-(void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {

    UIApplicationState state = [application applicationState];
    if (state == UIApplicationStateActive) {

        [[NSNotificationCenter defaultCenter] postNotificationName:@"pushNotification" object:nil userInfo:userInfo];

        NSLog(@"App notification received!");
        // do stuff when app is active

    }else{

        static int i=1;
        [UIApplication sharedApplication].applicationIconBadgeNumber = i++;


        NSLog(@"App notification received background!");
    }
}

修复(对于那些使用 Drupal 的人):将以下内容添加到 push_notifications.admin.inc(Drupal 推送通知文件)**

$payload['content-available'] = 1;

最佳答案

在您的推送通知负载中添加 content-available=1。 Further reading

关于iOS/Obj-C - didReceiveRemoteNotification 语句没有触发？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45220732/