Local notifications?

Question

My application is primarily a client for a server that does not actually have an Internet connection. It connects to the Polycom codec and manages video calls between two endpoints. This way, my application can send commands like end call, volume, etc ... However, this is my problem. I need some kind of notification when an incoming call occurs and the application is not in the foreground. Since the server does not have access to the Internet, APNS / push notifications will not work for me. I looked at something like. It seems that my client is working, but I cannot make a warning since my application is in the background.

So, besides fixing my problem, my questions are:

Can I bring my application to the forefront using the technique indicated in the link (something like what I'm doing below). From the logs you can see that this code supports my code. I know that my while loop is wrong, and in the end I will need KVO, but no matter what should not affect the answer. (one thing I don’t understand is that my whole application is working, and not just the class that I have bcClient in there?)

- (void)applicationDidEnterBackground:(UIApplication *)application
{    
     [bcClient connect];
     bgTask = [app beginBackgroundTaskWithExpirationHandler:expirationHandler];

     // Start the long-running task and return immediately.
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

          while(1) {   
               sleep(3);
               NSLog(@"held join %d",bcClient.heldjoin);

               if (bcClient.heldjoin == 602 || bcClient.heldjoin == 604 || bcClient.heldjoin == 513) {
                    NSLog(@"incoming call");
               }
          }   
     });           
}

If I cannot bring my application to the forefront, is there a way to send a notification locally (without the need for an APNS server)?

I have a feeling that this is impossible, but I decided that I would ask.

Answer 1

. .

AppDelegate.h

@interface CameleonAppDelegate : NSObject <UIApplicationDelegate> {

    CrestronClient *cClient;
    CrestronControllerValues *CCV;
    RootViewController *rootViewController;
    CrestronValues *crestronValues;

    UIBackgroundTaskIdentifier bgTask;
    dispatch_block_t expirationHandler;
    UIApplication*    app;
    BOOL showedCall;
}
@property (nonatomic, retain) IBOutlet UIWindow *window;

@property (readonly, strong, nonatomic) NSManagedObjectContext *managedObjectContext;
@property (readonly, strong, nonatomic) NSManagedObjectModel *managedObjectModel;
@property (readonly, strong, nonatomic) NSPersistentStoreCoordinator *persistentStoreCoordinator;

- (void)saveContext;
- (NSURL *)applicationDocumentsDirectory;
-(void)save;
-(void)load;
- (void)backgroundHandler;
@end

AppDelegate.m( didFinishLaunchingWithOptions applicationDidEnterBackground)

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{    
     app = [UIApplication sharedApplication];
     expirationHandler = ^{

          [app endBackgroundTask:bgTask];
          bgTask = UIBackgroundTaskInvalid;


          bgTask = [app beginBackgroundTaskWithExpirationHandler:expirationHandler];
     };


    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    NSArray *keys = [NSArray arrayWithObjects:@"IPaddress", @"PortNumber",@"IPID", nil];

    NSArray *objs = [NSArray arrayWithObjects:@"10.8.40.64", @"41794",@"3", nil];

    //10.8.30.143       10.8.40.64

    NSDictionary *dict = [NSDictionary dictionaryWithObjects:objs forKeys:keys];

    [defaults registerDefaults:dict];

     CCV = [CrestronControllerValues sharedManager];

    [CCV setIpAddress:[defaults stringForKey:@"IPaddress"]];
    [CCV setPortNumber:[defaults stringForKey:@"PortNumber"]];
    [CCV setIPID:[defaults stringForKey:@"IPID"]];


    cClient = [CrestronClient sharedManager];


     rootViewController = [[RootViewController alloc]initWithNibName:@"RootViewController" bundle:nil];
     self.window.rootViewController = rootViewController;
     [self.window makeKeyAndVisible];   

    return YES;
}


- (void)applicationDidEnterBackground:(UIApplication *)application
{
     showedCall = FALSE;
     BOOL backgroundAccepted = [[UIApplication sharedApplication] setKeepAliveTimeout:600 handler:^{ [self backgroundHandler]; }];
     if (backgroundAccepted)
     {
          NSLog(@"VOIP backgrounding accepted");
     }


     bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
          [app endBackgroundTask:bgTask];
          bgTask = UIBackgroundTaskInvalid;
     }];


     // Start the long-running task
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

          while (1) {
               sleep(4);
               //NSLog(@"BGTime left: %f", [UIApplication sharedApplication].backgroundTimeRemaining);

               if ([rootViewController isIncomingCall] && showedCall != TRUE) {
                    UILocalNotification *localNotif = [[UILocalNotification alloc] init];
                    if (localNotif) {
                         localNotif.alertBody = [NSString stringWithFormat:@"Incoming Call."];
                         localNotif.alertAction = NSLocalizedString(@"Accept Call", nil);
                         localNotif.soundName = @"alarmsound.caf";
                         localNotif.applicationIconBadgeNumber = 1;
                         [application presentLocalNotificationNow:localNotif];
                         [localNotif release];
                    }
                    showedCall = TRUE;
               }
          }
     });           
}
- (void)backgroundHandler {

     NSLog(@"### -->VOIP backgrounding callback");


     bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
          [app endBackgroundTask:bgTask];
          bgTask = UIBackgroundTaskInvalid;
     }];

     // Start the long-running task 
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

          while (1) {
               NSLog(@"BGTime left: %f", [UIApplication sharedApplication].backgroundTimeRemaining);
               [rootViewController isIncomingCall];
               sleep(1);
          }   
     });
}