Push Notifications in iPhone application - A complete walk through...

APNS(Apple Push Notification Services), It is one of the most innovative service provided by Apple, by which App-Developers are enabled to get in touch with their users personally.

The process seems very simple but the overall backend behind is somewhat a real Apple kind work.

You can add this your application using following steps:

STEP 1: In your application go to the AppDelegate.m file and in the method applicationDidFinishLaunching, add following code,

- (void)applicationDidFinishLaunching:(UIApplication*)application

{

 // Add registration for remote notifications

 [[UIApplication sharedApplication]

 registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert |              UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)];

// Clear application badge when app launches

 application.applicationIconBadgeNumber = 0;

///////////////////////////////////////

// Your Previous code resides here…. //

///////////////////////////////////////

}

//Fetch and Format Device Token and Register Important Information to Remote Server

STEP 2: In your application go to the AppDelegate.m file  add following 2 Methods,

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)devToken {

 // code to register the device token to the provider

// Use this device token and send it to the Server which will use it to send messages to the device……………….

}

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {

 NSLog(@"Error in registration. Error: %@", error);

}

STEP 3: In your application go to the AppDelegate.m file , add following Method,

This method receives the notification.

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

 NSLog(@"remote notification: %@",[userInfo description]);

 NSDictionary *apsInfo = [userInfo objectForKey:@"aps"];

 NSString *alert = [apsInfo objectForKey:@"alert"];

 NSLog(@"Received Push Alert: %@", alert);

}