Local Notification in iOS 10 for Objective-C and Swift 3

The way you use to work with Local Notification in iOS 9 and below is completely different in iOS 10.

Below screen grab from Apple release notes depicts this.

You can refer apple reference document https://developer.apple.com/reference/usernotifications for UserNotification.

Below is code for local notification :

Objective-C :

1. In App-delegate.h file use @import UserNotifications;

2. App-delegate should conform to UNUserNotificationCenterDelegate protocol

3. In didFinishLaunchingOptions use below code :

 UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

    [center requestAuthorizationWithOptions:(UNAuthorizationOptionBadge | UNAuthorizationOptionSound | UNAuthorizationOptionAlert)

                          completionHandler:^(BOOL granted, NSError * _Nullable error) {

                              if (!error) {

                                  NSLog(@"request authorization succeeded!");

                                  [self showAlert];

                              }

                          }];

-(void)showAlert {

    UIAlertController *objAlertController = [UIAlertController alertControllerWithTitle:@"Alert" message:@"show an alert!" preferredStyle:UIAlertControllerStyleAlert];

    

    UIAlertAction *cancelAction = [UIAlertAction

                                   actionWithTitle:@"OK"

                                   style:UIAlertActionStyleCancel

                                   handler:^(UIAlertAction *action) {

                                       NSLog(@"Ok clicked!");

                                   }];

    [objAlertController addAction:cancelAction];

    

    

    [[[[[UIApplication sharedApplication] windows] objectAtIndex:0] rootViewController] presentViewController:objAlertController animated:YES completion:^{

        

    }];

    

}

4. Now create a button in any view controller and in IBAction use below code :

 UNMutableNotificationContent *objNotificationContent = [[UNMutableNotificationContent alloc] init];

    objNotificationContent.title = [NSString localizedUserNotificationStringForKey:@“Notification!” arguments:nil];

    objNotificationContent.body = [NSString localizedUserNotificationStringForKey:@“This is local notification message!“

                                                         arguments:nil];

    objNotificationContent.sound = [UNNotificationSound defaultSound];

    

    /// 4. update application icon badge number

    objNotificationContent.badge = @([[UIApplication sharedApplication] applicationIconBadgeNumber] + 1);

    

    // Deliver the notification in five seconds.

    UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger

                                                  triggerWithTimeInterval:10.f repeats:NO];       

    

    UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@“ten”

                                                                          content:objNotificationContent trigger:trigger];

    /// 3. schedule localNotification

    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

    [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {

        if (!error) {

            NSLog(@“Local Notification succeeded“);

        }

else {

    NSLog(@“Local Notification failed“);

}

    }];

Swift 3:

1. In App-delegate.h file use import UserNotifications

2. App-delegate should conform to UNUserNotificationCenterDelegate protocol

3. In didFinishLaunchingWithOptions use below code 

 // Override point for customization after application launch.

        let center = UNUserNotificationCenter.current()

        center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in

            // Enable or disable features based on authorization.

            if((error == nil)) {

                print(“Request authorization failed!")

            }

            else {

                print(“Request authorization succeeded!")

                self.showAlert()

            }

        }

func showAlert() {

        let objAlert = UIAlertController(title: "Alert", message: "Request authorization succeeded", preferredStyle: UIAlertControllerStyle.alert)

        

        objAlert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))

        //self.presentViewController(objAlert, animated: true, completion: nil)

        

        UIApplication.shared().keyWindow?.rootViewController?.present(objAlert, animated: true, completion: nil)

    }

4. Now create a button in any view controller and in IBAction use below code :

let content = UNMutableNotificationContent()

        content.title = NSString.localizedUserNotificationString(forKey: "Hello!", arguments: nil)

        content.body = NSString.localizedUserNotificationString(forKey: "Hello_message_body", arguments: nil)

        content.sound = UNNotificationSound.default()

        content.categoryIdentifier = "notify-test"

        

        let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 5, repeats: false)

        let request = UNNotificationRequest.init(identifier: "notify-test", content: content, trigger: trigger)

        

        let center = UNUserNotificationCenter.current()

        center.add(request)