UserNotifications on iOS 10

AppDelegate10.m

// Make sure to include this at the top of AppDelegate.m
@import UserNotifications;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    // Check Notification Settings on launch
    [[UNUserNotificationCenter currentNotificationCenter] getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
        switch (settings.authorizationStatus) {
            // This means we have not yet asked for notification permissions
            case UNAuthorizationStatusNotDetermined:
            {
                [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) {
                    // You might want to remove this, or handle errors differently in production
                    NSAssert(error == nil, @"There should be no error");
                    if (granted) {
                        [[UIApplication sharedApplication] registerForRemoteNotifications];
                    }
                }];
            }
                break;
            // We are already authorized, so no need to ask
            case UNAuthorizationStatusAuthorized:
            {
                // Just try and register for remote notifications
                [[UIApplication sharedApplication] registerForRemoteNotifications];
            }
                break;
            // We are denied User Notifications
            case UNAuthorizationStatusDenied:
            {
                // Possibly display something to the user
                UIAlertController *useNotificationsController = [UIAlertController alertControllerWithTitle:@"Turn on notifications" message:@"This app needs notifications turned on for the best user experience" preferredStyle:UIAlertControllerStyleAlert];
                UIAlertAction *goToSettingsAction = [UIAlertAction actionWithTitle:@"Go to settings" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                    
                }];
                UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:nil];
                [useNotificationsController addAction:goToSettingsAction];
                [useNotificationsController addAction:cancelAction];
                [self.window.rootViewController presentViewController:useNotificationsController animated:true completion:nil];
                NSLog(@"We cannot use notifications because the user has denied permissions");
            }
                break;
        }
        
    }];
    
    return YES;
}

AppDelegate10.swift

// Make sure to include this at the top of AppDelegate.swift
import UserNotifications

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        // Check Notification Settings on launch
        UNUserNotificationCenter.current().getNotificationSettings { (settings) in
            switch settings.authorizationStatus {
            // This means we have not yet asked for notification permissions
            case .notDetermined:
                UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge], completionHandler: { (granted, error) in
                    // You might want to remove this, or handle errors differently in production
                    assert(error == nil)
                    if granted {
                        UIApplication.shared.registerForRemoteNotifications()
                    }
                })
            // We are already authorized, so no need to ask
            case .authorized:
                // Just try and register for remote notifications
                UIApplication.shared.registerForRemoteNotifications()
            case .denied:
                // Possibly display something to the user
                let useNotificationsAlertController = UIAlertController(title: "Turn on notifications", message: "This app needs notifications turned on for the best user experience", preferredStyle: .alert)
                let goToSettingsAction = UIAlertAction(title: "Go to settings", style: .default, handler: { (action) in
                    
                })
                let cancelAction = UIAlertAction(title: "Cancel", style: .default)
                useNotificationsAlertController.addAction(goToSettingsAction)
                useNotificationsAlertController.addAction(cancelAction)
                self.window?.rootViewController?.present(useNotificationsAlertController, animated: true)
                print("We cannot use notifications because the user has denied permissions")
            }
        }
        return true
    }

AppDelegateAll.m

// Make sure to include this at the top of AppDelegate.m
@import UserNotifications;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    // We want to check Notification Settings on launch.
    // First we must determine your iOS type:
    // Note this will only work for iOS 8 and up, if you require iOS 7 notifications then
    // contact [email protected] with your request
    float systemVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
    if (systemVersion >= 10) {
        [[UNUserNotificationCenter currentNotificationCenter] getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
            switch (settings.authorizationStatus) {
                    // This means we have not yet asked for notification permissions
                case UNAuthorizationStatusNotDetermined:
                {
                    [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) {
                        // You might want to remove this, or handle errors differently in production
                        NSAssert(error == nil, @"There should be no error");
                        if (granted) {
                            [[UIApplication sharedApplication] registerForRemoteNotifications];
                        }
                    }];
                }
                    break;
                    // We are already authorized, so no need to ask
                case UNAuthorizationStatusAuthorized:
                {
                    // Just try and register for remote notifications
                    [[UIApplication sharedApplication] registerForRemoteNotifications];
                }
                    break;
                    // We are denied User Notifications
                case UNAuthorizationStatusDenied:
                {
                    // Possibly display something to the user
                    UIAlertController *useNotificationsController = [UIAlertController alertControllerWithTitle:@"Turn on notifications" message:@"This app needs notifications turned on for the best user experience" preferredStyle:UIAlertControllerStyleAlert];
                    UIAlertAction *goToSettingsAction = [UIAlertAction actionWithTitle:@"Go to settings" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                        
                    }];
                    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:nil];
                    [useNotificationsController addAction:goToSettingsAction];
                    [useNotificationsController addAction:cancelAction];
                    [self.window.rootViewController presentViewController:useNotificationsController animated:true completion:nil];
                    NSLog(@"We cannot use notifications because the user has denied permissions");
                }
                    break;
            }
            
        }];
    } else if ((systemVersion < 10) || (systemVersion >= 8)) {
        UIUserNotificationType types = (UIUserNotificationTypeBadge | UIUserNotificationTypeSound |
                                        UIUserNotificationTypeAlert);
        UIUserNotificationSettings *mySettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
        
        [[UIApplication sharedApplication] registerUserNotificationSettings:mySettings];
    } else {
        NSLog(@"We cannot handle iOS 7 or lower in this example. Contact [email protected]");
    }
    
    return YES;
}

AppDelegateAll.swift

// Make sure to include this at the top of AppDelegate.swift
import UserNotifications

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    // We want to check Notification Settings on launch.
    // First we must determine your iOS type:
    // Note this will only work for iOS 8 and up, if you require iOS 7 notifications then
    // contact [email protected] with your request
    if #available(iOS 10, *) {
        UNUserNotificationCenter.current().getNotificationSettings { (settings) in
            switch settings.authorizationStatus {
            case .notDetermined:
                UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge], completionHandler: { (granted, error) in
                    // You might want to remove this, or handle errors differently in production
                    assert(error == nil)
                    if granted {
                        UIApplication.shared.registerForRemoteNotifications()
                    }
                })
            case .authorized:
                UIApplication.shared.registerForRemoteNotifications()
            case .denied:
                let useNotificationsAlertController = UIAlertController(title: "Turn on notifications", message: "This app needs notifications turned on for the best user experience", preferredStyle: .alert)
                let goToSettingsAction = UIAlertAction(title: "Go to settings", style: .default, handler: { (action) in
                    
                })
                let cancelAction = UIAlertAction(title: "Cancel", style: .default)
                useNotificationsAlertController.addAction(goToSettingsAction)
                useNotificationsAlertController.addAction(cancelAction)
                self.window?.rootViewController?.present(useNotificationsAlertController, animated: true)
            }
        }
    } else if #available(iOS 8, *) {
        let settings = UIUserNotificationSettings(types: [.badge, .sound, .alert], categories: nil)
        UIApplication.shared.registerUserNotificationSettings(settings)
    } else {
        print("We cannot handle iOS 7 or lower in this example. Contact [email protected]")
    }
    return true
}