@interface YourAppDelegate (MRGS)
@end
@implementation YourAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
    // MRGService settings
    MRGServiceParams *mrgsParams = [[MRGServiceParams alloc] initWithAppId: <MRGS_APP_ID> secret: <CLIENT_SECRET>];
    mrgsParams.allowPushNotificationHooks = YES; // Enable notifications
    mrgsParams.shouldResetBadge = YES; //Reset the number on the icon when expanded

    //Further MRGS setup and initialization
    // ...
}

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [MRGService application:application didFinishLaunchingWithOptions:launchOptions];
    return YES;
}

//Set up a general delegate without dividing by the type of notifications received (local or Push)
[MRGSNotificationCenter currentCenter].delegate = self; //Where self - an object implementing the MRGSNotificationCenterDelegate protocol

- (void)didReceiveNotification:(MRGSNotification* _Nonnull)notification{ //Receiving
    NSLog(@"Received notification: %@", [notification description]);
}
- (void)didClickOnNotification:(MRGSNotification* _Nonnull)notification{ //Clicking
    NSLog(@"Clicked on notification: %@", [notification description]);
}

//Delegate setup
[MRGSNotificationCenter currentCenter].authorizationDelegate = self;

//Receiving callback
- (void)didRequestUserNotificationsAuthorizationWithResult:(BOOL)granted {
    NSLog(@"Received notifiication that %@",[NSString stringWithFormat:@"User has %@ app to send notifications", granted ? @"granted" : @"not granted"]);
}

MRGSNotification* notification = [MRGSNotification new];

notification.identifier = @"..."; //Unique notification identifier.
notification.title = @"....."; //Notification header.
notification.subtitle = @"....."; //Notification subtitle.
notification.body = @"....."; //The body of the notification. (The main text of the notification.)
notification.badge = 2; //Number on the application icon. If nil - the number will not change, if 0 - the number will be hidden. Default value - 1.

notification.userInfo = @{....}; //Additional information added to the notification. (payload for Push notifications is located in this field)

//Setting up the trigger rule (read below for more details about MRGSNotificationTrigger)
notification.trigger = [MRGSNotificationTrigger triggerWithTimeInterval:7 repeats:NO]; //In this case, the notification will be displayed after 7 seconds.

[MRGSNotification notificationWithTitle:@"..." body:@"..." identifier:@"..." trigger:TRIGGER]; //where TRIGGER is an object of MRGSNotificationTrigger class
[MRGSNotification notificationWithTitle:@"..." body:@"..."  trigger:TRIGGER];

[MRGSNotification notificationWithTitle:@"..." body:@"..." identifier:@"..." fireDate:DATE]; //where DATE is an object of NSDate class
[MRGSNotification notificationWithTitle:@"..." body:@"..."  fireDate:DATE]; //where DATE is an object of NSDate class

//Creating the kMRGSTimeIntervalTrigger trigger
MRGSNotificationTrigger* trigger = [MRGSNotificationTrigger triggerWithTimeInterval:70 repeats:NO]; //Will trigger after 70 seconds.

//Creating the kMRGSDateComponentsTrigger trigger
NSDateComponents* dateComponents = [[NSDateComponents alloc] init];
dateComponents.hour = 13;
dateComponents.minute = 00;
MRGSNotificationTrigger* trigger = [MRGSNotificationTrigger triggerWithDateComponents:dateComponents repeats:FALSE]; //Will trigger at 13 hours 00 minutes.

//Creating kMRGSLocationTrigger trigger
MRGSLocation* location = [MRGSLocation locationWithCenterX:55.797004 centerY:37.537710 radius:50]; //Set the geographic area of operation
MRGSNotificationTrigger* trigger = [MRGSNotificationTrigger triggerWithLocation:location notifyOnEntry:TRUE notifyOnExit:TRUE repeats:FALSE]; //Will trigger on entering and leaving the specified area.

MRGSNotificationTrigger* trigger = [MRGSNotificationTrigger triggerWithDate:[NSDate dateWithTimeIntervalSinceNow:7]];

[[MRGSNotificationCenter currentCenter] addNotification:notification];

//Ð’ AppDelegate.m:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [MRGService application:application didFinishLaunchingWithOptions:launchOptions];
}

//Anywhere:
[MRGSNotificationCenter currentCenter].delegate = self;

//Sending:
MRGSNotification* notification = [MRGSNotification new];
notification.title = @"Test local notification";
notification.body = @"Test local body";
notification.identifier = @"TestNotificationIdentifier1";
notification.userInfo = @{@"UserInfoTestKey" : @"UserInfoTestValue"};

notification.trigger = [MRGSNotificationTrigger triggerWithTimeInterval:70 repeats:NO];

[[MRGSNotificationCenter currentCenter] addNotification:notification];

//Receiving:
- (void)didReceiveNotification:(MRGSNotification* _Nonnull)notification{
    NSLog(@"Received notification: %@", [notification description]);
    BOOL isRemote = notification.trigger.triggerType == kMRGSRemoteTrigger;
    NSLog(@"This notification is %@", isRemote ? @"Remote" : @"Local");
}
- (void)didClickOnNotification:(MRGSNotification* _Nonnull)notification{
    NSLog(@"Clicked on notification: %@", [notification description]);
    BOOL isRemote = notification.trigger.triggerType == kMRGSRemoteTrigger;
    NSLog(@"This notification is %@", isRemote ? @"Remote" : @"Local");
}