Advanced implementation guide

This optional, advanced implementation guide covers ways to leverage notification content app extensions to get the most out of your push messages.

This guide provides three example implementations of notification content app extensions, each with a concept walkthrough, potential use cases, and a look into how push notification variables may look and be used in the Braze dashboard:

• Interactive push notification
• Personalized push notifications
• Information capture push notifications

This article also provides guidance on logging analytics for these custom implementations.

Note that this implementation guide is centered around a Swift implementation, but Objective-C snippets are provided for those interested.

Notification content app extensions

Notification content app extensions provide you a great option for push notification customization. Notification content app extensions display a custom interface for your app’s notifications when a push notification is expanded.

Push notifications can be expanded in three different ways:

• A long press on the push banner
• Swiping down on the push banner
• Swiping the banner to the left and selecting “View”

These custom views offer smart ways to engage customers by displaying distinct types of content, including interactive notifications, notifications populated with user data, and even push messages that can capture information like phone numbers and email. One of our well-known features at Braze, Push Stories, are a prime example of what a push notification content app extension can look like!

Requirements

• Push notifications successfully integrated in your app
• The following files generated by Xcode based on your coding language:

Swift

• NotificationViewController.swift
• MainInterface.storyboard

Objective-C

• NotificationViewController.h
• NotificationViewController.m
• MainInterface.storyboard

Interactive push notification

Push notifications can respond to user actions inside a content app extension. For users running iOS 12 or later, this means you can turn your push notifications into fully interactive messages! This provides an exciting option to introduce interactivity to your promotions and applications. For example, your push notification can include a game for users to play, a spin-to-win wheel for discounts, or a “like” button to save a listing or song.

The following example shows a push notification where users are able to play a match game inside the expanded notification.

Dashboard configuration

To create an interactive push notification, you must set a custom view in your dashboard.

1. From the Campaigns page, click Create Campaign to start a new push notification campaign.
2. On the Compose tab, toggle on Notification Buttons.
3. Enter a custom iOS category in the iOS Notification Category field.
4. In the .plist of your Notification Content Extension Target, set the UNNotificationExtensionCategory attribute to your custom iOS category. The value given here must match what is set in the Braze dashboard under iOS Notification Category.
5. Set the UNNotificationExtensionInteractionEnabled key to true to enable user interactions in a push notification.

Ready to log analytics?

Visit the Logging Analytics section to get a better understanding of how the flow of data should look.

Personalized push notifications

Push notifications can display user-specific information inside a content extension. This allows you to create user-focused push content, such as adding the option to share your progress across different platforms, show unlocked achievements, or display onboarding checklists. This example shows a push notification displayed to a user after they have completed a specific task in the Braze Learning course. By expanding the notification, the user can see their progress through their learning path. The information provided here is user-specific and can be fired off as a session is completed or a specific user action is taken by leveraging an API trigger.

Dashboard configuration

To create a personalized push notification, you must set a custom view in your dashboard.

1. From the Campaigns page, click Create Campaign to start a new push notification campaign.
2. On the Compose tab, toggle on Notification Buttons.
3. Enter a custom iOS category in the iOS Notification Category field.
4. In the Settings tab, create key-value pairs using standard Liquid. Set the appropriate user attributes you want the message to show. These views can be personalized based on specific user attributes of a specific user profile.
5. In the .plist of your Notification Content Extension Target, set the UNNotificationExtensionCategory attribute to your custom iOS category. The value given here must match what is set in the Braze dashboard under iOS Notification Category.

Handling key-value pairs

The method didReceive is called when the notification content app extension has received a notification. This method can be found within the NotificationViewController. The key-value pairs provided in the dashboard are represented in the code through the use of a userInfo dictionary.

Parsing Key-Value Pairs from Push Notifications

• swift
• objective-c

1
2
3
4
5
6
7
8
9
func didReceive(_ notification: UNNotification) {
  let userInfo = notification.request.content.userInfo
     
  guard let value = userInfo["YOUR-KEY-VALUE-PAIR"] as? String,
        let otherValue = userInfo["YOUR-OTHER-KEY-VALUE-PAIR"] as? String,
  else { fatalError("Key-Value Pairs are incorrect.")}
 
  ...
}

1
2
3
4
5
6
7
8
9
10
11
- (void)didReceiveNotification:(nonnull UNNotification *)notification {
  NSDictionary *userInfo = notification.request.content.userInfo;
   
  if (userInfo[@"YOUR-KEY-VALUE-PAIR"] && userInfo[@"YOUR-OTHER-KEY-VALUE-PAIR"]) {
 
  ...
 
  } else {
    [NSException raise:NSGenericException format:@"Key-Value Pairs are incorrect"];
  }
}

Ready to log analytics?

Visit the Logging Analytics section to get a better understanding of how the flow of data should look.

Information capture push notification

Push notifications can capture user information inside a content app extension, pushing the limits of what is possible with a push. Requesting user input through push notifications allows you to not only request basic information like name or email, but also prompt users to submit feedback or complete an unfinished user profile.

In the following flow, the custom view is able to respond to state changes. Those state change components are represented in each image.

1. User receives a push notification.
2. Push is opened. After expanded, the push prompts the user for information. In this example, the user’s email address is requested, but you could request any sort of information.
3. Information is provided, and if in the expected format, the registration button is shown.
4. Confirmation view is displayed, and push gets dismissed.

Dashboard configuration

To create an information capture push notification, you must set a custom view in your dashboard.

1. From the Campaigns page, click Create Campaign to start a new push notification campaign.
2. On the Compose tab, toggle on Notification Buttons.
3. Enter a custom iOS category in the iOS Notification Category field.
4. In the Settings tab, create key-value pairs using standard Liquid. Set the appropriate user attributes you want the message to show.
5. In the .plist of your Notification Content Extension Target, set the UNNotificationExtensionCategory attribute to your custom iOS category. The value given here must match what is set in the Braze dashboard under iOS Notification Category.

As seen in the example, you may also include an image in your push notification. To do this, you must integrate rich notifications, set the notification style in your campaign to Rich Notification, and include a rich push image.

Handling button actions

Each action button is uniquely identified. The code checks if your response identifier is equal to the actionIndentifier, and if so, knows that the user clicked the action button.

Handling Push Notification Action Button Responses

• swift
• objective-c

1
2
3
4
5
6
7
func didReceive(_ response: UNNotificationResponse, completionHandler completion: @escaping (UNNotificationContentExtensionResponseOption) -> Void) {
  if response.actionIdentifier == "YOUR-REGISTER-IDENTIFIER" {
    // do something
  } else {
    // do something else
  }
}

1
2
3
4
5
6
7
- (void)didReceiveNotificationResponse:(UNNotificationResponse *)response completionHandler:(void (^)(UNNotificationContentExtensionResponseOption))completion {
  if ([response.actionIdentifier isEqualToString:@"YOUR-REGISTER-IDENTIFIER"]) {
    completion(UNNotificationContentExtensionResponseOptionDismiss);
  } else {
    completion(UNNotificationContentExtensionResponseOptionDoNotDismiss);
  }
}

Dismissing pushes

Push notifications can be automatically dismissed from an action button press. There are three pre-built push dismissal options that we recommend:

1. completion(.dismiss) - Dismisses the notification
2. completion(.doNotDismiss) - Notification stays open
3. completion(.dismissAndForward) - Push dismisses and the user gets forwarded into the application

Ready to log analytics?

Visit the following section to get a better understanding of how the flow of data should look.

Logging analytics

Logging with the Braze API (recommended)

Logging analytics can be done in real-time with the help of the Braze API /users/track endpoint. To log analytics, send down the braze_id value in the key-value pairs field (as seen in the following screenshot) to identify which user profile to update.

Logging manually

Logging manually will require you to first configure workspaces within Xcode, and then create, save, and retrieve analytics. This will require some custom developer work on your end. The following code snippets shown will help address this.

It’s important to note that analytics are not sent to Braze until the mobile application is subsequently launched. This means that, depending on your dismissal settings, there often exists an indeterminate period of time between when a push notification is dismissed and the mobile app is launched and the analytics are retrieved. While this time buffer may not affect all use cases, you should consider this impact adjust your user journey as necessary to include opening the application to address this concern.

Step 1: Configure app groups within Xcode

In Xcode, add the App Groups capability. If you haven’t had any workspaces in your app, go to the capability of the main app target, turn on the App Groups, and click the + Add button. Then, use your app’s bundle ID to create the workspace. For example, if your app’s bundle ID is com.company.appname, you can name your workspace group.com.company.appname.xyz. Make sure the App Groups are turned on for both your main app target and the content extension target.

Step 2: Integrate code snippets

The following code snippets are a helpful reference on how to save and send custom events, custom attributes, and user attributes. This guide will be speaking in terms of UserDefaults, but the code representation will be in the form of the helper file RemoteStorage. There are additional helper files, UserAttributes and EventName Dictionary, that are used when sending and saving user attributes.

• custom events
• custom attributes
• user attributes
• helper files

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
func saveCustomEvent(with properties: [String: Any]? = nil) {
  // 1
  let customEventDictionary = Dictionary(eventName: "YOUR-EVENT-NAME", properties: properties)
  
  // 2
  let remoteStorage = RemoteStorage(storageType: .suite)
  
  // 3   
  if var pendingEvents = remoteStorage.retrieve(forKey: .pendingCustomEvents) as? [[String: Any]] {
    pendingEvents.append(contentsOf: [customEventDictionary])
    remoteStorage.store(pendingEvents, forKey: .pendingCustomEvents)
  } else {
  // 4
    remoteStorage.store([customEventDictionary], forKey: .pendingCustomEvents)
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
- (void)saveCustomEvent:(NSDictionary<NSString *, id> *)properties {
  // 1 
  NSDictionary<NSString *, id> *customEventDictionary = [[NSDictionary alloc] initWithEventName:@"YOUR-EVENT-NAME" properties:properties];
  
  // 2
  RemoteStorage *remoteStorage = [[RemoteStorage alloc] initWithStorageType:StorageTypeSuite];
  NSMutableArray *pendingEvents = [[remoteStorage retrieveForKey:RemoteStorageKeyPendingCustomEvents] mutableCopy];
  
  // 3 
  if (pendingEvents) {
    [pendingEvents addObject:customEventDictionary];
    [remoteStorage store:pendingEvents forKey:RemoteStorageKeyPendingCustomAttributes];
  } else {
  // 4
    [remoteStorage store:@[ customEventDictionary ] forKey:RemoteStorageKeyPendingCustomAttributes];
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
func logPendingCustomEventsIfNecessary() {
  let remoteStorage = RemoteStorage(storageType: .suite)
  guard let pendingEvents = remoteStorage.retrieve(forKey: .pendingCustomEvents) as? [[String: Any]] else { return }
  
  // 1    
  for event in pendingEvents {
    var eventName: String?
    var properties: [AnyHashable: Any] = [:]
    
  // 2
    for (key, value) in event {
      if key == PushNotificationKey.eventName.rawValue {
  // 3      
        if let eventNameValue = value as? String {
          eventName = eventNameValue
        } else {
          print("Invalid type for event_name key")
        }
      } else {
  // 4 
        properties[key] = value
      }
    }
  // 5    
    if let eventName = eventName {
      AppDelegate.braze?.logCustomEvent(eventName, properties: properties)
    }
  }

  // 6    
  remoteStorage.removeObject(forKey: .pendingCustomEvents)
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
- (void)logPendingEventsIfNecessary {
  RemoteStorage *remoteStorage = [[RemoteStorage alloc] initWithStorageType:StorageTypeSuite];
  NSArray *pendingEvents = [remoteStorage retrieveForKey:RemoteStorageKeyPendingCustomEvents];
  
  // 1 
  for (NSDictionary<NSString *, id> *event in pendingEvents) {
    NSString *eventName = nil;
    NSMutableDictionary *properties = [NSMutableDictionary dictionary];
    
  // 2 
    for (NSString* key in event) {
      if ([key isEqualToString:@"event_name"]) {
  // 3       
        if ([[event objectForKey:key] isKindOfClass:[NSString class]]) {
          eventName = [event objectForKey:key];
        } else {
          NSLog(@"Invalid type for event_name key");
        }
      } else {
  // 4 
        properties[key] = event[key];
      }
    }
  // 5  
    if (eventName != nil) {
      [AppDelegate.braze logCustomEvent:eventName properties:properties];
    }
  }

  // 6  
  [remoteStorage removeObjectForKey:RemoteStorageKeyPendingCustomEvents];
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
func saveCustomAttribute() {
  // 1 
  let customAttributeDictionary: [String: Any] = ["YOUR-CUSTOM-ATTRIBUTE-KEY": "YOUR-CUSTOM-ATTRIBUTE-VALUE"]
  
  // 2 
  let remoteStorage = RemoteStorage(storageType: .suite)
  
  // 3 
  if var pendingAttributes = remoteStorage.retrieve(forKey: .pendingCustomAttributes) as? [[String: Any]] {
    pendingAttributes.append(contentsOf: [customAttributeDictionary])
    remoteStorage.store(pendingAttributes, forKey: .pendingCustomAttributes)
  } else {
  // 4 
    remoteStorage.store([customAttributeDictionary], forKey: .pendingCustomAttributes)
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
- (void)saveCustomAttribute {
  // 1 
  NSDictionary<NSString *, id> *customAttributeDictionary = @{ @"YOUR-CUSTOM-ATTRIBUTE-KEY": @"YOUR-CUSTOM-ATTRIBUTE-VALUE" };
  
  // 2  
  RemoteStorage *remoteStorage = [[RemoteStorage alloc] initWithStorageType:StorageTypeSuite];
  NSMutableArray *pendingAttributes = [[remoteStorage retrieveForKey:RemoteStorageKeyPendingCustomAttributes] mutableCopy];
  
  // 3
  if (pendingAttributes) {
    [pendingAttributes addObject:customAttributeDictionary];
    [remoteStorage store:pendingAttributes forKey:RemoteStorageKeyPendingCustomAttributes];
  } else {
  // 4 
    [remoteStorage store:@[ customAttributeDictionary ] forKey:RemoteStorageKeyPendingCustomAttributes];
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
func logPendingCustomAttributesIfNecessary() {
  let remoteStorage = RemoteStorage(storageType: .suite)
  guard let pendingAttributes = remoteStorage.retrieve(forKey: .pendingCustomAttributes) as? [[String: Any]] else { return }
     
  // 1
  pendingAttributes.forEach { setCustomAttributesWith(keysAndValues: $0) }
  
  // 4 
  remoteStorage.removeObject(forKey: .pendingCustomAttributes)
}
   
func setCustomAttributesWith(keysAndValues: [String: Any]) {
  // 2 
  for (key, value) in keysAndValues {
  // 3
    if let value = value as? [String] {
      setCustomAttributeArrayWithKey(key, andValue: value)
    } else {
      setCustomAttributeWithKey(key, andValue: value)
    }
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
- (void)logPendingCustomAttributesIfNecessary {
  RemoteStorage *remoteStorage = [[RemoteStorage alloc] initWithStorageType:StorageTypeSuite];
  NSArray *pendingAttributes = [remoteStorage retrieveForKey:RemoteStorageKeyPendingCustomAttributes];
   
  // 1
  for (NSDictionary<NSString*, id> *attribute in pendingAttributes) {
    [self setCustomAttributeWith:attribute];
  }

  // 4 
  [remoteStorage removeObjectForKey:RemoteStorageKeyPendingCustomAttributes];
}
 
- (void)setCustomAttributeWith:(NSDictionary<NSString *, id> *)keysAndValues {
  // 2
  for (NSString *key in keysAndValues) {
  // 3 
    [self setCustomAttributeWith:key andValue:[keysAndValues objectForKey:key]];
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
func saveUserAttribute() {
  // 1 
  guard let data = try? PropertyListEncoder().encode(UserAttribute.userAttributeType("USER-ATTRIBUTE-VALUE")) else { return }
  
  // 2       
  let remoteStorage = RemoteStorage(storageType: .suite)
  
  // 3    
  if var pendingAttributes = remoteStorage.retrieve(forKey: .pendingUserAttributes) as? [Data] {
    pendingAttributes.append(contentsOf: [data])
    remoteStorage.store(pendingAttributes, forKey: .pendingUserAttributes)
  } else {
  // 4 
    remoteStorage.store([data], forKey: .pendingUserAttributes)
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
- (void)saveUserAttribute {
  // 1 
  UserAttribute *userAttribute = [[UserAttribute alloc] initWithUserField:@"USER-ATTRIBUTE-VALUE" attributeType:UserAttributeTypeEmail];
   
  NSError *error;
  NSData *data = [NSKeyedArchiver archivedDataWithRootObject:userAttribute requiringSecureCoding:YES error:&error];

  if (error != nil) {
    // log error
  }
  // 2  
  RemoteStorage *remoteStorage = [[RemoteStorage alloc] initWithStorageType:StorageTypeSuite];
  NSMutableArray *pendingAttributes = [[remoteStorage retrieveForKey:RemoteStorageKeyPendingUserAttributes] mutableCopy];
  
  // 3 
  if (pendingAttributes) {
    [pendingAttributes addObject:data];
    [remoteStorage store:pendingAttributes forKey:RemoteStorageKeyPendingUserAttributes];
  } else {
  // 4 
    [remoteStorage store:@[data] forKey:RemoteStorageKeyPendingUserAttributes];
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
func logPendingUserAttributesIfNecessary() {
  let remoteStorage = RemoteStorage(storageType: .suite)
  guard let pendingAttributes = remoteStorage.retrieve(forKey: .pendingUserAttributes) as? [Data] else { return }
  
  // 1    
  for attributeData in pendingAttributes {
  // 2 
    guard let userAttribute = try? PropertyListDecoder().decode(UserAttribute.self, from: attributeData) else { continue }
    
  // 3    
    switch userAttribute {
    case .email(let email):
      user?.email = email
    }
  }
  // 4   
  remoteStorage.removeObject(forKey: .pendingUserAttributes)
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
- (void)logPendingUserAttributesIfNecessary {
  RemoteStorage *remoteStorage = [[RemoteStorage alloc] initWithStorageType:StorageTypeSuite];
  NSArray *pendingAttributes = [remoteStorage retrieveForKey:RemoteStorageKeyPendingUserAttributes];
  
  // 1  
  for (NSData *attributeData in pendingAttributes) {
    NSError *error;
  
  // 2 
    UserAttribute *userAttribute = [NSKeyedUnarchiver unarchivedObjectOfClass:[UserAttribute class] fromData:attributeData error:&error];

    if (error != nil) {
      // log error
    }
    
  // 3  
    if (userAttribute) {
      switch (userAttribute.attributeType) {
        case UserAttributeTypeEmail:
          [self user].email = userAttribute.userField;
          break;
      }
    }
  }
  // 4 
  [remoteStorage removeObjectForKey:RemoteStorageKeyPendingUserAttributes];
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
enum RemoteStorageKey: String, CaseIterable {
   
  // MARK: - Notification Content Extension Analytics
  case pendingCustomEvents = "pending_custom_events"
  case pendingCustomAttributes = "pending_custom_attributes"
  case pendingUserAttributes = "pending_user_attributes"
}
 
enum RemoteStorageType {
  case standard
  case suite
}
 
class RemoteStorage: NSObject {
  private var storageType: RemoteStorageType = .standard
  private lazy var defaults: UserDefaults = {
    switch storageType {
    case .standard:
      return .standard
    case .suite:
      return UserDefaults(suiteName: "YOUR-DOMAIN-IDENTIFIER")!
    }
  }()
   
  init(storageType: RemoteStorageType = .standard) {
    self.storageType = storageType
  }
   
  func store(_ value: Any, forKey key: RemoteStorageKey) {
    defaults.set(value, forKey: key.rawValue)
  }
   
  func retrieve(forKey key: RemoteStorageKey) -> Any? {
    return defaults.object(forKey: key.rawValue)
  }
   
  func removeObject(forKey key: RemoteStorageKey) {
    defaults.removeObject(forKey: key.rawValue)
  }
   
  func resetStorageKeys() {
    for key in RemoteStorageKey.allCases {
      defaults.removeObject(forKey: key.rawValue)
    }
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
@interface RemoteStorage ()
 
@property (nonatomic) StorageType storageType;
@property (nonatomic, strong) NSUserDefaults *defaults;
 
@end
 
@implementation RemoteStorage
 
- (id)initWithStorageType:(StorageType)storageType {
  if (self = [super init]) {
    self.storageType = storageType;
  }
  return self;
}
 
- (void)store:(id)value forKey:(RemoteStorageKey)key {
  [[self defaults] setValue:value forKey:[self rawValueForKey:key]];
}
 
- (id)retrieveForKey:(RemoteStorageKey)key {
  return [[self defaults] objectForKey:[self rawValueForKey:key]];
}
 
- (void)removeObjectForKey:(RemoteStorageKey)key {
  [[self defaults] removeObjectForKey:[self rawValueForKey:key]];
}
 
- (void)resetStorageKeys {
  [[self defaults] removeObjectForKey:[self rawValueForKey:RemoteStorageKeyPendingCustomEvents]];
  [[self defaults] removeObjectForKey:[self rawValueForKey:RemoteStorageKeyPendingCustomAttributes]];
  [[self defaults] removeObjectForKey:[self rawValueForKey:RemoteStorageKeyPendingUserAttributes]];
}
 
- (NSUserDefaults *)defaults {
  if (!self.defaults) {
    switch (self.storageType) {
      case StorageTypeStandard:
        return [NSUserDefaults standardUserDefaults];
        break;
      case StorageTypeSuite:
        return [[NSUserDefaults alloc] initWithSuiteName:@"YOUR-DOMAIN-IDENTIFIER"];
    }
  } else {
    return self.defaults;
  }
}
 
- (NSString*)rawValueForKey:(RemoteStorageKey)remoteStorageKey {
    switch(remoteStorageKey) {
    case RemoteStorageKeyPendingCustomEvents:
      return @"pending_custom_events";
    case RemoteStorageKeyPendingCustomAttributes:
      return @"pending_custom_attributes";
    case RemoteStorageKeyPendingUserAttributes:
      return @"pending_user_attributes";
    default:
      [NSException raise:NSGenericException format:@"Unexpected FormatType."];
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
enum UserAttribute: Hashable {
  case email(String?)
}
 
// MARK: - Codable
extension UserAttribute: Codable {
  private enum CodingKeys: String, CodingKey {
    case email
  }
   
  func encode(to encoder: Encoder) throws {
    var values = encoder.container(keyedBy: CodingKeys.self)
     
    switch self {
    case .email(let email):
      try values.encode(email, forKey: .email)
    }
  }
   
  init(from decoder: Decoder) throws {
    let values = try decoder.container(keyedBy: CodingKeys.self)
     
    let email = try values.decode(String.self, forKey: .email)
    self = .email(email)
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
@implementation UserAttribute
 
- (id)initWithUserField:(NSString *)userField attributeType:(UserAttributeType)attributeType {
  if (self = [super init]) {
    self.userField = userField;
    self.attributeType = attributeType;
  }
  return self;
}
 
- (void)encodeWithCoder:(NSCoder *)encoder {
  [encoder encodeObject:self.userField forKey:@"userField"];
  [encoder encodeInteger:self.attributeType forKey:@"attributeType"];
}
 
- (id)initWithCoder:(NSCoder *)decoder {
  if (self = [super init]) {
    self.userField = [decoder decodeObjectForKey:@"userField"];
     
    NSInteger attributeRawValue = [decoder decodeIntegerForKey:@"attributeType"];
    self.attributeType = (UserAttributeType) attributeRawValue;
  }
  return self;
}
 
@end

1
2
3
4
5
6
7
8
9
10
11
12
extension Dictionary where Key == String, Value == Any {
  init(eventName: String, properties: [String: Any]? = nil) {
    self.init()
    self[PushNotificationKey.eventName.rawValue] = eventName
     
    if let properties = properties {
      for (key, value) in properties {
        self[key] = value
      }
    }
  }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
@implementation NSDictionary (Helper)
 
- (id)initWithEventName:(NSString *)eventName properties:(NSDictionary *)properties {
  self = [self init];
  if (self) {
    dict[@"event_name"] = eventName;
     
    for(id key in properties) {
      dict[key] = properties[key];
    }
  }
  return self;
}
 
@end