Hello 👋 How can we help?

Set up notifications in the iOS SDK

In order to keep you informed about what is happening in the HelpCrunch SDK, we implemented several notifications.
Written by Andrew
Updated 2 weeks ago

You can see these notifications in the NSNotificationCenter. Just add your observer in viewWillAppear and don’t forget to remove it in viewWillDisappear:

ObjC:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(NAME_OF_YOUR_METHOD)
                                                 name:NAME_OF_HELPCRUNCH_SDK_EVENT
                                               object:nil];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:NAME_OF_HELPCRUNCH_SDK_EVENT
                                                  object:nil];
}

Swift:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
        
    NotificationCenter.default.addObserver(self,
                                           selector: #selector(NAME_OF_YOUR_METHOD),
                                           name: NAME_OF_HELPCRUNCH_SDK_EVENT,
                                           object: nil)
}
    
override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
        
     NotificationCenter.default.removeObserver(self,
                                               name: NAME_OF_HELPCRUNCH_SDK_EVENT,
                                               object: nil)

Most of the events will send their data such as URL or unread messages' counter in userInfo[@”data”] like this:

ObjC:

- (void)NAME_OF_YOUR_METHOD:(NSNotification *)notification {
    NSLog(@"%@", notification.userInfo[@"data"]);
}

Swift:

func NAME_OF_YOUR_METHOD(notification: NSNotification) {
    print(notification.userInfo["data"])
}

List of the events:

  • HCSURLNotification, HCSImageURLNotification, HCSFileURLNotification – when a user clicks an url, an image or a file correspondingly. URL will be in userInfo[“data”].
  • HCSUserStartedChatNotification – when a user sends the first message via chat. No userInfo attached to the event.
  • HCSUserClosedChatNotification – when a user closes a chat or a welcome screen.
  • HCSUnreadMessagesNotification – sends number of unread messages' changes each time. Expect NSNumber in userInfo[“data”]. If you need current number, you can use [HelpCrunch numberOfUnreadMessages] method.

Did this answer your question?