step2.swift

private override init() {
    super.init()
    manager = EAAccessoryManager.shared()
    findConnectedPrinter { [weak self] bool in
        if let strongSelf = self {
            strongSelf.isConnected = bool
        }
    }
    //Notifications
    disconnectNotificationObserver = NotificationCenter.default.addObserver(forName: Notification.Name.EAAccessoryDidDisconnect, object: nil, queue: nil, using: didDisconnect)
    connectedNotificationObserver = NotificationCenter.default.addObserver(forName: Notification.Name.EAAccessoryDidConnect, object: nil, queue: nil, using: didConnect)
    manager.registerForLocalNotifications()
}