Add custom notification using enum way.

NotificationCenter+Enum.md

Usage

NotificationCenter.post(customeNotification: .gotFcmToken)

Extension

enum Noti: String {
    case gotFcmToken
    
    var stringValue: String {
        return "Noti" + rawValue
    }
    
    var notificationName: NSNotification.Name {
        return NSNotification.Name(stringValue)
    }
}

extension NotificationCenter {
    static func post(customeNotification name: Noti, object: Any? = nil){
        NotificationCenter.default.post(name: name.notificationName, object: object)
    }
}