Notifier

More easier to use NotificationCenter.

No need to define Notification Name string, no worries about typo

Before:

NotificationCenter.default.addObserver(self, selector: #selector(handleNotification(_:)), name: NSNotification.Name(rawValue: "UserLogin"), object: nil)

NotificationCenter.default.post(name: NSNotification.Name(rawValue: "UserLogin"), object: true, userInfo: ["Name": "xxxx"])

override func handleNotification(_ notification: Notification) {
   let success = notification.object as? Bool ?? false
   let name = notification.userInfo?["name"] as? String ?? ""  //!!!should be 'Name', not 'name'
   ...
}

Emm...

Now

Define the Notification Name as you like

public enum NotifierName: String {
    case login
    case logout
    case registration = "NotificationKeyRegistration"
    ...
}

Define the Notification user info key if you need to pass some values

public enum NotifierKey: String {
    case result
    case name
    ...
}

Register

Notifier.register(.login, to: self, selector: #selector(handleNotification(_:)))

Support Notification.Name:

Notifier.register(.UIKeyboardWillShow, to: self, selector: #selector(handleKeyboardWillShow(_:)))

Remove

Notifier.unregister(.login, from: self)

Post with values

Notifier.post(.login, value: [.result: true, .name: "god"])

Handle

let success: Bool = notification.value(for: .result) ?? false
let name: String = notification.value(for: .name) ?? ""
print("notification: \(success) ---- \(name)")