Rowena  Waters

Rowena Waters


Notificationz: Helping You Own NotificationCenter in Swift!

Notificationz 📡

Helping you own NotificationCenter 


Keep Your Naming Conventions:
This library gives you convenient access to NotificationCenter, but it's up to you to set it up the way you like!

Nothing to Hide:
Not trying to hide NotificationCenter functionality. Just an attempt to provide a more convenient API

Full and Simple Testing:
Testing this library was simple, since it only forwards calls to NotificationCenter for the most part. Mocking that object allowed tests to reach 100% coverage.


You can try them in the playground shipped with the framework!

Use your own naming convention to wrap NotificationCenter

let nsCenter = NotificationCenter.default
let 📡 = NotificationCenterAdapter(notificationCenter: nsCenter)

// my personal preference, define this in Globals.swift
let NC = NotificationCenterAdapter(notificationCenter: nsCenter)
// Now, you can use `NC` throughout the app

Four simple keywords to remember

let obj = Object()
NC.add(obj, selector: #selector(   // normal add observer
NC.observe { notification in }                  // observe using blocks                                // post a notification
NC.remove(obj)                                  // remove from nsCenter

Transparent and convenient API

let keys = ["observe", "many", "keys"].map { Notification.Name($0) }
NC.observe(keys) { _ in }       // observe on the same thread
NC.observeUI(keys) { _ in }     // delivered to the main thread, userInfo: ["info":5]) .test, object: nil))

RAII-based observers

class Dummy {

    // declare the observer as optional
    var broadcastObserver: Observer?

    init() {
        // assign it anywhere you like
        broadcastObserver = NC.observe { [unowned self] _ in
        }.execute() // this is a neat bonus feature

    func doSomething() {
        // exectued twice, since we call "execute" manually
        print("it works!")

var dummy: Dummy? = Dummy()  // calls doSomething
dummy = nil     // clean up is automatic  // doesn't crash!

Getting Started


Carthage is fully supported. Simply add the following line to your Cartfile:

github "SwiftKitz/Notificationz"


Cocoapods is fully supported. Simply add the following line to your Podfile:

pod 'Notificationz'


For manual installation, you can grab the source directly or through git submodules, then simply:

  • Drop the Notificationz.xcodeproj file as a subproject (make sure Copy resources is not enabled)
  • Navigate to your root project settings. Under "Embedded Binaries", click the "+" button and select the Notificationz.framework


After migrating to Swift, the NotificationCenter APIs really stood out in the code. Writing so much boiler plate all over the place just to register, handle, and cleanup notifications. Coming from C++, RAII seemed a pretty invaluable pattern to be applied here.

With this framework, one can easily declare all their observers as properties:

class Sample {
    private var keyboardObserver: Observer?
    private var reachabilityObserver: Observer?

Other programmers should be pleased with this consistency! Moreover, there is no need to worry handling notifications in some other function somewhere nor do cleanup in deinit. It just works:

keyboardObserver = NC.observeUI(UIKeyboardWillShowNotification) { [unowned self] _ in
    // you can write your handler code here, maybe call another function

// you can force cleanup by setting the property to nil, but don't have to
keyboardObserver = nil

Download Details:

Author: SwiftKitz
Source code:

License: MIT license

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Notificationz: Helping You Own NotificationCenter in Swift!
Houston  Sipes

Houston Sipes


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