How do you create custom notifications in Swift 3?

Question

In Objective-C, a custom notification is just a plain NSString, but it\'s not obvious in the WWDC version of Swift 3 just what it should be.

Answer 1

This is just reference

// Add observer:
NotificationCenter.default.addObserver(self,
    selector: #selector(notificationCallback),
    name: MyClass.myNotification,
    object: nil)

    // Post notification:
    let userInfo = ["foo": 1, "bar": "baz"] as [String: Any]
    NotificationCenter.default.post(name: MyClass.myNotification,
        object: nil,
        userInfo: userInfo)