Notification in Swift 3#

Starting from Swift 3, the Notification.Name type was introduced, allowing the use of Notification.Name type values instead of raw strings for notification names.

extension Notification.Name {
    static let userLoggedOut = Notification.Name("UserLoggedOut")
}
let n = Notification(name: .userLoggedOut, object: nil)

Reference: Proper Use of NotificationCenter in Swift 3 and Later

Swift-like UserDefaults#

Although UserDefaults still uses raw strings for keys, I thought it would be nice to handle them with an interface similar to the new Notification, so I wrote a lightweight library.

You can write it like this:

import BetterUserDefaults

extension UserDefaults.Key {
    static let someKey = UserDefaults.Key("someKey")
}

UserDefaults.standard.set(true, for: .someKey)
UserDefaults.standard.bool(for: .someKey) // true

Just like Notification.Name, you define and use key names with a type called UserDefaults.Key.

Source Code#

A simple code in just one file. UserDefaults+Key.swift

Thoughts#

It feels a bit off to add a library just for this, and I wish it could be like this in the standard library.

Also, I realized after writing this that there is a library with the exact same name doing something similar. (I initially named mine SwiftyUserDefaults but renamed it to BetterUserDefaults)