Swignals 1.0.0

You want to add pod 'Swignals', '~> 1.0' similar to the following to your Podfile:

target 'MyApp' do
  pod 'Swignals', '~> 1.0'
end

Then run a pod install inside your terminal, or from CocoaPods.app.

Alternatively to give it a test run, run the command:

pod try Swignals

Swignals 1.0.0

By
Joseph Neuman
finder39

Swignals

Swignals is an observable pattern system written entirely in Swift.

Installing

You can either drag all the files from the Source folder into your project, or install it using CocoaPods.

Example

Lets say we wanted to add a swignal to an AudioPlayer class whenever shuffle is set. It could look something like this:

typealias OnShuffleChangedSwignal = Swignal1Arg<Bool>

class AudioPlayer {
    static let sharedInstance = AudioPlayer()

    let onShuffleChanged = OnShuffleChangedSwignal()
    var shuffle: Bool = false {
        didSet {
            onShuffleChanged.fire(shuffle)
        }
    }
}

Then to subscribe to that signal you’d do the following:

class ControlsViewController: UIViewController {
    init() {
        AudioPlayer.sharedInstance.onShuffleChanged.addObserver(self) { (observer, arg1) in
        // note: you can rename the variables in the callback such as
        // callback: { (weakSelf, shuffle) in
            if let favoriteTracksDataSource = observer.tracksDataSource as? FavoriteTracksDataSource {
                favoriteTracksDataSource.shuffle = arg1
                favoriteTracksDataSource.refresh()
            }
        }
    }

    func updateViewBasedOnShuffle(shuffle: Bool) {
        // do important things
    }
}

Authors

Joseph Neuman - Initial work

Acknowledgements

This is based on Uber’s Signals library which was written by Tuomas Artman

License

This project is licensed under the MIT License - see the LICENSE.md file for details