Storyboard Dependency Injection - Example

SceneExample.swift

// First we need a scene for our ViewController
struct LandingScene: Scene {
    // Non optional, safe references to our vc's dependencies
    let client: APIClient
    let account: Account

    // Note the parameter type is the specific view controller we want to configure
    // This takes advantage of the `associatedtype` we defined in our protocol
    func configureViewController(_ viewController: LandingViewController) {
        // Inject the dependencies
        viewController.client = client
        viewController.account = account
    }
}

// Our good old ViewController
class LandingViewController {
    var client: APIClient!
    var account: Account!
}

let storyboard = UIStoryboard(name: "MyStoryboard", bundle: nil) // Get our storyboard
let scene = LandingScene(client: myClient, account: myAccount) // Create our scene
let vc = storyboard.instantiateViewController(with: scene) // Create our ViewController