import EnterpriseAppUpdater
typealias Updater = EnterpriseAppUpdater

let updater = Updater(manifest: url) // Initialize EnterpriseAppUpdater with manifest.plist URL.
updater.loadManifest { result in
    switch result {
    case .success(let manifest):
        switch updater.check(manifest: manifest) {
        case .success(let item):
            let alert = updater.alert(for: item, onStart: { _ in
                print(Updater.Message.started, item.metadata.version)
                updater.start { error in
                    print(Updater.Message.error, error)
                }
            }, onPostpone: { _ in
                print(Updater.Message.postponed, item.metadata.version)
            })
            self.present(alert, animated: true) // Use UIApplication.shared.windows.first?.rootViewController? if self is not UIViewController.
        case .failure(let error):
            switch error {
            case .noAppUpdateNeeded:
                print(Updater.Message.upToDate, error)
            default:
                print(Updater.Message.error, error)
            }
        }
    case .failure(let error):
        print(Updater.Message.error, error)
    }
}