A reusable way to allow users to perform a multipart task in your iOS app, written in Swift.

The demo implements a wizard that allows users to sign up to use an app.

Classes in the framework make no assumption about, nor impose restrictions upon, your wizard's visual design.

Important functionality in the wizard framework has thorough unit test coverage.

Create a UIViewController subclass for every step/screen in your wizard.

Example: UsernameStepViewController

For every step in your wizard, create a type that adopts the WizardStep protocol. An instance of this type owns a wizard step view controller and collects & processes user input for that view controller.

Example: UsernameWizardStep

Note: It is possible to have wizard step view controllers adopt the WizardStep protocol, if preferred.

Adopt the WizardDataSource protocol to determine the order in which a user will view your wizard steps.

Example: SignUpWizardDataSource

Subclass WizardViewController and implement your custom UI design to navigate between wizard step views. You will need to override three methods:

func navigateToInitial(wizardStep: WizardStep)    
func navigateToNext(wizardStep: WizardStep, placement: WizardStepPlacement)
func navigateToPrevious(wizardStep: WizardStep, placement: WizardStepPlacement)

Example: SignUpWizardViewController

Create your wizard view controller and configure it with your custom data source before presenting it to the user.

@IBAction func handleShowSignUpWizardButton(sender: UIButton) {
    let storyboard = UIStoryboard(name: "SignUpWizard", bundle: nil)
    let signUpWizardVC = storyboard.instantiateInitialViewController() as! SignUpWizardViewController
    let model = SignUpWizardModel()
    let dataSource = SignUpWizardDataSource(model: model)
    
    signUpWizardVC.configureWith(dataSource, completionHandler: { [weak self] (canceled: Bool) in
        print("Completed sign up wizard. canceled = \(canceled)")
        self?.dismissViewControllerAnimated(true, completion: nil)
        })

    presentViewController(signUpWizardVC, animated: true, completion: nil)
}

Example: ViewController