henning-jh

Keybase proof

I hereby claim:

• I am henning-jh on github.
• I am henningh (https://keybase.io/henningh) on keybase.
• I have a public key ASAmRDGCvjc8UVEqP98qf_-JdHy8LLdSl1AQzjusIHO6rwo

To claim this, I am signing this object:

henning-jh

    let center = NotificationCenter.default
    let name = NSNotification.Name.ASAuthorizationAppleIDProviderCredentialRevoked
    let observer = center.addObserver(forName: name, object: nil, queue: nil) { (notification) in
        // sign user out
        // optionally guide them to sign in again
    }

henning-jh

        let userIdentifier = // get saved userIdentifier - sample app uses Keychain
        appleIDProvider.getCredentialState(forUserID: userIdentifier) { (credentialState, error) in
            switch credentialState {
            case .authorized:
                // The Apple ID credential is valid.
                break
            case .revoked:
                // The Apple ID credential is revoked.
                break
            case .notFound:

henning-jh

extension MyLoginViewController: ASAuthorizationControllerDelegate {
    func authorizationController(controller: ASAuthorizationController,    
                                   didCompleteWithAuthorization authorization: ASAuthorization) {
        if let appleIDCredential = authorization.credential as? ASAuthorizationAppleIDCredential {

            let userIdentifier = appleIDCredential.user
            let fullName = appleIDCredential.fullName
            let email = appleIDCredential.email

            // Now we have the account information.

henning-jh

extension MyLoginViewController: ASAuthorizationControllerDelegate {
     func authorizationController(controller: ASAuthorizationController, 
               didCompleteWithError error: Error) {
          // Handle error.
     }
}

henning-jh

extension MyLoginViewController: ASAuthorizationControllerPresentationContextProviding {
     func presentationAnchor(for controller: ASAuthorizationController) -> ASPresentationAnchor {
          return self.view.window!
     }
}

henning-jh

/// Prompts the user if an existing iCloud Keychain credential or Apple ID credential is found.
func performExistingAccountSetupFlows() {
    // Prepare requests for both Apple ID and password providers.
    let requests = [ASAuthorizationAppleIDProvider().createRequest(),
                    ASAuthorizationPasswordProvider().createRequest()]

    // Create an authorization controller with the given requests.
    let authorizationController = ASAuthorizationController(authorizationRequests: requests)
    authorizationController.delegate = self
    authorizationController.presentationContextProvider = self

henning-jh

@objc
func handleAuthorizationAppleIDButtonPress() {
     let request = ASAuthorizationAppleIDProvider().createRequest()
     request.requestedScopes = [.fullName, .email]

     let authorizationController = 
     ASAuthorizationController(authorizationRequests: [request])
     authorizationController.delegate = self
     authorizationController.presentationContextProvider = self
     authorizationController.performRequests()

henning-jh

import AuthenticationServices

func createButton() {
    let authorizationButton = ASAuthorizationAppleIDButton()
    authorizationButton.addTarget(self, action: 
        #selector(handleAuthorizationAppleIDButtonPress), 
        for: .touchUpInside)
    myView.addSubview(authorizationButton)
}

henning-jh

Just as a reference, here's a UICollectionView with some nice evenly spaced cells.

class ViewController: UIViewController, UICollectionViewDataSource /*, UICollectionViewDelegate */ {

	let kReuseIdentifier = "CollectionCellID"
	let kNumCellsPerRow:CGFloat = 3.0
	let kSpacer:CGFloat = 10.0
	var collectionView : UICollectionView!