![]() There are two ways to exit the Universal Login screen. If the user enters an invalid email address/password combination, it displays an error message and gives them another chance to log in: It gives your applications a self-contained login box with several features to provide a great user experience. The Universal Login page saves you from having to code your own authentication system. If you’re worried that using Auth0’s Universal Login means that your app’s login screen will be stuck with the default Auth0 “look and feel,” I have good news for you: you can customize it to match your app or organization’s brand identity. After logging in, Google returns you to the web application as a logged-in user. ![]() These services redirect you to log in using. If you use Google web applications such as Gmail and YouTube, you’ve seen this in action. When you use Auth0 to add login/logout capability to your apps, you delegate authentication to an Auth0-hosted login page. It appears in a web browser view embedded in your app: Pressing the Continue button on the alert box takes the user to the Auth0 Universal Login screen. iOS automatically displays the alert to let users know their personal data is being shared as part of the login process. iOS’ privacy policy requires the user to be informed when an app is sending or receiving personal information about the user from a third party (Auth0 in this case). The app delegates the login process to Auth0, and after the user logs in, Auth0 sends information to the app about the user, such as their name, email address, and the URL for the user’s photo. However, before that happens, the user will see an alert box: Pressing the Log In button starts the process that leads to the Auth0 Universal Login screen. The buttons in the app use the Filled button style. iOS 15 introduced four pre-defined button styles, three of which provide a background that lets the user know that it is indeed a button. Note that the buttons look like buttons instead of blue text. When you launch the completed app, you’ll see a greeting, a Log In button, and a disabled Log Out button: While logged in, the user will be able to see the following information from their user profile: I’ve purposely kept it as simple as possible to keep the focus on authentication. You’ll use Auth0 to build a single-screen iOS app that allows users to log in and log out. This article is about adding login and logout to UIKit apps. You program UIKit apps imperatively, which means that you define how the app moves between states, how the UI should change appearance when the app changes state, and how the app should behave in different states. You then connect those elements to variables and methods in the app’s view controllers using outlets and actions. ![]()
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