The great thing about biometric authentication is that you don't get any access to fingerprints, face scans, or other secure information. Instead, the system does all the authentication for you, which keeps both your app and users safe.
If you want to take this project further, try using the
#if compiler directives from project 26 to make the
if true hack work for the simulator and be in the code at the same time as the real Touch ID/Face ID code.
If you're looking for something harder, try creating a password system for your app so that the Touch ID/Face ID fallback is more useful. You'll need to use the
addTextField() from project 5, and I suggest you save the password in the keychain!
One of the most effective motivators of success is sharing your progress with other people – when you tell folks what you're doing and what you've learned, it encourages you to come back for more, which in turn will help you reach your app development goals faster.
So, now that you've done all the hard work it's time to share your success: tell folks that you've completed this project, either by clicking the button below to start composing a tweet, or by writing your own message from scratch. This will definitely encourage you to keep learning, but it will also help other folks discover my work – thank you!
Paul Hudson is the creator of Hacking with Swift, the most comprehensive series of Swift books in the world. He's also the editor of Swift Developer News, the maintainer of the Swift Knowledge Base, and Mario Kart world champion. OK, so that last part isn't true. If you're curious you can learn more here.