The Apple iOS believes in implementing the most recent upgraded technology in their devices. Last year, it has launched the new iPhone X and after few months we saw the emergence of iPhone XR and iPhone XS with exciting new advanced features and functions.


The most popular functionalities among others are the integration of the Touch ID and Face Id.


Although, the tech giant has included the Touch ID long before and its available from the iPhone 5S models. This unique feature lets the user unlock their devices using their fingerprints.


Therefore, it has taken technology a step further where users don’t need to memorize their password key or the hideous lock pattern.


In the beginning, the iOS developers found it challenging to authenticate the Touch ID in iOS7 version, but after the release of the much-awaited iOS8, Apple has successfully solved this issue by offering the official support of API to use the apps.

So, let’s first begin with the integration of the touch id authentication in the iOS app.


Creating a New Project


Your first job would be to create a new project under the file menu and choosing a single view application. Now, click on the next button which will open an interface for you.

 Biometric Authentication

Source- mindinventory

Naming the Project


Now you need to name your project. For example, try naming it Biometrics Authentication. Once the project is successfully created, it's now time to Local Authentication in ViewController.Swift.


Source- Google Search

Adding Privacy Permissions


The privacy statement is which a user sees when the app wants to take permission to use the Face ID authentication. For implementing this privacy statement, you need to first choose the Info.plist file in the project navigator panel and then click on the + button that is located at the bottom of the list entry.


Next comes choosing the Privacy – Face ID Usage Description from the expected outcome of the previous program. Now, you have to add the description into the desired field as in the figure below.

Biometric Authentication

Source- Google Search

Biometric Authentication Availability


Checking the Biometric Authentication Availability for your device is very important. It is an inevitable step to follow as all iOS devices not have the facility of a fingerprint scan and don't support the integration of Touch and Facial Id


Thus, biometric authentication must always be checked at the beginning. This is applicable to both Touch and Face Id.


Check the Accessibility of Biometric


It’s important that you check the biometric availability before proceeding further.


If your device supports the Biometric Sensor, you can definitely think of implementing the fingerprint scan or the face id verification.


The below code will indicate if the device will support the Touch ID and the Face ID and also it will update the text on the authButton instance accordingly.

Biometric Authentication

Source- Google Search


Getting the Authentication from User


After you have confirmed that your device will support Touch Id, you can now go with the following command to get authentication from User.

Biometric Authentication

Source- Google Search


Application Testing Using Face Id


Now, you have integrated the Face ID, it’s time to conduct some biometric authentication tests.


Two methodologies can be followed here; the first one is using the iOS devices manually where you get the biometric support. In the second process, you need to employ a simulator environment.


For those opting the second method to conduct the Face ID integration test, then the compilation and running the app on an iPhone X simulator becomes vital.


When the app is rolled out, you have to choose the simulator’s hardware and then select the Face ID menu. But, it must be ensured that the enrolled option is enabled.


Once the test is over, you will receive an option where the app would ask your permission if you want to allow the biometric to use the Face ID or not. It will show the privacy statement that was earlier displayed.

Biometric Authentication

Source- mindinventory


We can conclude that both Touch ID as well as the Face ID is one of the most useful and attractive features introduced in the recent few models of the iPhone.

The users adore it as they feel that their devices have become smarter and more secure. There is no need to remember the password or the lock pattern to unlock the phone anymore.

You should note that Touch ID was introduced with the launch of iOS 8 and the face recognition was rolled out along with the unveiling of iPhone X last year.

About the Author

Sourabh Sharma
I am an entrepreneur doing multitasking at any given point of time. One of my niches is working as a professional Writer where I share my views and opinions. I am very honest, sincere, and up-front blogger and jot down my unbiased opinions. In general, I prefer to write without being argumentative or contradicting anyone. To bash intelligence into some brains I might sound aggressive which is not at all offending, right?

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