Live face verification captures the user’s selfie for facial verification or any other purposes, after verifying the user’s physical presence in front of the device camera. The verification (using LiveFaceVerificationViewController) is returned in a Selfie object.

Ensure that you’ve added the UI library to your Podfile or View Controller. See Add the dependencies needed for your application for more information.

Initialize LiveFaceVerificationViewController

The LiveFaceVerificationViewController class is a View Controller with configurable resources, a camera implementation, and other UI components that can be directly plugged into your app with a few lines of code.

Initialize LiveFaceVerificationViewController.Builder with a completion block to receive the completion events with the result. For example:

class YourViewController: UIViewController {

    override func viewDidAppear() {
        super.viewDidAppear()
        do {
            try LiveFaceVerificationViewController.Builder { (isComplete, selfie) in
            guard isComplete,
                  let selfie = selfie else {
                // Canceled
                return
            }
            
            // Handle Selfie here
        }
        .setAccuracy(accuracy: .low)
        .setVerificationTime(verificationTime: 2.0)
        .setVerificationSteps(verificationSteps: SCLiveFaceVerificationStep.lfv_smile, SCLiveFaceVerificationStep.lfv_straight_face)
        .create().show(parentViewController: self)
        } catch {
            // Handle errors thrown by Builder here
        }
    }

}

• verificationSteps can be: .lfv_smile, .lfv_straight_face, lfv_close_left_eye, or lfv_close_right_eye.

• verificationTime must be greater than 0. The default value is 2.5 seconds.

• The default value for accuracy is SCLiveFaceVerificationAccuracy.medium. This can also be: SCLiveFaceVerificationAccuracy.low or ``SCLiveFaceVerificationAccuracy.high`.

You can initialize LiveFaceVerificationViewController with the default values like this:

LiveFaceVerificationViewController.Builder { (isComplete, selfie) in
            guard isComplete,
                  let selfie = selfie else {
                // Canceled
                return
            }
            
            // Handle Selfie here
        }
        .create().show(parentViewController: self)

By default, the SDK uses Apple’s CIDetector to find faces in the image. If you want to use another face detector, you can implement SCFaceDetector, and pass it to the Builder like this:

try? LiveFaceVerificationViewController.Builder(listener: self)
    .setFaceDetector(faceDetector: YOUR_CUSTOM_FACE_DETECTOR)
    .create()
    .show(parentViewController: self)

In the SCFaceDetector implementation, the resulting face objects must be converted to SCFace when extending SCFaceDetector.