ConfidentialQrCodeView

public class ConfidentialQrCodeView : ImageView

This class can be used to share secrets with other devices. A cover image, that can be set using Interface builder will be displayed and the QR code will only be uncovered if the user taps or clicks on the image view and has authenticated himself.

If the cover image is shown, then the user will be asked to authenticate himself as the owner of the device, e.g., by using Face/Touch ID or by asking for the device passcode. The authentication is performed by using the LocalAuthentication framework. Therefore the authentication credentials will be handled by the operating system an cannot be intercepted by the application.

If the confidential value is shown, tapping on it will invalidate the authentication context. Therefore, in order to display the confidential value again, the user has to authenticate as the device owner anew.

  • The image that should be displayed to the user if the confidential value is hidden. The image could describe the action the user has to perform in order to unhide the confidential value, e.g., Tap to show secret.

    Declaration

    Swift

    public var coverImage: Image?
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  • The confidential value in the format of a QR Code.

    Declaration

    Swift

    public var qrCode: QRCode!
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  • Initializes an ImageView from a coded state. For example, this is called if an ImageView was added via Interface Builder. The default image (e.g., as set in Interface Builder) is taken as the cover image.

    Declaration

    Swift

    public required init?(coder aDecoder: NSCoder)

    Parameters

    coder

    The persisted state of the ConfidentialImageView.

    Return Value

    nil if coder does not contain a valid ConfidentialImageView.

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