ioskevinshah

override init(frame: CGRect) {
    super.init(frame: frame)
    /// Preparing UIView
    prepareUIView()
}

ioskevinshah

// MARK: - UI Related Method(s)
extension NavigationTitleDropDownButton {
  fileprivate func prepareUIView() {
  
  }
}

ioskevinshah

fileprivate var verticalStackView: UIStackView = {
    let stackView: UIStackView = UIStackView()
    stackView.translatesAutoresizingMaskIntoConstraints = false
    stackView.isUserInteractionEnabled = false
    stackView.alignment = .center
    stackView.axis = .vertical
    stackView.distribution = .equalCentering
    return stackView
}()

ioskevinshah

var lblSubTitle: UILabel = {
    var lbl: UILabel = UILabel()
    lbl.translatesAutoresizingMaskIntoConstraints = false
    lbl.backgroundColor = .clear
    lbl.textAlignment = .center
    lbl.adjustsFontSizeToFitWidth = true
    lbl.minimumScaleFactor = 0.75
    lbl.textColor = .darkGray
    lbl.font = .systemFont(ofSize: UIFont.smallSystemFontSize)
    return lbl

ioskevinshah

/// Variable Declaration(s)
var lblTitle: UILabel = {
    var lbl: UILabel = UILabel()
    lbl.translatesAutoresizingMaskIntoConstraints = false
    lbl.backgroundColor = .clear
    lbl.textAlignment = .center
    lbl.adjustsFontSizeToFitWidth = true
    lbl.minimumScaleFactor = 0.75
    lbl.textColor = .darkText
    lbl.font = .boldSystemFont(ofSize: UIFont.systemFontSize)

ioskevinshah

/// LocalAuthentication
class LocalAuthentication: NSObject {
    
    /// Variable Declaration(s)
    class var isFaceIdAvailable: Bool {
        let context: LAContext = LAContext()
        let evaluate = context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: nil)
        if #available(iOS 11.0, *) {
            return (context.biometryType == .faceID)
        }

ioskevinshah

@IBAction func tapBtnAuthenticate(_ sender: UIButton) {
    LocalAuthentication.authenticateUserWithBioMetrics(kReasonMessage) { [weak self] (authenticationState) in
        guard let self = self else {
            return
        }
        switch authenticationState {
        case .success:
            self.showAlert("Successfully Authenticated")
        case .canceledByUser, .fallback, .canceledBySystem:
            break

ioskevinshah

fileprivate static func evaluate(_ policy: LAPolicy, reason: String, context: LAContext, block: @escaping authenticationBlock) {
        context.evaluatePolicy(policy, localizedReason: reason) { (isSuccess, error) in
            block(AuthenticationBlockState.initWith(error as? LAError))
        }
    }

ioskevinshah

class func authenticateUserWithBioMetrics(_ reasonMessage: String, cancelTitle: String? = "", block: @escaping authenticationBlock) {
    let context: LAContext = LAContext()
    context.localizedCancelTitle = cancelTitle
    context.localizedFallbackTitle = "Passcode"
    evaluate(.deviceOwnerAuthentication, reason: (reasonMessage.isEmpty ? defaultReasonMessage : reasonMessage), context: context, block: block)
}

ioskevinshah

/// Block Declaration(s)
typealias authenticationBlock = ((AuthenticationBlockState) -> ())