Add initialCameraPosition property to the CameraViewController class.

Author: Christian Neil Anthony Wico

Sources/Controllers/CameraViewController.swift

@@ -19,6 +19,7 @@ public final class CameraViewController: UIViewController {
 
   /// Focus view type.
   public var barCodeFocusViewType: FocusViewType = .animated
+  public var initialCameraPosition: AVCaptureDevice.Position = .back
   public var showsCameraButton: Bool = false {
     didSet {
       cameraButton.isHidden = showsCameraButton
@@ -213,7 +214,7 @@ public final class CameraViewController: UIViewController {
       }
 
       if error == nil {
-        strongSelf.setupSessionInput(for: .back)
+        strongSelf.setupSessionInput(for: strongSelf.initialCameraPosition)
         strongSelf.setupSessionOutput()
         strongSelf.delegate?.cameraViewControllerDidSetupCaptureSession(strongSelf)
       } else {