 @objc
 open class DKPhotoGallery: UINavigationController, UIViewControllerTransitioningDelegate {
 	
-	open var items: [DKPhotoGalleryItem]?
+    open var items: [DKPhotoGalleryItem]?
     
     open var dismissImageViewBlock: ((_ dismissIndex: Int) -> UIImageView?)?
     
-	open var presentingFromImageView: UIImageView?
+    open var presentingFromImageView: UIImageView?
     open var presentationIndex = 0
     
     open var singleTapMode = DKPhotoGallerySingleTapMode.toggleControlView

        if let statusBar = UIApplication.shared.value(forKey: key) as? UIView {
            self.statusBar = statusBar
        }
	}
    
    open override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        self.statusBar?.alpha = 0
        self.modalPresentationCapturesStatusBarAppearance = true
        self.setNeedsStatusBarAppearanceUpdate()
    }

    open override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)

        self.modalPresentationCapturesStatusBarAppearance = false
        self.setNeedsStatusBarAppearanceUpdate()
    }

    open var customPreviewActions: [Any]? // [UIPreviewAction]
    
    open var transitionController: DKPhotoGalleryTransitionController?
    
    internal var statusBar: UIView?
    internal weak var contentVC: DKPhotoGalleryContentVC!
    
    open override func viewDidLoad() {
        super.viewDidLoad()
        
        self.view.backgroundColor = UIColor.black
        
        self.navigationBar.barStyle = .blackTranslucent
        self.isNavigationBarHidden = true
        
        let contentVC = DKPhotoGalleryContentVC()
        self.contentVC = contentVC
        
        contentVC.singleTapBlock = { [weak self] in
