PhotoController
class PhotoController : UIViewControllerPhotoController to show the taken photo before processing
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                  Photo data DeclarationSwift var imageData: Data!
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                  PhotoController view DeclarationSwift let photoView: PhotoView
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                  HomeController instance to go back on cancel DeclarationSwift weak var homeController: HomeController!
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                  Initial load DeclarationSwift override func viewDidLoad()
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                  viewWillAppear DeclarationSwift override func viewWillAppear(_ animated: Bool)
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        PhotoController Class Reference