Present Photo Editor using SwiftUI

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Since we are using UIKit in our example application we need to use an UIHostingController to present a SwiftUI View. The PhotoEditorSwiftUIView defined below wraps the actual PhotoEditor view to coordinate its dismissal with the presenting UIViewController. This process is not necessary for a pure SwiftUI application. You would use the PhotoEditor view directly.

Create the photo editor#

The custom PhotoEditorSwiftUIView acts as the ContentView of a pure SwiftUI application. The PhotoEditor is declared to be the only view and to be initialized with the provided photo. The dismissAction is responsible to forward the events from the PhotoEditor modifiers to the hosting UIViewController.

Handling events#

Using the onDidSave modifier allows us to register an event handler that is invoked when a user successfully exports an edited photo. The result argument passed to the closure is of type PhotoEditorResult and contains the data of the exported photo.

After performing some action with this photo, such as uploading it or saving it, we call dismissAction to exit the editor.

Likewise, if the user taps the cancel button or an error was thrown we dismiss the editor in this example.

Next Steps#


import PhotoEditorSDK
import SwiftUI
import UIKit

class ShowPhotoEditorSwiftUISwift: Example {
  override func invokeExample() {
    // Create a `Photo` from a URL to a photo in the app bundle.
    let photo = Photo(url: Bundle.main.url(forResource: "LA", withExtension: "jpg")!)

    // The steps below are not needed when integrating the SwiftUI `View`s in a SwiftUI
    // application. For SwiftUI, you can directly integrate the `PhotoEditor` instead
    // of wrapping it inside another `View` - in this example the `PhotoEditorSwiftUIView`.
    //
    // Create the `View` that hosts the photo editor.
    var photoEditor = PhotoEditorSwiftUIView(photo: photo)

    // Since we are using UIKit in this example, we need to pass a dismiss action for the
    // `View` being able to dismiss the presenting `UIViewController`.
    photoEditor.dismissAction = {
      self.presentingViewController?.dismiss(animated: true, completion: nil)
    }

    // Present the photo editor via a `UIHostingController`.
    let hostingController = UIHostingController(rootView: photoEditor)
    hostingController.modalPresentationStyle = .fullScreen
    presentingViewController?.present(hostingController, animated: true, completion: nil)
  }
}

// A `View` that hosts the `PhotoEditor` in order
// to use it in this `UIKit` example application.
struct PhotoEditorSwiftUIView: View {
  // The action to dismiss the view.
  internal var dismissAction: (() -> Void)?

  // The photo being edited.
  let photo: Photo

  var body: some View {
    PhotoEditor(photo: photo)
      .onDidSave { result in
        // The image has been exported successfully and is passed as an `Data` object in the `result.output.data`.
        // See other examples about how to save the resulting image.
        print("Received image with \(result.output.data.count) bytes")
        dismissAction?()
      }
      .onDidCancel {
        // The user tapped on the cancel button within the editor. Dismissing the editor.
        dismissAction?()
      }
      .onDidFail { error in
        // There was an error generating the photo.
        print("Editor finished with error: \(error.localizedDescription)")
        // Dismissing the editor.
        dismissAction?()
      }
      // In order for the editor to fill out the whole screen it needs
      // to ignore the safe area.
      .ignoresSafeArea()
  }
}