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Present Camera using SwiftUI

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

Configure and create the view#

In order to record and access videos in the camera roll the NSCameraUsageDescription and NSPhotoLibraryUsageDescription key need to be present in your Info.plist file. In addition, for the audio track of recorded videos the NSMicrophoneUsageDescription key is also required to be present.

The custom VideoCameraSwiftUIView acts as the ContentView of a pure SwiftUI application.

First, we create several instance variables; the video to reference recorded or selected videos, a boolean variable vesdkPresented to indicate whether the editor view should be presented and a PhotoEditModel which holds the edit state of the camera view i.e. filters that have been applied.

Next, we create a configuration object setting allowedRecordingModes to [.video], since we only want to enable recording and selecting videos not photos. By default, the camera view controller does not show a cancel button, so it can be embedded into any other view controller. But since it is presented modally in this example, a cancel button should be visible.

Refer to the configuration guide for a detailed explanation of how to configure the editor.

Next, we initialize the Camera with the configuration object and use the fullScreenCover in combination with the onChange modifier to edit the video with the VideoEditor.

Handling events#

Using the onDidSave method allows us to register an event handler that is invoked when a user successfully recorded or selected a video. The result argument passed to the block is of type CameraResult and contains a URL that points to the video and a PhotoEditModel allowing us to pass on the applied filters to the editor.

Likewise, if the user taps the cancel button we dismiss the camera in this example.

Next Steps#

File:
import SwiftUI
import UIKit
import VideoEditorSDK


class ShowVideoCameraSwiftUISwift: Example {
  override func invokeExample() {
    // The steps below are not needed when integrating the SwiftUI `View`s in a SwiftUI
    // application. For SwiftUI, you can directly integrate the `Camera` and `VideoEditor`
    // instead of wrapping them inside another `View` - in this example the `VideoCameraSwiftUIView`.
    //
    // Create the `View` that hosts the camera and the video editor.
    var videoEditor = VideoCameraSwiftUIView()


    // 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`.
    videoEditor.dismissAction = {
      self.presentingViewController?.dismiss(animated: true, completion: nil)
    }


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


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


  // Create a `Video` from a URL to an image in the app bundle.
  @State private var video: Video?


  // Create a variable indicating whether the editor should be presented.
  @State private var vesdkPresented: Bool = false


  // The `PhotoEditModel` that preserves the selected filters from the camera.
  @State private var photoEditModel: PhotoEditModel?


  // Create a `Configuration` object.
  private let configuration = Configuration { builder in
    builder.configureCameraViewController { options in
      // Since we are only using VE.SDK, the camera
      // should only allow to record/select videos.
      options.allowedRecordingModes = [.video]


      // By default the camera does not show a cancel button,
      // so that it can be embedded into any other view. But since it is
      // presented modally here, a cancel button should be visible.
      options.showCancelButton = true
    }
  }


  // The body of the View.
  var body: some View {
    // Create a `Camera`.
    Camera(configuration: configuration)
      .onDidCancel {
        // The user tapped on the cancel button within the camera. Dismissing the view.
        dismissAction?()
      }
      .onDidSave { result in
        // The user has recorded or selected a video.
        photoEditModel = result.model


        // The `VideoEditorResult.url` argument will contain the url of the video.
        if let url = result.url {
          video = Video(url: url)
        }
      }
      // In order for the camera to fill out the whole screen it needs
      // to ignore the safe area.
      .ignoresSafeArea()
      .fullScreenCover(isPresented: $vesdkPresented) {
        dismissAction?()
      } content: {
        if let video = video {
          // Create a `VideoEditor`.
          VideoEditor(video: video, configuration: configuration, photoEditModel: photoEditModel)
            .onDidSave { result in
              // The user exported a new video successfully and the newly generated video is located at `result.output.url` of the returned `VideoEditorResult`. Dismissing the editor.
              print("Received video at \(result.output.url.absoluteString)")
              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 video.
              print("Editor finished with error: \(error.localizedDescription)")
              // Dismissing the editor.
              dismissAction?()
            }
            // In order for the video editor to fill out the whole screen it needs
            // to ignore the safe area.
            .ignoresSafeArea()
        }
      }
      // Listen to changes of the video in order to present
      // the editor.
      .onChange(of: video) { _ in
        vesdkPresented = true
      }
  }
}