Share sheet in SwiftUI using UIActivityViewController

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There is no built in share sheet in SwiftUI but you can easily implement a share sheet using UIActivityViewController. UIActivityViewController is a simplified built in interface to share contents such as texts, images and URLs. You can also define custom actions as well using UIActivityViewController.

Let’s create an UIViewControllerRepresentable for UIActivityViewController and pass some text to share.

The ShareSheetView will look like –

import SwiftUI

struct ShareSheetView: UIViewControllerRepresentable {
    typealias Callback = (_ activityType: UIActivity.ActivityType?, _ completed: Bool, _ returnedItems: [Any]?, _ error: Error?) -> Void

    let activityItems: [Any]
    let applicationActivities: [UIActivity]? = nil
    let excludedActivityTypes: [UIActivity.ActivityType]? = nil
    let callback: Callback? = nil

    func makeUIViewController(context: Context) -> UIActivityViewController {
        let controller = UIActivityViewController(
            activityItems: activityItems,
            applicationActivities: applicationActivities)
        controller.excludedActivityTypes = excludedActivityTypes
        controller.completionWithItemsHandler = callback
        return controller
    }

    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {
        // nothing to do here
    }
}

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Full code

import SwiftUI

struct ContentView: View {
    @State private var isShareSheetPresented = false

     var body: some View {
           Button(action: {
                    self.isShareSheetPresented.toggle()
                }) {
                    Text("Share")
                    Image(systemName: "square.and.arrow.up")
                }
      }
}
.sheet(isPresented: $isShareSheetPresented) {
    ShareSheetView(activityItems: ["Hello World"])
}

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