Xcode – Create a share sheet in iOS 15 with swiftUI

I think you would be best served using SwiftUI APIs directly. Generally, I would follow these steps.

1. Create SwiftUI View named ActivityView that adheres to UIViewControllerRepresentable. This will allow you to bring UIActivityViewController to SwiftUI.
2. Create an Identifiable struct to contain the text you’d like to display in the ActivityView. Making this type will allow you to use the SwiftUI sheet API and leverage SwiftUI state to tell the app when a new ActivityView to be shown.
3. Create an optional @State variable that will hold on to your Identifiable text construct. When this variable changes, the sheet API will perform the callback.
4. When the button is tapped, update the state of the variable set in step 3.
5. Use the sheet API to create an ActivityView which will be presented to your user.

The code below should help get you started.

import UIKit
import SwiftUI

// 1. Activity View
struct ActivityView: UIViewControllerRepresentable {
    let text: String

    func makeUIViewController(context: UIViewControllerRepresentableContext<ActivityView>) -> UIActivityViewController {
        return UIActivityViewController(activityItems: [text], applicationActivities: nil)
    }

    func updateUIViewController(_ uiViewController: UIActivityViewController, context: UIViewControllerRepresentableContext<ActivityView>) {}
}

// 2. Share Text
struct ShareText: Identifiable {
    let id = UUID()
    let text: String
}

struct ContentView: View {
    // 3. Share Text State
    @State var shareText: ShareText?
    
    var body: some View {
        VStack {
            Button("Show Activity View") {
                // 4. New Identifiable Share Text
                shareText = ShareText(text: "Hola 😀")
            }
            .padding()
        }
        // 5. Sheet to display Share Text
        .sheet(item: $shareText) { shareText in
            ActivityView(text: shareText.text)
        }
    }
}