Share Sheet UIActivityViewController within SwiftUI

share_sheet_swiftui_example.swift

import SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
            Text("Hello, world!")
                .padding()
                .shareSheet(items: ["Hello world!"])
            
            Text("Hello, world!")
                .padding()
                .shareSheet(items: ["Hello world!"], excludedActivityTypes: [.postToFacebook])
          
            // OR 
          
            Text("Hello, world!")
                .padding()
                .modifier(ShareSheetModifer(shareSheetItems: ["Hello, world!"]))
            
            Text("Hello, world!")
                .padding()
                .modifier(ShareSheetModifer(shareSheetItems: ["Hello, world!"],
                                            excludedActivityTypes: [.postToFacebook]))
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

struct ShareSheetModifer: ViewModifier {
    @State private var showShareSheet: Bool = false
    @State var shareSheetItems: [Any] = []
    var excludedActivityTypes: [UIActivity.ActivityType]? = nil
    
    func body(content: Content) -> some View {
        content
            .contextMenu {
                Button(action: {
                    self.showShareSheet.toggle()
                }) {
                    Text("Share")
                    Image(systemName: "square.and.arrow.up")
                }
            }
            .sheet(isPresented: $showShareSheet, content: {
                ActivityViewController(activityItems: self.$shareSheetItems, excludedActivityTypes: excludedActivityTypes)
            })
    }
}


struct ActivityViewController: UIViewControllerRepresentable {
    @Binding var activityItems: [Any]
    var excludedActivityTypes: [UIActivity.ActivityType]? = nil
    
    func makeUIViewController(context: UIViewControllerRepresentableContext<ActivityViewController>) -> UIActivityViewController {
        let controller = UIActivityViewController(activityItems: activityItems,
                                                  applicationActivities: nil)
        
        controller.excludedActivityTypes = excludedActivityTypes
        
        return controller
    }

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


extension View {
    func shareSheet(items: [Any], excludedActivityTypes: [UIActivity.ActivityType]? = nil) -> some View {
        self.modifier(ShareSheetModifer(shareSheetItems: items, excludedActivityTypes: excludedActivityTypes))
    }
}