SwiftUI using NSSharingServicePicker in MacOS

Question

I am trying to use a Share function inside my MacOS app in SwiftUI. I am having a URL to a file, which I want to share. It can be images/ documents and much more.

I found NSSharingServicePicker for MacOS and would like to use it. However, I am struggeling to use it in SwiftUI.

Following the documentation, I am creating it like this:

let shareItems = [...]

let sharingPicker : NSSharingServicePicker = NSSharingServicePicker.init(items: shareItems as [Any])

sharingPicker.show(relativeTo: NSZeroRect, of:shareView, preferredEdge: .minY)

My problem is in that show() method. I need to set a NSRect, where I can use NSZeroRect.. but I am struggeling with of: parameter. It requires a NSView. How can I convert my current view as NSView and use it that way. Or can I use my Button as NSView(). I am struggling with that approach.

Another option would be to use a NSViewRepresentable. But should I just create a NSView and use it for that method.

Answer 1

Here is minimal working demo example

struct SharingsPicker: NSViewRepresentable {
    @Binding var isPresented: Bool
    var sharingItems: [Any] = []

    func makeNSView(context: Context) -> NSView {
        let view = NSView()
        return view
    }

    func updateNSView(_ nsView: NSView, context: Context) {
        if isPresented {
            let picker = NSSharingServicePicker(items: sharingItems)
            picker.delegate = context.coordinator

            // !! MUST BE CALLED IN ASYNC, otherwise blocks update
            DispatchQueue.main.async {
                picker.show(relativeTo: .zero, of: nsView, preferredEdge: .minY)
            }
        }
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(owner: self)
    }

    class Coordinator: NSObject, NSSharingServicePickerDelegate {
        let owner: SharingsPicker

        init(owner: SharingsPicker) {
            self.owner = owner
        }

        func sharingServicePicker(_ sharingServicePicker: NSSharingServicePicker, didChoose service: NSSharingService?) {

            // do here whatever more needed here with selected service

            sharingServicePicker.delegate = nil   // << cleanup
            self.owner.isPresented = false        // << dismiss
        }
    }
}

Demo of usage:

struct TestSharingService: View {
    @State private var showPicker = false
    var body: some View {
        Button("Share") {
            self.showPicker = true
        }
        .background(SharingsPicker(isPresented: $showPicker, sharingItems: ["Message"]))
    }
}