UIActivityViewController in SwiftUI on Mac opens blank window

Question

Created Apr ’20

Replies 2

Boosts 0

Views 3.4k

Participants 3

I'm creating an iOS app with SwiftUI and everything works great on all platforms including OSX except for the UIActivityViewController. The controller works as expected on iOS but just displays a blank window on OSX that I can't even close. I'm passing simple text to the controller to share via email or printer.

Here is the controller struct;

struct ActivityViewController: UIViewControllerRepresentable {

    var activityItems: [Any]
    var applicationActivities: [UIActivity]? = nil

    func makeUIViewController(context: UIViewControllerRepresentableContext) -> UIActivityViewController {
        let controller = UIActivityViewController(activityItems: activityItems, applicationActivities: applicationActivities)
        return controller
    }

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

}

And I present it like this;

.sheet(isPresented: $bShare, onDismiss: {
            print("Dismiss")
        }, content: {
            Text("It's Fun to Share")
            ActivityViewController(activityItems: ["place holder"])
        })

Boost

Answer 1

midnight beep OP

Jul ’20

I'm having the same problem, did you ever find a solution?

0

Answer 2

JagCesar OP

Aug ’20

I'm seeing the same issue but on iOS (iOS 14 beta 5). Here's the code I'm currently testing with, found it somewhere on the interwebz so I take no credit for it.

Code Block languageimport 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
    }
}
struct ShareSheetView_Previews: PreviewProvider {
    static var previews: some View {
        ShareSheetView(activityItems: [URL(string: "https://volante.io")!])
    }
}

* Edit:

I just noticed that the ivar activityItems is an array of Any, which let me send a URL wrapped in a Binding<>. This is of course not share:able and this is the reason I was seeing this bug.

Maybe this is the same error you've made? To get it working I updated the code to this:

Code Block ShareSheetView(activityItems: [self.filePath.unsafelyUnwrapped])

I use unsafelyUnwrapped because I know the filePath property will always be set.

0