UIActivityViewController in SwiftUI on Mac opens blank window

Question

Created Apr ’20

Replies 2

Boosts 0

Views 3.7k

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 SwiftUIstruct 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

	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) {}

	}

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