macOS complaining about SceneStorage

Question

Jaanus OP

Created Jul ’20

Replies 2

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Using Xcode 12 beta 2 on Big Sur beta. Having a view like this:

Code Block swiftimport SwiftUI
struct ContentView: View {
    @SceneStorage("selectedItem") var selection: String?
    var body: some View {
        NavigationView {
            List(selection: $selection) {
								… list contents
            }.listStyle(SidebarListStyle())
        }
    }
}

When I try to compile and build this on macOS, I get this fatal error:

Code Block Fatal error: @SceneStorage is only for use with SwiftUI App Lifecycle.: file SwiftUI, line 0

I am definitely using the SwiftUI App Lifecycle because this is a fresh new project created with Multiplatform app template.

Why do I get this error? Can I fix it somehow?

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Answer 1

Etresoft OP

Jul ’20

@SceneStorage isn't supported on the Mac.

And I know what you are going to ask next. No. I don't know when it will be supported, if ever.

0

Answer 2

Jaanus OP

Jul ’20

What makes you say that it is not supported? According to API documentation, and the SwiftUI header, it also exists on Mac.

Code Block swift@available(iOS 14.0, OSX 10.16, tvOS 14.0, watchOS 7.0, *)
@propertyWrapper public struct SceneStorage<Value> : DynamicProperty {

0