I'm working on an iOS document-based app. It uses ReferenceFileDocument and custom creation of documents via DocumentGroupLaunchScene + NewDocumentButton. It works fine when I use the plain NewDocumentButton("Whatever") (without any more arguments), but when I want to perform additional setup via preapreDocumentURL or even just add a contentType it gives such output in the console when I hit it:
Content serialization failed, document won't be saved.
UTType.replayable is correctly wired up in the plist.
It looks like a bug in the SDK, but maybe there is a chance that I'm doing something wrong?
Here's a code:
import SwiftUI
import UniformTypeIdentifiers
import Combine
@main
struct MyApp: App {
var body: some Scene {
DocumentGroup {
Document()
} editor: { documentConfiguration in
EmptyView()
}
DocumentGroupLaunchScene("Yoyo") {
NewDocumentButton(contentType: .replayable) {
return URL(string: "whatever, it doesnt even go there...")!
}
}
}
}
final class Document: ReferenceFileDocument {
static var readableContentTypes: [UTType] { [.replayable] }
@Published var x = 0
init() {}
init(configuration: ReadConfiguration) throws {}
func snapshot(contentType: UTType) throws -> Data {
Data()
}
func fileWrapper(snapshot: Data, configuration: WriteConfiguration) throws -> FileWrapper {
.init(regularFileWithContents: snapshot)
}
}
extension UTType {
static var replayable: UTType {
UTType(exportedAs: "com.whatever.yo")
}
}
Topic:
UI Frameworks
SubTopic:
SwiftUI
Tags:
Files and Storage
File Provider
SwiftUI
Uniform Type Identifiers