相关疑难解决方法(0)

处理示例应用程序。目标是从 Master 中的 CoreData 中提取一个列表，然后单击一个列表以转到详细信息，您可以在其中编辑信息并保存。当您在细节中编辑“名称”时，它不仅会更新细节以反映更改，而且还会反映母版上的更改。我已经尝试了很多方法来实现这一点，但到目前为止还没有找到答案。

// Code generation is turned OFF in the xcdatamodeld file

public class EntityName: NSManagedObject, Identifiable {
   @NSManaged public var name: String
   @NSManaged public var active: Bool
}

extension EntityName {
    static func allEntityNameFetchRequest() -> NSFetchRequest<EntityName> {
        let request: NSFetchRequest<EntityName> = EntityName.fetchRequest() as! NSFetchRequest<EntityName>
        request.sortDescriptors = [NSSortDescriptor(key: "name", ascending: true)]
        return request
   }
}


struct MasterView: View {

    @Environment(\.managedObjectContext) var managedObjectContext
    @FetchRequest(fetchRequest: EntityName.allEntityNameFetchRequest()) var allEntityNames: FetchedResults<EntityName>


    var body: some View {
        NavigationView {
            List {
                ForEach(self.allEntityNames) …