我想使用核心数据NSManagedObject作为观察对象，以供用户编辑。问题在于，重新调用基础swiftui视图会导致托管对象上下文中的托管对象重复，因为其重复初始化。解决该问题的最优雅方法是什么？ （为了便于以后编辑保存的对象，我想使用这种观察到的管理对象方法）

struct ContentView: View {

@FetchRequest(entity: ProtocolParent.entity(),sortDescriptors: []) var savedProtocols: FetchedResults<ProtocolParent>

@State var showAddView = false

var body: some View {
    VStack {
        Button(action: {
            self.showAddView.toggle()
        }) {
            Text("Add Protocol")
        }
        List {
            ForEach(savedProtocols,id: \.self) { element in
                Text(element.name)
            }
        }
        .sheet(isPresented: $showAddView) {
            AddProtocolParentView()
        }
    }
}
}

struct AddProtocolParentView: View {

@ObservedObject var vm = AddProtocolParentViewModel()

var body: some View {
    VStack {
        TextField("AddName",text: $vm.protocolParent.name)
        
        Button(action: {
            self.vm.save()
        }) {
            Text("Save")
        }
    }
}
}

class AddProtocolParentViewModel: ObservableObject {

var moc: NSmanagedobjectcontext

@Published var protocolParent: ProtocolParent

init() {
    moc = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
    protocolParent = ProtocolParent(context: moc)
    protocolParent.name = ""
}

func save() {
    do {
        try moc.save()
        print("Saved!")
    } catch {
        print(error.localizedDescription)
    }
}
}

CoreData类（名称设置为非可选）：

extension ProtocolParent {

@nonobjc public class func fetchRequest() -> NSFetchRequest<ProtocolParent> {
    return NSFetchRequest<ProtocolParent>(entityName: "ProtocolParent")
}

@NSManaged public var name: String

}