我想向FetchRequest添加 predicate ...

如果我将其放入FetchRequest中，它将不起作用：

not working

@SectionedFetchRequest(sectionIdentifier: \Product.manufacturer?.name, 
                       sortDescriptors: [NSSortDescriptor(keyPath: \Product.name, ascending: true)], 
                       predicate: NSPredicate(format: "trashed = true")) // <-- not working

var products: SectionedFetchResults<String?, Product>

但当我使用.onChange将其添加到FetchedResults时，它正在工作

working

@SectionedFetchRequest(sectionIdentifier: \Product.manufacturer?.name, 
                       sortDescriptors: [NSSortDescriptor(keyPath: \Product.name, ascending: true)], 
                      // -- no predicate in FetchRequest --)

var products: SectionedFetchResults<String?, Product>

var body: some View {
    List {
        ForEach(products) { product in
            Text(product.name)
        }
        Button {
            testPred.toggle()
        } label: {
            Text("activate predicate")
        }
    }
}
.onChange(of: isSortedAscending) { _ in
    products.nsPredicate = NSPredicate(format: "trashed = true") // <-- working
}

edit 1
我现在唯一的想法是问这是否可能与这些设置有关？

publicDescription.cloudKitContainerOptions = options
publicDescription.setOption(true as NSNumber, forKey: NSPersistentHistoryTrackingKey)
publicDescription.setOption(true as NSNumber, forKey: NSPersistentStoreRemoteChangeNotificationPostOptionKey)