iOS - 如何刷新/更新Core Data瞬态属性？

myManagedObject.lastAccessedDate = Date()

do {
    try managedObjectContext.save()
} catch {
    print("Error saving context: \(error)")
}

NotificationCenter.default.addObserver(self, selector: #selector(contextDidSave(_:)), name: NSNotification.Name.NSManagedObjectContextDidSave, object: managedObjectContext)

@objc func contextDidSave(_ notification: Notification) {
    guard let context = notification.object as? NSManagedObjectContext else { return }
    
    if context !== managedObjectContext {
        managedObjectContext.performAndWait {
            do {
                try managedObjectContext.mergeChanges(fromContextDidSave: notification)
            } catch {
                print("Error merging changes: \(error)")
            }
        }
    }
}