核心数据数据删除

Question

在某个应用程序上工作，该应用程序在任何用户登录时都应删除一些Core数据存储的情况-应该从数据库中删除以前的用户。结合使用删除实体；

func deleteEntity(_ entity : String) {
        let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: entity)
        fetchRequest.includesPropertyValues = false
        do {
            let results = try self.context.fetch(fetchRequest)
            for managedObject in results {
                let managedObjectData : NSManagedObject = managedObject as! NSManagedObject
                self.context.delete(managedObjectData)
            }
            try self.context.save()
        } catch let error {
            print(error)
        }
    }

...然后删除如下的sqlite文件。从用户那里获取报告，表明以前的用户保留在内存中，直到重新启动电话（！）。即使文件已删除，数据是否仍保留在内存中？代码有问题吗？

fileprivate func deleteStore(_ storeName: String) {
        self.context.performAndWait { [weak self] () -> Void in

            guard let stores = self?.context.persistentStoreCoordinator?.persistentStores else {return }
            guard let appDelegate = self?.appDelegate else {return }

            for store in stores {
                if storeName == store.sqliteStoreName {
                    do {
                       // try self?.context.persistentStoreCoordinator?.remove(store)
                         try self?.context.persistentStoreCoordinator?.destroyPersistentStore(at: store.url!, ofType: NSSQLiteStoreType, options: nil)
                        try FileManager.default.removeItem(at: store.url!)
                        try FileManager.default.removeItem(at: store.walFileURL as URL)
                        try FileManager.default.removeItem(at: store.shmFileURL as URL)


                        if appDelegate.shouldUseInMemoryStores {
                            try self?.context.persistentStoreCoordinator?.addPersistentStore(ofType: NSInMemoryStoreType, configurationName: nil, at: store.url!, options: nil)
                        } else {
                            try self?.context.persistentStoreCoordinator?.addPersistentStore(ofType: NSSQLiteStoreType, configurationName: nil, at: store.url!, options: appDelegate.coreDataStoreOptions)
                        }
                    } catch let error as NSError {
                        DDLogError("caught error: \(error)")
                    }
                }
            }
        }