如何在SwiftUI上启用核心数据加密

Question

当我们处理包含委托的UIKit项目时，我们只需要添加以下代码

do {
// Define Options
let options: [AnyHashable: Any] = [
NSPersistentStoreFileProtectionKey: FileProtectionType.complete
]
// Add Persistent Store
try persistentStoreCoordinator.addPersistentStore(ofType: NSSQLiteStoreType,
configurationName: nil,
at: persistentStoreURL,
options: options)
} catch {
// Error Handling
...
}

为核心数据启用加密。

但是如何做到这一点，当你有一个SwiftUI应用程序时，WITH a DELEGATE它只包含一个名为Persistense.swift的文件，其中包含以下内容：

import CoreData
struct PersistenceController {
static let shared = PersistenceController()
static var preview: PersistenceController = {
let result = PersistenceController(inMemory: true)
let viewContext = result.container.viewContext
return result
}()
let container: NSPersistentContainer
init(inMemory: Bool = false) {
container = NSPersistentContainer(name: "TharmaTrack")
if inMemory {
container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null")
}
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
/*
Typical reasons for an error here include:
* The parent directory does not exist, cannot be created, or disallows writing.
* The persistent store is not accessible, due to permissions or data protection when the device is locked.
* The device is out of space.
* The store could not be migrated to the current model version.
Check the error message to determine what the actual problem was.
*/
fatalError("Unresolved error (error), (error.userInfo)")
}
})
}
}

Answer 1

NSPersistentContainer有一个persistentStoreDescriptions数组，您可以在调用container.loadPersistentStores之前对其进行修改。事实上，如果inMemory为true，那么您已经执行了更改商店URL的操作。

因此，要设置文件保护选项：

container = NSPersistentContainer(name: "TharmaTrack")
container.persistentStoreDescriptions.first!.setOption(FileProtectionType.complete as NSObject,
forKey: NSPersistentStoreFileProtectionKey)