I just added App Groups to my app using this StackOverFlow post. Unfortunately since the defaultDirectoryURL is changing, I can not fetch any of the old data I made before using the App Groups directory. I know the data is still there because when I switch back to using a regular NSPersistentContainer instead of the GroupedPersistentContainer, I can get the data.
How can I migrate my old data over to where I'm fetching the app group's data?
Core Data code:
class CoreDataManager {
static let sharedManager = CoreDataManager()
private init() {}
lazy var persistentContainer: NSPersistentContainer = {
var useCloudSync = UserDefaults.standard.bool(forKey: "useCloudSync")
let containerToUse: NSPersistentContainer?
if useCloudSync {
containerToUse = NSPersistentCloudKitContainer(name: "App")
} else {
containerToUse = GroupedPersistentContainer(name: "App")
let description = containerToUse!.persistentStoreDescriptions.first
description?.setOption(true as NSNumber, forKey: NSPersistentHistoryTrackingKey)
}
guard let container = containerToUse, let description = container.persistentStoreDescriptions.first else {
fatalError("Hey Listen! ###\(#function): Failed to retrieve a persistent store description.")
}
description.setOption(true as NSNumber, forKey: NSPersistentStoreRemoteChangeNotificationPostOptionKey)
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
...
return container
}
}
GroupedPersistentContainer code:
class GroupedPersistentContainer: NSPersistentContainer {
enum URLStrings: String {
case group = "group.App"
}
override class func defaultDirectoryURL() -> URL {
let url = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: URLStrings.group.rawValue)
if !FileManager.default.fileExists(atPath: url!.path) {
try? FileManager.default.createDirectory(at: url!, withIntermediateDirectories: true, attributes: nil)
}
return url!
}
}
I haven't done this yet for my NSPersistentCloudKitContainer yet but it will follow the same format as this one.