App Groups for iOS and tvOS not working in AppleTV device but works in AppleTV simulator

Question

ManuelMB OP

Created May ’17

Replies 1

Boosts 0

Views 2.0k

Participants 1

I am developing an app that use CoreData with targets for iO and tvOS.

I also want to use CoreData with some widgets / extensions.

I create an App Groups to share CoreData between App and extensions for iOS and for tvOS:

group.com.dummy.AppName

I used the same name for the App Gropus for both iOS and tvOS.

I subclass NSPersistentContainer to use as defaultDirectoryURL() the App Group as follow:

   class PersistentContainerForAppGroups : NSPersistentContainer {
        override class func defaultDirectoryURL() -> URL {
         guard let url = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.com.dummy.AppName") else { fatalError("Can not get url forSecurityApplicationGroupIdentifier")}
         return url
        }
    }

Then I set the persistentContainer as follows:

    lazy var persistentContainer: PersistentContainerForAppGroups = {
        let container = PersistentContainerForAppGroups(name: "AppName")

        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })
        return container
    }()

The app works ok in iOS device, iOS simulator, appleTV simulator but not in appleTV device.

I get this error when try to run the app in appleTV device:

error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///private/var/mobile/Containers/Shared/AppGroup/94BF2E01-FE91-4D6F-971B-3915B212B71B/AppName.sqlite options:{

NSInferMappingModelAutomaticallyOption = 1;

NSMigratePersistentStoresAutomaticallyOption = 1;

} ... returned error Error Domain=NSCocoaErrorDomain Code=512 "The file couldn’t be saved." UserInfo={reason=Failed to create file; code = 1} with userInfo dictionary {

reason = "Failed to create file; code = 1”;

}

What is wrong with the above code?

Boost

Answer 1

ManuelMB OP

May ’17

Accepted Answer

I reply to myself, I found a solution:

tvOS app needs to use Caches directory.

class PersistentContainerForAppGroups : NSPersistentContainer {
    override class func defaultDirectoryURL() -> URL {
        guard let url = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.com.dummy.AppName") else { fatalError("Can not get url forSecurityApplicationGroupIdentifier")}
        var finalURL = url.absoluteURL
      
        #if os(tvOS)
            finalURL = url.appendingPathComponent("Library/Caches")
        #endif
      
        return finalURL
    }
}

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