forked from shadowfacts/Tusker
Don't parent background managed object contexts to view context
Otherwise, certain operations require the background contexts to interact with the view context, which can block the main thread from accessing the view context (potentially causing hitches if the view context access is in a critical path, like cell fetching).
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@ -20,13 +20,15 @@ class MastodonCachePersistentStore: NSPersistentContainer {
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private(set) lazy var backgroundContext: NSManagedObjectContext = {
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let context = NSManagedObjectContext(concurrencyType: .privateQueueConcurrencyType)
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context.parent = self.viewContext
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context.persistentStoreCoordinator = self.persistentStoreCoordinator
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context.automaticallyMergesChangesFromParent = true
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return context
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}()
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private(set) lazy var prefetchBackgroundContext: NSManagedObjectContext = {
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let context = NSManagedObjectContext(concurrencyType: .privateQueueConcurrencyType)
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context.parent = self.viewContext
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context.persistentStoreCoordinator = self.persistentStoreCoordinator
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context.automaticallyMergesChangesFromParent = true
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return context
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}()
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@ -51,6 +53,8 @@ class MastodonCachePersistentStore: NSPersistentContainer {
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}
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}
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viewContext.automaticallyMergesChangesFromParent = true
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NotificationCenter.default.addObserver(self, selector: #selector(managedObjectsDidChange), name: .NSManagedObjectContextObjectsDidChange, object: viewContext)
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}
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