Swift NSBatchUpdateRequest

batchupdate.swift

            let batchRequest = NSBatchUpdateRequest(entityName: "Group")
            batchRequest.predicate = NSPredicate(format: "SELF != %@", self.group!)
            batchRequest.propertiesToUpdate = ["isFirstView":NSNumber(bool: false)]
            batchRequest.resultType = .UpdatedObjectsCountResultType
            do {
                let results:NSBatchUpdateResult = try managedContext.executeRequest(batchRequest) as! NSBatchUpdateResult

                print("update with result = \(results.result)")
            } catch {
                print("Error something..")
            }