Enums

Error is an enum representing all recoverable errors. It is associated with the Realm error domain specified in RLMErrorDomain.

let realm: Realm? do { realm = Realm() } catch RealmSwift.Error.IncompatibleLockFile() { print(Realm Browser app may be attached to Realm on device?) }

A notification indicating that changes were made to a Realm.

A RealmCollectionChange value encapsulates information about changes to collections that are reported by Realm notifications.

The change information is available in two formats: a simple array of row indices in the collection for each type of change, and an array of index paths in a requested section suitable for passing directly to UITableView’s batch update methods.

The arrays of indices in the .Update case follow UITableView’s batching conventions, and can be passed as-is to a table view’s batch update functions after being converted to index paths. For example, for a simple one-section table view, you can do the following:

self.notificationToken = results.addNotificationBlock { changes switch changes { case .Initial: // Results are now populated and can be accessed without blocking the UI self.tableView.reloadData() break case .Update(_, let deletions, let insertions, let modifications): // Query results have changed, so apply them to the TableView self.tableView.beginUpdates() self.tableView.insertRowsAtIndexPaths(insertions.map { NSIndexPath(forRow: $0, inSection: 0) }, withRowAnimation: .Automatic) self.tableView.deleteRowsAtIndexPaths(deletions.map { NSIndexPath(forRow: $0, inSection: 0) }, withRowAnimation: .Automatic) self.tableView.reloadRowsAtIndexPaths(modifications.map { NSIndexPath(forRow: $0, inSection: 0) }, withRowAnimation: .Automatic) self.tableView.endUpdates() break case .Error(let err): // An error occurred while opening the Realm file on the background worker thread fatalError(\(err)) break } }