CSListObserver

@available(OSX 10.12, *)
@objc
public protocol CSListObserver : AnyObject

Implement the CSListObserver protocol to observe changes to a list of NSManagedObjects. CSListObservers may register themselves to a CSListMonitor‘s -addListObserver: method:

CSListMonitor *monitor = [CSCoreStore 
    monitorListFrom:[CSFrom entityClass:[MyPersonEntity class]]
    fetchClauses:@[[CSOrderBy sortDescriptor:[CSSortKey withKeyPath:@"lastName" ascending:YES]]]];
[monitor addListObserver:self];

See also

ListObserver

  • Handles processing just before a change to the observed list occurs

    Declaration

    Swift

    @objc
optional func listMonitorWillChange(_ monitor: CSListMonitor)

    Parameters

    monitor

    the CSListMonitor monitoring the list being observed

  • Handles processing right after a change to the observed list occurs

    Declaration

    Swift

    @objc
optional func listMonitorDidChange(_ monitor: CSListMonitor)

    Parameters

    monitor

    the CSListMonitor monitoring the object being observed

  • This method is broadcast from within the CSListMonitor‘s -refetchWithFetchClauses: method to let observers prepare for the internal NSFetchedResultsController’s pending change to its predicate, sort descriptors, etc. Note that the actual refetch will happen after the NSFetchedResultsController’s last -controllerDidChangeContent: notification completes.

    Declaration

    Swift

    @objc
optional func listMonitorWillRefetch(_ monitor: CSListMonitor)

    Parameters

    monitor

    the CSListMonitor monitoring the object being observed

  • After the CSListMonitor‘s -refetchWithFetchClauses: method is called, this method is broadcast after the NSFetchedResultsController’s last -controllerDidChangeContent: notification completes.

    Declaration

    Swift

    @objc
optional func listMonitorDidRefetch(_ monitor: CSListMonitor)

    Parameters

    monitor

    the CSListMonitor monitoring the object being observed