ListSectionObserver

@available(OSX 10.12, *)
public protocol ListSectionObserver : ListObjectObserver

Implement the ListSectionObserver protocol to observe changes to a list’s section info. ListSectionObservers may register themselves to a ListMonitor‘s addObserver(_:) method:

let monitor = CoreStore.monitorSectionedList(
    From<MyPersonEntity>(),
    SectionBy("age") { "Age \($0)" },
    OrderBy(.ascending("lastName"))
)
monitor.addObserver(self)
  • Notifies that a section was inserted at the specified index. (Optional) The default implementation does nothing.

    Default Implementation

    Declaration

    Swift

    func listMonitor(_ monitor: ListMonitor<ListEntityType>, didInsertSection sectionInfo: NSFetchedResultsSectionInfo, toSectionIndex sectionIndex: Int)

    Parameters

    monitor

    the ListMonitor monitoring the list being observed

    sectionInfo

    the NSFetchedResultsSectionInfo for the inserted section

    sectionIndex

    the new section index for the new section

  • Notifies that a section was inserted at the specified index. (Optional) The default implementation does nothing.

    Default Implementation

    Declaration

    Swift

    func listMonitor(_ monitor: ListMonitor<ListEntityType>, didDeleteSection sectionInfo: NSFetchedResultsSectionInfo, fromSectionIndex sectionIndex: Int)

    Parameters

    monitor

    the ListMonitor monitoring the list being observed

    sectionInfo

    the NSFetchedResultsSectionInfo for the deleted section

    sectionIndex

    the previous section index for the deleted section