LiveQuery

public class LiveQuery

A LiveQuery automatically observes database changes and re-run the query that the LiveQuery object is created from. If there is a new query result or an error occurred, the LiveQuery object will report the changed result via the added listener blocks.

  • Starts observing database changes and reports changes in the query result.

    Declaration

    Swift

    public func run()

  • Stops observing database changes.

    Declaration

    Swift

    public func stop()

  • Adds a query result change listener block. @param block a change listener block @return the opaque listener object used for removing the added change listener block.

    Declaration

    Swift

    public func addChangeListener(_ block: @escaping (LiveQueryChange) -> Void) -> NSObjectProtocol

  • Removed a change listener. @param listener a listener object received when adding the change listener block.

    Declaration

    Swift

    public func removeChangeListener(_ listener: NSObjectProtocol)