navigationItemDidUpdate()

Declaration

func navigationItemDidUpdate()

Discussion

The system calls navigationItemDidUpdate() every time UIDocumentViewController makes changes to the navigation item. Customize the navigation items in this method.

This example adds buttons to the navigation bar and customizes the toolbar:

class EditorViewController:
        UIDocumentViewController,
        UINavigationItemRenameDelegate {

    override func navigationItemDidUpdate() {
        navigationItem.customizationIdentifier = "editorViewCustomization"
        configureCenterItemGroups()
        navigationItem.rightBarButtonItem = splitView.previewVisibilityBarButton
    }

}