This app uses the new UISearchController API to manage the display of search results.
There are two main classes: ViewController.swift and ViewControllerExtensions.swift.
This class sets up a sample Array of different countries (countryArray), an Array for holding search results (searchArray), and finally a UISearchController for which manages the searching (countrySearchController).
The countrySearchController is setup in viewDidLoad as follows:
let controller = UISearchController(searchResultsController: nil)
nil is passed as the argument in the method parameter as it has the effect of presenting the search results in the current view.
controller.searchResultsUpdater = self
The ViewController is responsible for updating the contents of search controller. This means that the ViewController must conform to the new UISearchResultsUpdating protocol.
controller.searchBar.sizeToFit()
self.countryTable.tableHeaderView = controller.searchBar
Finally, you need to set the frame of the searchBar (otherwise it has a height of 0).
There is no need to add a search bar in Interface Builder.
The important protocol included the extensions file is extension ViewController: UISearchResultsUpdating.
When this delegate method is called:
searchArrayis cleared- a search of
countryArrayis performed based onsearchController.searchBar.text - any matches are added to
searchArray self.countryTableis reloaded
In cellForRowAtIndexPath, the countryTable is populated based on whether or not the searchController is active.
An alternate setup is included that allows you to use a separate view controller to present search results:
A standalone tableViewController is created in Storyboard and then instantiated as part of the UISearchController setup.
let alternateController:AlternateTableViewController = storyBoard.instantiateViewControllerWithIdentifier("aTV") as! AlternateTableViewController
let controller = UISearchController(searchResultsController: alternateController)
AlternateTableViewController conforms to UISearchResultsUpdating and is responsible for displaying search results from the original view controller's search results array.
####23rd Feb 2015
- Updated to support Swift 1.2 beta 1 (requires Xcode 6.3 beta 1).
- Larger selection of countries to search.
- Housekeeping.