UISearchController

This app uses the new UISearchController API to manage the display of search results.

There one class: ViewController.swift, and its extension file, ViewControllerExtensions.swift.

ViewController.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()
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.

ViewControllerExtensions.swift

The important protocol included the extensions file is extension ViewController: UISearchResultsUpdating.

When this delegate method is called:

• searchArray is cleared
• a search of countryArray is performed based on searchController.searchBar.text
• any matches are added to searchArray
• countryTable is reloaded

In cellForRowAtIndexPath, the countryTable is populated based on whether or not the searchController is active.

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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.

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####23rd Feb 2015

• Updated to support Swift 1.2 beta 1 (requires Xcode 6.3 beta 1).
• Larger selection of countries to search.
• Housekeeping.

####27th March 2015

• Updated to support Swift 1.2 beta 3 (requires Xcode 6.3 beta 3).
• Switched to didSet syntax when updating the searchResults tableview:

var searchArray:[String] = [String](){ didSet {countryTable.reloadData()} }

####16th April 2015

• Swift 1.2 support.

####17th Jan 2016

• Swift 2.1 support.