Swift: UISearchBar: Get text when search button clicked

Simple (non-specific) answer for those arriving here via search:

If your outlet name for your UISearchBar is 'searchBar'...

@IBOutlet weak var searchBar: UISearchBar!

Then the text entered by the user in UISearchBar is called...

searchBar.text

Two common things Swift coders forget: 1. Make sure to add UISearchBarDelegate class...

ViewController: UIViewController, UISearchBarDelegate

2. Don't forget to identify your view class as the delegate... Inside viewDidLoad you could write...

   searchBar.delegate = self
   

If you forget #1 above you won't be able to auto-complete the methods you'll need to implement like...

func searchBarSearchButtonClicked(_ seachBar: UISearchBar) { your code }

... which is given to you by the delegate protocol.

In viewDidLoad you must set the delegate of the search bar to be receiving searchBarSearchButtonClicked from it:

import UIKit

class SecondViewController: UIViewController, UISearchBarDelegate
{
    @IBOutlet var myWebView : UIWebView
    @IBOutlet var adressbar: UISearchBar

    override func viewDidLoad()
    {
        super.viewDidLoad()

        adressbar.showsScopeBar = true
        adressbar.delegate = self

        var url = NSURL(string: "http://google.com")
        var request = NSURLRequest(URL: url)

        myWebView.scalesPageToFit = true
        myWebView.loadRequest(request)
    }

    func searchBarSearchButtonClicked( searchBar: UISearchBar!)
    {
        var url = NSURL(string: searchBar.text)
        var request = NSURLRequest(URL: url)

        myWebView.scalesPageToFit = true
        myWebView.loadRequest(request)
    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()
    }
}