UIWebVIewをrefreshControlでリロードする(swift)

webView.scrollViewにrefreshControlをaddSubviewするだけ。

class MyViewController: UIViewController, UIWebViewDelegate {

    @IBOutlet weak var webView: UIWebView!

    var refreshControl:UIRefreshControl!

    override func viewDidLoad() {
        super.viewDidLoad()

        addRefreshControl()
    }

    func pullToRefresh() {
        self.refreshControl.endRefreshing()
        self.webView.reload()
    }

    func addRefreshControl() {
        refreshControl = UIRefreshControl()
        refreshControl.attributedTitle = NSAttributedString(string: "読込み中...")
        refreshControl.addTarget(self, action: "pullToRefresh", forControlEvents:.ValueChanged)
        self.webView.scrollView.addSubview(refreshControl)
    }
}