gistfile1.rb

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    @window = UIWindow.alloc.initWithFrame(UIScreen.mainScreen.bounds)
    @window.makeKeyAndVisible
    @window.rootViewController = RootController.new
    @window.rootViewController.wantsFullScreenLayout = true
    true
  end
end

class RootController < UIViewController
  def javaScript
    "alert('Rubymotion');"
  end

  def viewDidLoad
    super

    view.backgroundColor = UIColor.whiteColor
    @my_web_view = UIWebView.alloc.initWithFrame(view.bounds)
    @my_web_view.delegate = self
    @my_web_view.scalesPageToFit = 'YES'

    view.addSubview(@my_web_view)

    url = NSURL.URLWithString("http://www.rubymotion.com")
    request = NSURLRequest.requestWithURL(url)

    @my_web_view.loadRequest(request)
  end

  def webViewDidStartLoad(webView)
    UIApplication.sharedApplication.setNetworkActivityIndicatorVisible('YES')
  end

  def webViewDidFinishLoad(webView)
    UIApplication.sharedApplication.setNetworkActivityIndicatorVisible('NO')
    webView.stringByEvaluatingJavaScriptFromString(javaScript)
  end

  def webView(webView, didFailLoadWithError:error)
    UIApplication.sharedApplication.setNetworkActivityIndicatorVisible('NO')
  end
end