How to load multiple web pages in the background of an iPhone/Android app?

We would like to load web pages in the background of an iPhone app.

Use case:

1) User opens iPhone app and sees a "loading" icon on the home screen. In the background, the app loads up five web pages.

2) When all five web pages are loaded, the app is notifi开发者_运维技巧ed and switches the view from the home screen to one of the web pages.

How can this be done?

How can this be done for an Android app?

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For iPhone, create five UIWebView instances off-screen & load the URLs you need. When the delegate method webviewDidFinishLoad: hits five times, you are done.

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for iPhone You can create a View Controller that contains 5 UIWebView View components and the loading icon view. Set the delegate of each UIWebView to the controller add the loading icon to the controllers view.

In the "- (void)webViewDidFinishLoad:(UIWebView *)loadedWebView;" delegate method keep track of which webView has finished loading the HTML content and once all 5 webviews have finished loading their content, remove the loading icon and add one of the web views at a subview to the controllers view.