Reload View only when application is opened Again

My application has tab bar with one of the tabs having a segmented control on navigation bar. Based on segment clicked different view is displayed using a url. I am calling the url in viewdidload method.I do not want to use viewwillAppear to call the url as it will be called each time the view is displayed. I only want to call the url again whenever user closes the application and comes back.

Whats the best way to do this.Sho开发者_StackOverflow社区uld I remove the view controller from and reload it again once the application is opened.

Please use a more descriptive title for your question next time!

There are notifications for this that you can observe in your application:

UIApplicationDidBecomeActiveNotification and UIApplicationWillEnterForegroundNotification come to mind.