title: UIWebView reuse
body: <p>I want to use UIWebview in different view controllers,but i don't want these view controller to reload the web page, in another way, I want a UIWebview to load the page once,and used it anywhere.
  SO I want to create a web view and load the webpage in a singleton way. 
  My question is : is this possible or appropriate?
  Thanks a lot.</p>