How to calculate the size of HTML text to be drawn

Create NSURLRequest and load it into view. The view takes care of rendering the html automatically. Note that the url can be local, on a website, on a server, like php, whatever. I don't understand the second question. Please redefine this. Thanks.

// Request the contents of the abtWebView
NSURLRequest * request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.whatever.com/aDirectory/stuff.html"]];

// Load the webview
[self.theWebView loadRequest:request];