I have a native iPhone app, which has a UIWebView component to it. I am trying to see if I can replicate the \"Add to Home Screen\" button that
The short answer is no, you can't. Apple does not let you.
Here's a similar question which may help you come up with other possibilities: Javascript for "Add to Home Screen" on iPhone?
If I had to think of a work around off the top of my head, you could create an javascript pop-up which instructs them how to. It could say something like tap this button to go to mobile safari then tap action -> add to home screen.
Execute the Javascript with UIWebView's method:
- (NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)script
Hope this helps.