Communication between iOS's native app and webpage's javascript

Question

I have a webpage loaded in a UIWebView, and a javascript function of the page needs to data from native iOs app, a NSString. How can a Js function access the data in native app

Answer 1

Let the javascript load a custom URL, which your app intercepts. It than can parse it, prepare the data and pass it on to your webpage via stringByEvaluatingJavaScriptFromString:.