How to call Objective-C from Javascript?

Question

I have a WebView, and I want to call a view in Objective-C from JavaScript. Does someone know how I can do this?

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I have this code in my ViewController:

Answer 1

The window.location method of calling objective c from JS isn't recommended. One example of problems: if you make two immediate consecutive calls one is ignored (since you can't change location too quickly) - try it yourself..

I recommend the following alternative approach:

function execute(url) 
{
  var iframe = document.createElement("IFRAME");
  iframe.setAttribute("src", url);
  document.documentElement.appendChild(iframe);
  iframe.parentNode.removeChild(iframe);
  iframe = null;
}

You call the execute function repeatedly and since each call executes in its own iframe, they should not be ignored when called quickly.

Credits to this guy.