UIWebView Expose Objective C to JavaScript

Question

How would I expose an Objective-C method within JavaScript when using the iPhone SDK when using the UIWebView?

Any help would be appreciated!

Answer 1

The best way to do this would be through a custom link, and then use the UIWebView delegate method -webView:shouldStartLoadWithRequest:navigationType: to trap requests. When you see a request come through with your link in it, you know your action has been triggered.

Answer 2

There is an example application in the QuickConnectiPhone framework that shows you how to do this.

QuickConnectiPhone also gives you a JavaScript function called 'makeCall'. You pass it a command and an array of parameters and it will pass them to the Objective-C side of your app for handling. You can then make your function call.

You can find it here on Sourceforge.

Answer 3

To see an example of this check out the PhoneGap source code from Github:

http://github.com/sintaxi/phonegap/tree/master/iphone/Classes/GlassAppDelegate.m