Progress indicator for webView

I have a UITabBar application that has two different web views. However, they show a blank white screen until the site loads. (Which sometime can be for a little while if run on EDGE) How would it be possible to set up a progress indicator for the webview without having to complete redo my IB files? (I know that UIProgressIndicator is it's own view, and I'm not sure how to somehow connect it back to webViews.)