How enable canGoBack/canGoForward while using UIWebView with anchor(#)?

(Edited) I'm using UIWebView and I'm expeting shouldStartLoadRequest: - didStart.. - didFinish.. delegate method routine. But开发者_如何转开发 after shouldStartLoadRequest: (that is working right), my webview didn't jump into didStart/didFinish. My url request is .do (I searched, that would be reference URL with Ajax) The problem is, I can't toggle goBack/goForward buttons with UIWebView delegate. I often implement in didStart/didFinish with networkIndicator, but at this time, I can't.

How do I implement to toggle goBack/goForward enabled?

(Of course, I set the delegate so request)