问题
I'm rewriting the goBack function with my own because I need to be able to change the URL depending on whether the orientation changed or not. How can I access the URL history and figure out the previous one?
回答1:
You need to implement the UIWebViewDelegate. It has methods that will allow you to control the back functionality as well as letting you capture the URL when you navigate to it.
来源：https://stackoverflow.com/questions/7958601/ios-uiwebview-how-can-i-figure-out-what-the-previous-url-is