How can I make subviews of UIWebView with its web content?

I added a button on UIWebView, but the button is stayed at the position while HTML content is scrolling. I want to make it scroll with HTML开发者_JAVA百科. How can I do this?

Just wait for iOS 5.0, UIWebView will have a UIScrollView subview so you can get the page offset and move the button in the ScollView Delegate methods.