iphone: View on top of UIWebView?

iphone: View on top of UIWebView?
I'm working on a browser app, and I have an address bar on top the UIWebView. On MobileSafari if you scroll down, the address bar starts to move to the top, out of the screen, and the UIWebView doesn't scroll. Only when the address bar disappears completely, it starts to scroll. I would like to have this effect in my app as well.

What's the best way to implement this?

Thanks


I'm the maker of Mammoth Internet Browser ;-)

The only way to implement this requires iOS 5. In iOS 5, UIWebView has an UIScrollView subview.

And use the following code:

Set a area for the address bar:

[[myWebView scrollView] setContentInset:UIEdgeInsetsMake(64, 0, 0, 0)];

Move the address bar using the scrollview delegate:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView{

        if(scrollView.contentOffset.y>=-64&&scrollView.contentOffset.y<30)
        {
            topBar.frame=CGRectMake(0,-44-scrollView.contentOffset.y, 320, 44);

        }
        else if(scrollView.contentOffset.y<-64)
            topBar.frame=CGRectMake(0,20, 320, 44);//Lock the position
}