Popover加title

 just make its contentViewController to be a UINagivationController, and set the title of its root view controller

VersionInfoController *versionInfo = [[VersionInfoController alloc] initWithNibName:@"VersionInfoController" bundle:nil];
    versionInfo.title = @"About";
    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:versionInfo];
    [versionInfo release];
    UIPopoverController *tempVersionInfoPopover = [[UIPopoverController alloc] initWithContentViewController:navController];