Refresh a tab in xcode?

Is there a way to refresh a tab's content in XCode? I'm s开发者_如何学运维etting a tab as follows: [[dappDelegate tabBarController] setSelectedIndex:1];

However, when I try and do it from a different screen, the same tab screen is still selected. Is there a way to have the tab completely reload the data?

Thanks, Graeme.

I use a hack around that seems to work for my case:

if(tabBarController.selectedIndex == 1)
{
[tabBarController setSelectedIndex:-1];
[tabBarController setSelectedIndex:1];
}
else
{
[tabBarController setSelectedIndex:1];
}