http://www.cnblogs.com/aipingguodeli/archive/2012/04/12/2443687.html

//判断选中的某个分段switch ([(UISegmentedControl *)self.navigationItem.titleView selectedSegmentIndex]) 	{		case 0:						break;		case 1:						break;		case 2:						break;		case 3:					default:			break;	}