tabbar controller 怎样增加一个选项?该怎么处理

tabbar controller 怎样增加一个选项?
默认只有两个选项可以点击

------解决方案--------------------
如果是IB设置的话,可以设置其属性viewControls(名字忘了)
Xcode的或tabBarController.viewControllers=controls;
controls为视图控制器数组

------解决方案--------------------
C/C++ code
NSMutableArray* tabControllers = [[NSMutableArray alloc] initWithObjects:
                                          [viewControllers1 objectAtIndex:0],
                                          [viewControllers2 objectAtIndex:1],
                                          [viewControllers3 objectAtIndex:2],
                                          [viewControllers4 objectAtIndex:3],nil];
        [tabBarController setViewControllers:tabControllers];
        [tabControllers release];