iOS segmentedController

 NSArray *array = [NSArray arrayWithObjects:@"鸡翅",@"排骨", nil];
    UISegmentedControl *segmentedController = [[UISegmentedControl alloc] initWithItems:array];
    segmentedController.segmentedControlStyle = UISegmentedControlSegmentCenter;


    [segmentedController addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];

    self.navigationItem.titleView = segmentedController;

执行的方法：

-(void)segmentAction:(id)sender
{
    switch ([sender selectedSegmentIndex]) {
        case 0:
        {
            UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了鸡翅" delegate:self  cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
            [alter show];


        }
        break;
    case 1:
        {
            UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了排骨" delegate:self  cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
            [alter show];
        }
        break;
        
        default:
            break;
    }
}