首先在AppDelegate里寫入

#pragma mark - Methods
- (void)setupViewControllers {
UIViewController *firstViewController = [[SupermarketViewController alloc] init];
UIViewController *firstNavigationController = [[UINavigationController alloc]
initWithRootViewController:firstViewController];

//實(shí)例化三個ViewController

OrderViewController *firstVC = [[OrderViewController alloc] init];
twoViewController *secondVC =[[twoViewController alloc] init];
threeViewController *thirdVC = [[threeViewController alloc] init];
JRSegmentViewController *vc = [[JRSegmentViewController alloc] init];

//顯示三個按鈕

[vc setTitles:@[@"全部", @"待收貨", @"待評價"]];
//設(shè)置segmentBg的顏色
vc.segmentBgColor = [UIColor orangeColor];
vc.indicatorViewColor = [UIColor whiteColor];
[vc setViewControllers:@[firstVC, secondVC, thirdVC]];
UIViewController *secondViewController = vc;
UIViewController *secondNavigationController = [[UINavigationController alloc]
initWithRootViewController:secondViewController];
UIViewController *thirdViewController = [[MineViewController alloc] init];
UIViewController *thirdNavigationController = [[UINavigationController alloc]
initWithRootViewController:thirdViewController];
RDVTabBarController *tabBarController = [[RDVTabBarController alloc] init];
[tabBarController setViewControllers:@[firstNavigationController, secondNavigationController,
thirdNavigationController]];
self.viewController = tabBarController;
[self customizeTabBarForController:tabBarController];
}

之后引入一個第三方JRSegmentViewController