app.m

#import "AppDelegate.h"
#import "TmailViewController.h"
#import "TaoBaoViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    
 
// Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    //淘寶頁面
    TaoBaoViewController *taobao =[[TaoBaoViewController alloc] init];
    
    UINavigationController *taoNav=[[UINavigationController alloc] initWithRootViewController:taobao];
    
    
    
 
//設定標題
    taoNav.tabBarItem.title=@"淘寶";
    //設定未選中的圖片
    taoNav.tabBarItem.image=[UIImage imageNamed:@"taobao"];
    
    //設定選中時的圖片
    taoNav.tabBarItem.selectedImage=[UIImage imageNamed:@"taobao"];
    
    
    
    //天貓頁面
    TmailViewController *tmall =[[TmailViewController alloc] init];
    
    UINavigationController 
 
*tmallNav=[[UINavigationController alloc]initWithRootViewController:tmall];
    
    
    
    //設定標題
    tmallNav.tabBarItem.title=@"天貓";
    //設定未選中的圖片
    tmallNav.tabBarItem.image=[UIImage imageNamed:@"tianmao"];
    //設定選中時的圖片
    tmallNav.tabBarItem.selectedImage=[UIImage imageNamed:@"tianmao"];
    
    //統一設定導航欄的格式
    [[UINavigationBar appearance] setBarTintColor:[UIColor greenColor]];
    [[UINavigationBar appearance] setTranslucent:NO];
    
    
    
    
    UITabBarController *tabbarC =[[UITabBarController alloc]init];
    // 將頁面放在tabbarcontroller 中
    tabbarC.viewControllers= [NSArray arrayWithObjects:taoNav,tmallNav,nil];
    //把tabbarcontroller 作為window的根檢視
    self.window.rootViewController =tabbarC;
  
    
    return YES;
}

taobao.m

#import "TaoBaoViewController.h"

@interface TaoBaoViewController ()

@end

@implementation TaoBaoViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor=[UIColor blueColor];
    
    self.navigationItem.title=@"淘寶";

}



@end

tmail.m

#import "TmailViewController.h"

@interface TmailViewController ()

@end

@implementation TmailViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor=[UIColor yellowColor];
    self.navigationItem.title=@"天貓";

}


@end