029通过UITabBarController选项卡实现不同界面之间的跳转

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>

2 

3 @interface ViewController : UIViewController

4 @end

ViewController.m

 1 #import "ViewController.h"

 2 

 3 @interface ViewController ()

 4 @end

 5 

 6 @implementation ViewController

 7 

 8 - (id)init {

 9     if (self = [super init]) {

10         //self.title = @"Hello";

11         UIImage *imgIcon = [UIImage imageNamed:@"Ball1.png"];

12         self.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"Hello" image:imgIcon tag:0];

13     }

14     return self;

15 }

16 

17 - (void)viewDidLoad {

18     [super viewDidLoad];

19     

20     UILabel* lblMessage = [[UILabel alloc] initWithFrame:self.view.bounds];

21     lblMessage.text = @"Hello, world!";

22     lblMessage.textAlignment = NSTextAlignmentCenter;

23     lblMessage.textColor = [UIColor blackColor];

24     lblMessage.backgroundColor = [UIColor whiteColor];

25     lblMessage.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

26     [self.view addSubview:lblMessage];

27 }

28 

29 - (void)didReceiveMemoryWarning {

30     [super didReceiveMemoryWarning];

31     // Dispose of any resources that can be recreated.

32 }

33 

34 @end

ViewController2.h

1 #import <UIKit/UIKit.h>

2 

3 @interface ViewController2 : UIViewController

4 @end

ViewController2.m

 1 #import "ViewController2.h"

 2 

 3 @interface ViewController2 ()

 4 @end

 5 

 6 @implementation ViewController2

 7 

 8 - (id)init {

 9     if (self = [super init]) {

10         //self.title = @"您好";

11         UIImage *imgIcon = [UIImage imageNamed:@"Ball2.png"];

12         self.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"您好" image:imgIcon tag:1];

13     }

14     return self;

15 }

16 

17 - (void)viewDidLoad {

18     [super viewDidLoad];

19     

20     UILabel* lblMessage = [[UILabel alloc] initWithFrame:self.view.bounds];

21     lblMessage.text = @"您好，世界！";

22     lblMessage.textAlignment = NSTextAlignmentCenter;

23     lblMessage.textColor = [UIColor whiteColor];

24     lblMessage.backgroundColor = [UIColor blackColor];

25     lblMessage.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

26     [self.view addSubview:lblMessage];

27 }

28 

29 - (void)didReceiveMemoryWarning {

30     [super didReceiveMemoryWarning];

31     // Dispose of any resources that can be recreated.

32 }

33 

34 @end

AppDelegate.h

1 #import <UIKit/UIKit.h>

2 

3 @interface AppDelegate : UIResponder <UIApplicationDelegate>

4 @property (strong, nonatomic) UIWindow *window;

5 @property (strong, nonatomic) UITabBarController *tabBarController;

6 

7 @end

AppDelegate.m

 1 #import "AppDelegate.h"

 2 #import "ViewController.h"

 3 #import "ViewController2.h"

 4 

 5 @interface AppDelegate ()

 6 @end

 7 

 8 @implementation AppDelegate

 9 

10 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

11     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

12     _tabBarController = [[UITabBarController alloc] init];

13     ViewController *tab1 = [[ViewController alloc] init];

14     ViewController2 *tab2 = [[ViewController2 alloc] init];

15     [_tabBarController setViewControllers:@[tab1, tab2] animated:NO];

16     

17     _window.rootViewController = _tabBarController;

18     [_window addSubview:_tabBarController.view];

19     [_window makeKeyAndVisible];

20     

21     return YES;

22 }

23 

24 - (void)applicationWillResignActive:(UIApplication *)application {

25 }

26 

27 - (void)applicationDidEnterBackground:(UIApplication *)application {

28 }

29 

30 - (void)applicationWillEnterForeground:(UIApplication *)application {

31 }

32 

33 - (void)applicationDidBecomeActive:(UIApplication *)application {

34 }

35 

36 - (void)applicationWillTerminate:(UIApplication *)application {

37 }

38 

39 @end