IOS學習筆記UITabBarController使用教程

實現一個簡單的UITabBar:

AppDelegate.m

代碼如下

複製代碼

- (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];                    UILabel *lab = [[UILabel alloc]initWithFrame:CGRectMake(320/2-140/2, 80, 140, 40)];     lab.text = @"王振";     lab.textAlignment = UITextAlignmentCenter;     lab.backgroundColor = [UIColor blueColor];     [self.window addSubview:lab];          //your code     UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(320/2-140/2,480/2-40/2, 140, 40)];     label.text = @"Hello World";     label.backgroundColor = [UIColor cyanColor];     label.textAlignment = UITextAlignmentCenter;     [self.window addSubview:label];          HomeViewController *view1 = [[HomeViewController alloc]init];     UINavigationController *v1 = [[UINavigationController alloc]initWithRootViewController:view1];            MessageViewController *view2 = [[MessageViewController alloc]init];     UINavigationController *v2 = [[UINavigationController alloc]initWithRootViewController:view2];          SearchViewController *view3 = [[SearchViewController alloc]init];     UINavigationController *v3 = [[UINavigationController alloc]initWithRootViewController:view3];          SettingViewController *view4 = [[SettingViewController alloc]init];     UINavigationController *v4 = [[UINavigationController alloc]initWithRootViewController:view4];               //NSArray *arr = @[view1,view2,view3,view4];          NSArray *viewControllers = [NSArray arrayWithObjects:v1,v2,v3,v4 , nil];            UITabBarController *mainViewController = [[UITabBarController alloc]init];     mainViewController.viewControllers = viewControllers;     //[mainViewController setViewControllers:mainViewController];          //[mainViewController release];     [UIApplication sharedApplication].applicationIconBadgeNumber = 2;          [self.window setRootViewController:mainViewController];               return YES; }

HomeViewController.m

代碼如下

複製代碼

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];     if (self) {         // Custom initialization         self.title = @"首頁";         self.tabBarItem.badgeValue = @"New";       }     return self; }   -(void)loadView {     UIView *view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];     view.backgroundColor = [UIColor whiteColor];     self.view = view;   }

技巧：
給Iphone表徵圖添加數字提示：self.tabBarItem.badgeValue = 8；