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一、UITabBarController對象的創建和初始化

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首先創建多個視圖控制器，并在tabBarItem中添加標題和圖片

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???self.viewController.tabBarItem.title?=?@"首頁";//設置tabBarItem標題

????self.viewController.tabBarItem.image?= [UIImage?imageNamed:@"icon_home"];//添加圖片

????self.viewController.tabBarItem.badgeValue?=?@"1";//消息

????FirstViewController?*one = [[FirstViewController?alloc]?init];

????one.tabBarItem.title?=?@"消息";

????one.tabBarItem.image?= [UIImage?imageNamed:@"icon_meassage"];

????SecondViewController?*two = [[SecondViewController?alloc]?init];

????two.tabBarItem.title?=?@"聯系人";

????two.tabBarItem.image?= [UIImage?imageNamed:@"icon_selfinfo"];

????ThirdViewController?*three = [[ThirdViewController?alloc]?init];

???three.title?=?@"搜索";

????three.tabBarItem.image?= [UIImage?imageNamed:@"icon_search"];

????ForthViewController?*four = [[ForthViewController?alloc]?init];

????four.tabBarItem.title?=?@"更多";

????four.tabBarItem.image?= [UIImage?imageNamed:@"icon_more"];

????FifthViewController?*five = [[FifthViewController?alloc]init];

????five.tabBarItem.title?=?@"訂閱";

????SixthViewController?*six = [[SixthViewController?alloc]?init];

????six.tabBarItem.title?=?@"下載";

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????UINavigationController?*nav = [[UINavigationController?alloc]initWithRootViewController:three];

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??注意，第三個視圖控制器為導航控制器?

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將多個視圖控制器添加到數組（視圖超過5個以后，自動生成More，隱藏多出來的視圖控制器）

效果為多出來下邊一排視圖切換工具

????NSArray?*vcArray = [NSArray?arrayWithObjects:self.viewController, one, two, nav, four, five, six,?nil];//創建視圖控制器數組?

????UITabBarController?*tabBarC = [[UITabBarController?alloc]?init];

????tabBarC.tabBar.selectedImageTintColor?= [UIColor?redColor];//選中時圖片顏色變為紅色

????tabBarC.viewControllers?= vcArray;//將多個視圖控制器組織到tab控制器中，以選項卡

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???self.window.rootViewController?= tabBarC;//設置根視圖控制器為tabBarController

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二、UITabBarController可以實現UITabBarControllerDelegate協議

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tabBarC.delegate?=?self; //設置self為代理

可以重寫代理中方法（很少用），表示選中了某個ViewController

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-(void)tabBarController:(UITabBarController?*)tabBarController didSelectViewController:(UIViewController*)viewController{

//執行相應操作

}

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//代碼解說

- (BOOL)application:(UIApplication?*)application didFinishLaunchingWithOptions:(NSDictionary?*)launchOptions

{

????self.window?= [[[UIWindow?alloc]?initWithFrame:[[UIScreen?mainScreen]?bounds]]?autorelease];

????FirstViewController?*firstController=[[FirstViewController?alloc]?init];

????//設置標題

????firstController.title=@"First";

????//設置tabBarItem的樣式（這種方式是按照系統定義的方式）

????firstController.tabBarItem=[[UITabBarItem?alloc]?initWithTabBarSystemItem:UITabBarSystemItemMoretag:101];

????//也可以用自定義方式方式如下：

????

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????SecondViewController?*secondController=[[SecondViewController?alloc]?init];

????secondController.title=@"Second";

????secondController.tabBarItem=[[UITabBarItem?alloc]?initWithTabBarSystemItem:UITabBarSystemItemHistorytag:102];

????ThirdViewController?*thirdController=[[ThirdViewController?alloc]?init];

????thirdController.title=@"Third";

????thirdController.tabBarItem=[[UITabBarItem?alloc]?initWithTabBarSystemItem:UITabBarSystemItemFavoritestag:103];

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????UINavigationController?*nav1=[[UINavigationController?alloc]?initWithRootViewController:firstController];

????[firstController?release];

????UINavigationController?*nav2=[[UINavigationController?alloc]?initWithRootViewController:secondController];

????[secondController?release];

????UINavigationController?*nav3=[[UINavigationController?alloc]?initWithRootViewController:thirdController];

????[thirdController?release];

????NSArray?*controllersArray=[[NSArrayalloc]?initWithObjects:nav1,nav2,nav3,?nil];

????[nav1?release];

????[nav2?release];

????[nav3?release];

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????UITabBarController?*tabController=[[UITabBarController?alloc]?init];

????tabController.viewControllers=controllersArray;

????tabController.selectedIndex=0;

????tabController.delegate=self;//在AppDelegate.h文件內實現UITabBarControllerDelegate協議

????self.tabBarController=tabController;

????[tabController?release];

????[controllersArray?release];

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????[self.window?addSubview:tabController.view];

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????[self.window?makeKeyAndVisible];

????returnYES;

}

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//當點擊tabBarItem時觸發該操作??UITabBarControllerDelegate中的一個方法

- (void)tabBarController:(UITabBarController?*)tabBarController didSelectViewController:(UIViewController?*)viewController?{

????NSLog(@"%d",?viewController.tabBarItem.tag);

}

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轉載于:https://www.cnblogs.com/zfrankice/p/4238998.html

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