UITabBarController整理

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专题名：UITabBarController

UI：UITabBarItem图片尺寸：30*30px。

一、创建TabBae：

1、根页面创建：

UITabBarController如果要作为整个程序的rootViewController，则在application delegate中的 applicationDidFinishLaunching:方法中添加如下代码：（以下代码带导航栏）

    HSHomeViewController *hsHome = [[HSHomeViewController alloc]init];    UINavigationController *homeNav = [[UINavigationController alloc]initWithRootViewController:hsHome];        HSOpenInfoViewController *hsOpen = [[HSOpenInfoViewController alloc]init];    UINavigationController *openNav = [[UINavigationController alloc]initWithRootViewController:hsOpen];        HSMyInfoViewController *hsMy = [[HSMyInfoViewController alloc]init];    UINavigationController *myNav = [[UINavigationController alloc]initWithRootViewController:hsMy];        HSMoreViewController *hsMore = [[HSMoreViewController alloc]init];    UINavigationController *moreNav = [[UINavigationController alloc]initWithRootViewController:hsMore];        UITabBarController * tabBar = [[UITabBarController alloc]init];    tabBar.viewControllers =[NSArray arrayWithObjects:homeNav,openNav,myNav,moreNav, nil];      self.window.rootViewController = tabBar;

二、改变每个tab的内容：

1、IOS7.0以上版本：创建方法：

UITabBarItem *item1 = [[UITabBarItem alloc]initWithTitle:@"彩票大厅" image:[UIImage imageNamed:@"tab_home_false.png"] selectedImage:[UIImage imageNamed:@"tab_home_true.png"]];<pre name="code" class="objc">viewController2.tabBarItem = item;

IOS7.0以下版本：创建方法：

UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:@"Second" image:nil tag:2];[item setFinishedSelectedImage:[UIImage imageNamed:@"second.png"]  withFinishedUnselectedImage:[UIImage imageNamed:@"first.png"]];viewController2.tabBarItem = item;

2、属性badgeValue，该属性可以在其右上角显示一个小的角标，通常用于提示用户有新的消息。

3、改变tabBarItem的文字颜色：

   [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor grayColor], UITextAttributeTextColor, nil] forState:UIControlStateNormal];   [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor], UITextAttributeTextColor, nil] forState:UIControlStateHighlighted];

4、改变tabBar的图标颜色：

    UITabBar *tabBar = [tabBarCtr tabBar];    [tabBar setTintColor:[UIColor redColor]];

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