UITabBarController中自定义UITabBar

1.创建多个视图控制器，放如UITabBarController中

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AViewController *aa = [[AViewController alloc] init];

UINavigationController* ayNav = [[UINavigationController alloc]initWithRootViewController:aa];

BViewController *bb = [[BViewController alloc] init];

UINavigationController* bNav = [[UINavigationController alloc]initWithRootViewController:bb];

CViewController *cc = [[CViewController alloc] init];

UINavigationController* cNav = [[UINavigationController alloc]initWithRootViewController:cc];

DViewController *dd = [[DViewController alloc] init];

UINavigationController* dNav = [[UINavigationController alloc]initWithRootViewController:dd];

2.初始化tabbar

UITabBarController *tabBarController = [[UITabBarController alloc]init];

tabBarController.delegate=self;

tabBarController.viewControllers=[[NSArray alloc]initWithObjects:ayNav,bNav,cNav,dNav,nil];

3.获取到tabBarController中的tabBar，在从tabBar中获取到每个items

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UITabBar *tabBar = tabBarController.tabBar;

UITabBarItem *aTabBarItem = [tabBar.items objectAtIndex:0];

UITabBarItem *bTabBarItem = [tabBar.items objectAtIndex:1];

UITabBarItem *cTabBarItem = [tabBar.items objectAtIndex:2];

UITabBarItem *dTabBarItem = [tabBar.items objectAtIndex:3];

4. 设置tabBar中items的标题

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aTabBarItem.title = @"aaa";

bTabBarItem.title = @"bbb";

cTabBarItem.title = @"ccc";

dTabBarItem.title = @"ddd";

5.设置tabBar中items的图片

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[aTabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"aa_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"aa.png"]];

[bTabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"bb_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"bb.png"]];

[cTabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"cc_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"cc.png"]];

[dTabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"dd_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"dd.png"]];

6.设置tabBar的背景图片

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// Change the tab bar background

UIImage* tabBarBackground = [UIImage imageNamed:@"tabbarbg.png"];

[[UITabBar appearance] setBackgroundImage:[tabBarBackground resizableImageWithCapInsets:UIEdgeInsetsZero]];

[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabbar_selected.png"]];

7.改变tabBar中items上字体的颜色

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// Change the title color of tab bar items

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:

[UIColor grayColor], UITextAttributeTextColor,

nil nil] forState:UIControlStateNormal];

UIColor *titleHighlightedColor = [UIColor colorWithRed:153/255.0 green:192/255.0 blue:48/255.0 alpha:1.0];

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:

titleHighlightedColor, UITextAttributeTextColor,

nil nil] forState:UIControlStateHighlighted];

8.将tabBarController加入window中

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self.window.rootViewController = tabBarController;

[self.window makeKeyAndVisible];