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自定义UITabBar

Posted on Jun 05, 2015 By anchoriteFili

正常使用的TabBar

UITabBarController *tabBar = [[UITabBarController alloc] init];
    
    TotleViewController *totleVC = [[TotleViewController alloc] init];
    UINavigationController *totleNVC = [[UINavigationController alloc] initWithRootViewController:totleVC];
    SViewController *searchVC = [[SViewController alloc] init];
    UINavigationController *searchNVC = [[UINavigationController alloc] initWithRootViewController:searchVC];
    
    tabBar..selectedIndex = 1; //默认初始化选择某个页面
    tabBar.viewControllers = @[totleNVC,searchNVC];
    self.window.rootViewController = tabBar;
1.创建多个视图控制器，放如UITabBarController中
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
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
aTabBarItem.title = @"aaa";
bTabBarItem.title = @"bbb";
cTabBarItem.title = @"ccc";
dTabBarItem.title = @"ddd";
5.设置tabBar中items的图片
[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
// 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
// Change the title color of tab bar items
    [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                       [UIColor grayColor], UITextAttributeTextColor,
                                                       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] forState:UIControlStateHighlighted];
8.将tabBarController加入window中
self.window.rootViewController = tabBarController;
[self.window makeKeyAndVisible];