UIday1302:标签视图控制器 UITabBarController

标签视图控制器 UITabBarController

 ViewController  //控制视图 控制n个viewController

 //控制控制器

 NavigationController  //除了控制n个viewController还可以控制n个TabBarController

 TabBarController  //除了控制n个viewController还可以控制n个navigationController

 NC控制多个TC TC再控制VC

 TC控制多个NC NC再控制VC

注意:

如果tabBar上的图标有一层蒙版, 这种情况有可能是图标的图片有问题, 先检查图片大小是否超大, 或者图片是否重复等.

AppDelegate.m

#import "AppDelegate.h"
#import "TabBarViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (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];
    
    // 创建好一个标签控制器
    TabBarViewController * tabC = [[TabBarViewController alloc]init];
    
    // 一般使用tabBarController作为根视图控制器
    self.window.rootViewController = tabC;
    
    //换肤 appearance是个单例
    [[UITabBar appearance]setBarTintColor:[UIColor blueColor]];
    [[UITabBar appearance]setBackgroundImage:[UIImage imageNamed:@"202.png"]];
    
    //navigationBar换肤
    [[UINavigationBar appearance]setBarTintColor:[UIColor yellowColor]];
    [[UINavigationBar appearance]setBackgroundImage:[UIImage imageNamed:@"202.png"] forBarMetrics:(UIBarMetricsDefault )];
        
    return YES;
}
@end
 
           

TabBarViewController.m

#import "TabBarViewController.h"
#import "YellowViewController.h"
#import "BlueViewController.h"
#import "GreenViewController.h"
#import "RedViewController.h"
#import "GrayViewController.h"
#import "OrangaViewController.h"

@interface TabBarViewController ()<UITabBarControllerDelegate>

@end

@implementation TabBarViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    //创建视图控制器  (tabBarItem设置在这里才会一起显示出来，当前默认显示出来的是第一个视图控制器，alloc init 此时并不会加载后面的视图控制器)
    YellowViewController * yellowVC = [[YellowViewController alloc]init];
    yellowVC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemContacts tag:110];
    //角标
    yellowVC.tabBarItem.badgeValue = @"99+";
    
    //每个视图控制器单独设置自己的tabBarItem
    BlueViewController * blueVC = [[BlueViewController alloc]init];
    blueVC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:111];
    blueVC.tabBarItem.badgeValue = @"哈罗";
    
    GreenViewController * greenVC = [[GreenViewController alloc]init];
    greenVC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemFavorites tag:112];
    greenVC.tabBarItem.badgeValue = @"hello";
    
    RedViewController * redVC = [[RedViewController alloc]init];
    redVC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:113];
    redVC.tabBarItem.badgeValue = @"5";
    
    GrayViewController * grayVC = [[GrayViewController alloc]init];
    grayVC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemRecents tag:115];
    
    OrangaViewController * orangaVC = [[OrangaViewController alloc]init];
    orangaVC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemSearch tag:116];
    
    //所有显示的controller都显示在这个数组里
    //这里最多可以显示5个，5个以上的会在第五个显示一个more图标，点即more图标可以看到没有显示的其他几个controller
    //平常设计 建议最多不要超过4个
    self.viewControllers = @[yellowVC,blueVC,greenVC,redVC];
    
    //选中要显示的视图控制器，以数组下标为依据
    self.selectedIndex = 0;
    
    //自己设置自己的代理
    self.delegate = self;
    
    //换颜色
    self.tabBar.barTintColor = [UIColor greenColor];
    
    //换图片
//    self.tabBar.backgroundImage = [UIImage imageNamed:@"202.png"];
//    NSLog(@"Image = %@",[UIImage imageNamed:@"202.png"]);
    
    

    
    //是每个UIViewController的
//    self.navigationItem
    
}

#pragma mark ----tabBarController Delegate

//选中响应的controller
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
    NSLog(@"%@",viewController);
    //取消小圆点
    viewController.tabBarItem.badgeValue = nil;
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end