UITabBarController

#import "AppDelegate.h"
#import "FrisrtViewController.h"
#import "SecondViewController.h"
#import "ThirdViewController.h"
#import "FourthViewController.h"
#import "FivethViewController.h"
#import "SixthViewController.h"
@interface AppDelegate ()<UITabBarControllerDelegate>

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    self.window  = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    //第一步:创建需要管理的视图对象
    //创建三个视图对象
    FrisrtViewController *firstVC = [[FrisrtViewController alloc] init];
    SecondViewController *secondVC = [[SecondViewController alloc] init];
    ThirdViewController *thirdVC = [[ThirdViewController alloc] init];
    FourthViewController *fourthVC = [[FourthViewController alloc] init];
     FivethViewController *fivethVC = [[FivethViewController alloc] init];
     SixthViewController *sixthVC = [[SixthViewController alloc] init];
    
#pragma mark - 导航控制器
    //创建导航控制器,控制第二个视图控制器
   // UINavigationController *naVC = [[UINavigationController alloc] initWithRootViewController:secondVC];
    //naVC.navigationBar.barTintColor = [UIColor magentaColor];
    
    //设置tabBar的title
    firstVC.tabBarItem.title = @"first";
    secondVC.tabBarItem.title = @"second";
    thirdVC.tabBarItem.title = @"third";
    fourthVC.tabBarItem.title = @"fourth";
    fivethVC.tabBarItem.title = @"fiveth";
    sixthVC.tabBarItem.title = @"sixth";
    //设置tabBar的样式
    //参数1:是一个枚举值,系统的tabBar的样式,参数2:标记点击按钮的tag值
    firstVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemSearch tag:100];
   
    //设置tabBar的样式采取自定义外观
    //未选中状态下的图片
    UIImage *imageUnSelected = [UIImage imageNamed:@"carGary.png"];
    //图片需要保持原有图片的状态
    imageUnSelected = [imageUnSelected imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    //选中状态下的图片设置
    UIImage *imageSelected = [UIImage imageNamed:@"carRed.png"];
    imageSelected = [imageSelected imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    
    //设置tabBarItem的外观
    //参数1:设置tabBarItem的title,参数2:设置原本的image 参数3:设置选中状态下的Image
    secondVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"第二页" image:imageUnSelected selectedImage:imageSelected];
    
    
    UIImage *thirdUnSelected = [UIImage imageNamed:@"findGray.png"];
    thirdUnSelected = [thirdUnSelected imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    UIImage *thirdSelected = [UIImage imageNamed:@"findRed.png"];
    thirdSelected = [thirdSelected imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    thirdVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"第三页" image:thirdUnSelected selectedImage:thirdSelected];
    
    
    UIImage *firstUnSelectedimage = [UIImage imageNamed:@"userGray.png"];
    firstUnSelectedimage = [firstUnSelectedimage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    UIImage *firstSelectedimage = [UIImage imageNamed:@"userRed.png"];
    firstSelectedimage = [firstSelectedimage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    firstVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"第一页" image:firstUnSelectedimage selectedImage:firstSelectedimage];
    
    
    UIImage *fourthUnSelectedimage = [UIImage imageNamed:@"planeGary.png"];
    fourthUnSelectedimage = [fourthUnSelectedimage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    UIImage *fourthSelectedimage = [UIImage imageNamed:@"planeRed.png"];
    fourthSelectedimage = [fourthSelectedimage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    fourthVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"第四页" image:fourthUnSelectedimage selectedImage:fourthSelectedimage];
    
    fivethVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:101];
    sixthVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemHistory tag:102];
    //UITabBar默认最多显示五个按钮,如果多与五个,最后一个会出现More的标志,点击进入时剩下的controller对象
    
    //第二步:创建UITabBarController对象来管理各个视图
    UITabBarController *tabBarVC = [[UITabBarController alloc] init];
    
    
    //第三步:需要将被管理的视图控制器对象放在视图数组属性中
    
    tabBarVC.viewControllers = @[firstVC ,secondVC,thirdVC,fourthVC,fivethVC,sixthVC];
    //设置进入应用默认选中第几个
    tabBarVC.selectedIndex = 2;
    
    //
    UINavigationController *naVC = [[UINavigationController alloc] initWithRootViewController:tabBarVC];

    
    //第四步:将window的根视图控制器交给tabBarController进行管理
    self.window.rootViewController = naVC;
    
#pragma mark - UITabBar属性的相关设置
    //tintColor是tabBar上内容颜色的设置(选中状态的一个颜色)
    tabBarVC.tabBar.tintColor = [UIColor blackColor];
    //设置tabBar的背景颜色
    tabBarVC.tabBar.barTintColor = [UIColor cyanColor];
    //设置tabBar的透明度
    tabBarVC.tabBar.translucent = YES;
#pragma mark - UITabBarItem的一些属性的相关设置
    
    //设置未读消息数目
    firstVC.tabBarItem.badgeValue = @"99";
    secondVC.tabBarItem.badgeValue = @"未读";
    thirdVC.tabBarItem.badgeValue = @"45";
    fourthVC.tabBarItem.badgeValue = @"55";
    fivethVC.tabBarItem.badgeValue = @"66";
    sixthVC.tabBarItem.badgeValue = @"77";
    
#pragma mark - 代理
    
    tabBarVC.delegate = self;
    
    //NavigationBar的默认高度是44(竖屏),TabBar的默认高度是49
    
#pragma mark - UIAppearance设置外观,自iOS8之后才有的方法
    
    //设置全局外观
    //通过[UITabBar appearance]找到UITabBar,从而实现设置其外观
    //注意了:如果使用appearance去设置相应控件的外观,应该在AppDelegate中进行设置
    [[UITabBar appearance] setBarTintColor:[UIColor redColor]];
    [[UITabBar appearance] setTintColor:[UIColor whiteColor]];
    
    //设置导航栏
    
    [[UINavigationBar appearance] setBarTintColor:[UIColor brownColor]];
    [[UINavigationBar appearance] setTintColor:[UIColor lightGrayColor]];
    
    //设置导航栏字体
    [[UINavigationBar appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor magentaColor],NSForegroundColorAttributeName,[UIFont systemFontOfSize:18],NSFontAttributeName, nil]];

    
    
    return YES;
}

#pragma mark - 代理方法
//当tabBar上面的每一个按钮被选中的时候,触发此方法
-(void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
    viewController.tabBarItem.badgeValue = nil;
    //查看当前那个按钮被选中
    NSLog(@"%@",[viewController class]);
}