- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
// Override point for customization after application launch.
//创建窗口 self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
//只要创建对象类型，就用*
//mainScreen 是类方法
//UIScreen是获取设备屏幕的信息的
UIScreen* mainScreen=[UIScreenmainScreen];
//设置应用的屏幕大小
self.window= [[UIWindowalloc]initWithFrame:[mainScreenbounds]];
//设置应用窗口的颜色
self.window.backgroundColor = [UIColor whiteColor];
//告诉应用windows是应用的主窗口
[self.window makeKeyAndVisible];
//创建具有容器功能的控制器
//展示内容的控制器（导航容器）
HomePageViewController * hpvc = [[HomePageViewController alloc] init];
hpvc.view.backgroundColor = [UIColor yellowColor];
UINavigationController * navigationHPVC = [[UINavigationController alloc] initWithRootViewController:hpvc];
//
CourseViewController * cvc = [[CourseViewController alloc] init];
cvc.view.backgroundColor = [UIColor purpleColor];
UINavigationController * navigationCVC = [[UINavigationController alloc] initWithRootViewController:cvc];
ScheduleViewController * svc=[[ScheduleViewController alloc] init];
svc.view.backgroundColor = [UIColor orangeColor];
UINavigationController *navigationSVC = [[UINavigationController alloc] initWithRootViewController:svc];
PersonalViewController * pvc = [[PersonalViewController alloc] init];
pvc.view.backgroundColor = [UIColor blueColor];
UINavigationController * navigationPVC = [[UINavigationController alloc] initWithRootViewController:pvc];
//创建容器
UITabBarController * tabBarController = [[UITabBarController alloc]init];
NSArray* controllers =@[navigationCVC,navigationPVC,navigationSVC,navigationHPVC];
tabBarController.viewControllers= controllers;
self.window.rootViewController= tabBarController;
NSArray * imgs = @[@"nav01",@"nav02",@"nav03",@"nav04"];
NSArray * sImgs = @[@"nav01on",@"nav02on",@"nav03on",@"nav04on"];
for(inti =0; i
UINavigationController* navic = controllers[i];
//初始化图片，并设置图片的渲染模式为原始图片设置
UIImage * image = [[UIImage imageNamed:imgs[i]]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIImage* selectImage = [[UIImageimageNamed:sImgs[i]]
imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
//tabbar 的默认样式，是上面图片，下面是标题，为了让图片能居中显示，一下做了图片偏移
UITabBarItem* tabbar =[[UITabBarItemalloc]initWithTitle:@""image:imageselectedImage:selectImage];
//设置图片的偏移
[tabbarsetImageInsets:UIEdgeInsetsMake(7, 0, -7, 0)];
navic.tabBarItem= tabbar;
}
//创建容器（选项卡容器每一个选项卡都内置了一个导航容器，）
UITabBarController * tabbarController = [[UITabBarController alloc] init];
tabbarController.viewControllers=@[navigationHPVC,navigationCVC,navigationSVC,navigationPVC];
//展示在窗口上，给UIwindow设置根处理器
self.window.rootViewController= tabbarController;
//一共两个容器：选项卡容器、导航容器（作用：内容和内容之间的切换）
return YES;
}