我們都知道，如果用storyBoard設置導航欄很容易，點擊左右item的時候，進入下一個界面，導航欄的顏色是跟上一層的是一樣的，用純代碼寫的時候，可以在當前控制器，和從當前控制器進入到下一個控制器都用代碼實現對導航欄的控制，但是，每次都寫代碼設置，很麻煩，所以，可以這樣：
創建一個MainTabBarController的類，在Appdelegate.m里面完成：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.window.rootViewController = [[MainTabBarController alloc] init];
[self.window makeKeyAndVisible];
return YES;
}
然后，在MainTabBarController.m里面
- (void)viewDidLoad {
[super viewDidLoad];
[self setUpAllChildVc];
}
- (void)setUpAllChildVc
{
//有幾個界面，設置幾個
MapViewController *HomeVC = [[HFMapViewController alloc] init];
[self setUpOneChildVcWithVc:HomeVC Image:@"地圖-首頁" selectedImage:@"地圖選中-首頁" title:@"地圖"];
AppointmentViewController *appointmentVC = [[HFAppointmentViewController alloc] init];
[self setUpOneChildVcWithVc:appointmentVC Image:@"預約-首頁" selectedImage:@"預約選中-首頁" title:@"預約"];
}
- (void)setUpOneChildVcWithVc:(UIViewController *)Vc Image:(NSString *)image selectedImage:(NSString *)selectedImage title:(NSString *)title
{
MainNavigationController *nav = [[MainNavigationController alloc] initWithRootViewController:Vc];
UIImage *myImage = [UIImage imageNamed:image];
myImage = [myImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
//tabBarItem，是系統提供模型，專門負責tabbar上按鈕的文字以及圖片展示
Vc.tabBarItem.image = myImage;
UIImage *mySelectedImage = [UIImage imageNamed:selectedImage];
mySelectedImage = [mySelectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
Vc.tabBarItem.selectedImage = mySelectedImage;
Vc.tabBarItem.title = title;
[self addChildViewController:nav];
}
只要需要導航欄的，都可以把當前控制器設置為MainNavigationController的跟試圖控制器