创建on 之后,如何在Swift上以编程方式添加 导航 界面。这是我当前的代码:TabBarController``AppDelegate/didFinishLaunchingWithOptions
TabBarController``AppDelegate/didFinishLaunchingWithOptions
self.window = UIWindow(frame: UIScreen.mainScreen().bounds) let tabBarController = UITabBarController() let purchaseViewController = PurchaseViewController(nibName: "PurchaseViewController", bundle: nil) let financeViewController = FinanceViewController(nibName: "FinanceViewController", bundle: nil) tabBarController.viewControllers = [purchaseViewController, financeViewController] self.window!.rootViewController = tabBarController self.window!.makeKeyAndVisible()
我在看文档。它具有以下准则
- (void)applicationDidFinishLaunching:(UIApplication *)application { self.tabBarController = [[UITabBarController alloc] init]; MyViewController1* vc1 = [[MyViewController1 alloc] init]; MyViewController2* vc2 = [[MyViewController2 alloc] init]; MyViewController3* vc3 = [[MyViewController3 alloc] init]; MyNavRootViewController* vc4 = [[MyNavRootViewController alloc] init]; UINavigationController* navController = [[UINavigationController alloc] initWithRootViewController:vc4]; NSArray* controllers = [NSArray arrayWithObjects:vc1, vc2, vc3, navController, nil]; tabBarController.viewControllers = controllers; window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; window.rootViewController = tabBarController; [window makeKeyAndVisible]; }
问题,我不知道如何在Swift上正确执行此操作。我希望在NavigationBar中的单独方法中设置和修改AppDelegate。有什么想法吗?
NavigationBar
AppDelegate
要创建导航控制器,请使用:
var navigationController = UINavigationController(rootViewController: viewController));
然后将其放入数组中:
tabBarController.viewControllers = [purchaseViewController, financeViewController, navigationController]
但是,只有在加载视图控制器后,才能将UIControls添加到导航栏。在applicationDidFinishLaunching:这是不可能的,因为的导航栏为零。正确的方法是在viewDidLoad()中向NavigationBar添加控件
applicationDidFinishLaunching: