Question

我有UITabBar控制器

let tabBarController = UITabBarController()
tabBarController.viewControllers = [todayViewController, forecastViewController]
window.rootViewController = tabBarController
window.makeKeyAndVisible()
tabBarController.selectedIndex = 0

在todayViewController内：

tabBarItem = UITabBarItem(title: "Today", image: #imageLiteral(resourceName: "TodayTabBarItem"), selectedImage: #imageLiteral(resourceName: "SunTabBarItemSelected"))

在forecastViewController内：

tabBarItem = UITabBarItem(title: "Forecast", image: #imageLiteral(resourceName: "ForecastTabBarItem"), selectedImage: #imageLiteral(resourceName: "ForecastTabBarItemSelected"))

当我启动第一个视图控制器的应用UITabBarItem时，它处于非活动状态。当我点击它或另一个时，它变为活动状态（突出显示的文本和右图）

如何在应用启动时激活UITabBarItem？

Answer 1

在调用viewDidLoad期间尝试tabBarItem = UITabBarItem，但在创建ViewContrller时 - 在init

UITabBarItem在应用启动

1 个答案: