我目前有一个 CustomTabBarController 类和一个 CustomNavBarController 类。
标签栏有五个标签并且工作正常。导航栏类将三个按钮(主页/消息/个人资料)添加到导航栏的右侧。当我点击主页按钮时，会触发下面的功能。
CustomNavBarController.swift(仅 tappedHome 函数)
func tappedHome(sender: UIButton) {
// Go to home page (tab bar index 0)
}
这是我的 AppDelegate 和 CustomTabBar 文件。
AppDelegate.swift
window?.rootViewController = CustomTabBarController()
let tabBar: UITabBarController = self.window?.rootViewController as! UITabBarController
tabBar.selectedIndex = 0
CustomTabBarController.swift
class CustomTabBarController: UITabBarController, UITabBarControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
self.viewControllers = [createDummyNavControllerWithTitle("News", imageName: "icon_news", viewController: MainController()),
createDummyNavControllerWithTitle("Games", imageName: "icon_games", viewController: GamesController()),
createDummyNavControllerWithTitle("Students", imageName: "icon_students", viewController: StudentsController()),
createDummyNavControllerWithTitle("Ranking", imageName: "icon_rank", viewController: StatsController()),
createDummyNavControllerWithTitle("Info", imageName: "icon_info", viewController: InfoController())]
}
func tabBarController(tabbarController: UITabBarController, didSelectViewController viewController: UIViewController) {
self.title = viewController.title
}
// Shortcut function for the tab bar items
private func createDummyNavControllerWithTitle(title: String, imageName: String, viewController: UIViewController) -> UINavigationController {
viewController.title = title
let navController = UINavigationController(rootViewController: viewController)
navController.tabBarItem.title = title
navController.tabBarItem.image = UIImage(named: imageName)?.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
return navController
}
}
当我单击主页按钮时，我如何告诉 CustomNavBarController.swift 中的函数加载我的标签栏的第一个索引？
PS:我之所以想要两种返回主页的方法，是因为标签栏不会在任何情况下都可见。
最佳答案
在您的 tappedHome(_:) 方法中执行以下代码应该可以解决问题:
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let tabBarController = appDelegate.window!.rootViewController as! UITabBarController
tabBarController.selectedIndex = 0
关于ios - Swift:如何通过按导航栏按钮访问选项卡栏项目，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38999367/