在Swift中更改UITabBar selectedItem [英] Change UITabBar selectedItem in Swift

问题描述

如何以编程方式更改UITabBar中的所选项目？

How can I programmatically change the selected item in a UITabBar?

推荐答案

Swift 3及更高版本

从Swift 3开始，您还可以使用

Swift 3 and later

As of Swift 3, you can also use

tabBarController.selectedIndex = 0 // (or any other existing index)

（谢谢你，@ nidomiro。）

(Thank you, @nidomiro.)

请尝试以下

tabBar.selectedItem = tabBar.items![newIndex] as! UITabBarItem

假设您有权访问 UITabBarController 拥有 UITabBar ，您可以执行以下操作

Assuming you have access to the UITabBarController that owns the UITabBar, you can do the following

self.selectedViewController = self.viewControllers![newIndex] as! UIViewController

上面的代码行应放在 UITabBarController 子类。

The above line of code should be put somewhere inside of the UITabBarController subclass.

但如果您可以从外部访问标签栏控制器，请执行以下操作

But if you have access to the tab bar controller from "outside," do the following

tabBarController.selectedViewController = tabBarController.viewControllers![newIndex] as! UIViewController

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