UITabBarController：UITabBarItem更新或重新加载它

2024-05-14 • 问答

如何更新或重新加载UITabBarItem上的文本颜色？

只有在我终止该应用程序并重新打开后，它才会运行。然后，它将刷新UITabBarItem上的textColor

Swift 5.1，iOS 12

   func handleRefreshForTabBar() {

        DispatchQueue.main.async {
            //Background
            self.view.backgroundColor = Theme.current.generalBackground

            //Images
            self.tabBar.tintColor = Theme.current.tabTintColor

            //Bar
            self.tabBar.barTintColor = Theme.current.tabBarTintColor
          }
    }


    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        handleRefreshForTabBar()

        UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: Theme.current.tabBarSelectedTextColor],for: .selected)
        UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: Theme.current.tabBarNormalTextColor],for: .normal)
    }

我尝试过的选项

tabBar.setNeedsDisplay()
tabBar.setNeedsLayout()

view.reloadInputViews()
view.setNeedDisplay()
view.setNeedsLayout()

我的TabBar是我的rootVC

/// Function that makes the tab bar refresh itself. Specially important for refreshing light or dark mode styles func handleRefreshForTabBar() { DispatchQueue.main.async { //Set up the same color as the NavBar to avoid bugs self.view.backgroundColor = Theme.current.generalBackground //Images self.tabBar.tintColor = Theme.current.tabTintColor //Bar self.tabBar.barTintColor = Theme.current.tabBarTintColor self.tabBar.items!.forEach { (item) in item.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: Theme.current.tabBarSelectedTextColor],for: .selected) item.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: Theme.current.tabBarNormalTextColor],for: .normal) } } }

UITabBarController：UITabBarItem更新或重新加载它

mddxfsh 回答：UITabBarController：UITabBarItem更新或重新加载它

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