选中或突出显示时全局更改 UIBarButtonItem 文本颜色

您didFinishLaunchingWithOptions的AppDelegate女巫中有您的函数，它告诉委托启动过程几乎完成并且应用程序几乎可以运行了。

在那里你可以appearance在你的UIBarButtonItem和UINavigationBar.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Text
    UIBarButtonItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.green], for: .normal)
    UIBarButtonItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.darkGray], for: .selected)

    // Images
    UINavigationBar.appearance().tintColor = UIColor.orange

    return true
}

结果：