在iOS 15中导航栏出现如下情况：

image.png

在storyboard按下图设置

image.png

或者在 UINavigationController中加入如下代码即可

// navigationBar
if #available(iOS 13.0, *) {
    let appearance = UINavigationBarAppearance()
    appearance.configureWithOpaqueBackground()
    appearance.backgroundColor = NorMal_Color
    appearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
    navigationBar.standardAppearance = appearance
    navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance
} else {
    UINavigationBar.appearance().barTintColor = NorMal_Color
    UINavigationBar.appearance().titleTextAttributes = [.foregroundColor: UIColor.white]
    UINavigationBar.appearance().tintColor = .white
}

tababr在iOS 15中出现下图情况

image.png

在storyboard中如下图设置即可

image.png

也可用代码实现：

// tabBar
if #available(iOS 13.0, *) {
    let itemAppearance = UITabBarItemAppearance()
    itemAppearance.normal.titleTextAttributes = [.foregroundColor: NorMal_Color ?? .green]
    itemAppearance.selected.titleTextAttributes = [.foregroundColor: Selected_Color ?? .orange]
    
    let appearance = UITabBarAppearance()
    appearance.stackedLayoutAppearance = itemAppearance
    appearance.configureWithOpaqueBackground()
    appearance.backgroundColor = .white
    tabBarController?.tabBar.standardAppearance = appearance
    if #available(iOS 15.0, *) {
        tabBarController?.tabBar.scrollEdgeAppearance = tabBarController?.tabBar.standardAppearance
    } else {
        // Fallback on earlier versions
    }
}