1、背景色变黑
# oc
if ([@available](https://github.com/available)(iOS 15.0, *)) {
UITabBarAppearance *appearance = [UITabBarAppearance new];
[appearance configureWithOpaqueBackground];
appearance.backgroundColor = [UIColor white];
self.tabBar.standardAppearance = appearance;
self.tabBar.scrollEdgeAppearance = appearance;
} else {
[[UITabBar appearance] setBarTintColor:[UIColor white]];
}
#swift
if #available(iOS 15.0, *) {
let appearance = UITabBarAppearance()
appearance.backgroundColor = UIColor.white
self.tabBar.standardAppearance = appearance
self.tabBar.scrollEdgeAppearance = appearance
}
