iOS15下重寫的導(dǎo)航欄變白失效，無論怎么設(shè)置都沒有效果，解決方案如下：

if (@available(iOS 15.0, *)) {
        UINavigationBarAppearance *navigationBarAppearance = [[UINavigationBarAppearance alloc]init];
        [navigationBarAppearance configureWithOpaqueBackground];
        [navigationBarAppearance setBackgroundImage:[UIImage imageNamed:@"nav_bg"]];
        navigationBarAppearance.titleTextAttributes = @{NSForegroundColorAttributeName:[UIColor whiteColor],NSFontAttributeName:FONT_SIZE(18)};
        self.navigationBar.scrollEdgeAppearance = navigationBarAppearance;
        self.navigationBar.standardAppearance = navigationBarAppearance;
    }

寫法1：

//重寫的導(dǎo)航欄這樣設(shè)置
self.navigationBar.scrollEdgeAppearance = navigationBarAppearance;
self.navigationBar.standardAppearance = navigationBarAppearance;

寫法2：

//控制器中這樣設(shè)置
self.navigationController.navigationBar.scrollEdgeAppearance = navigationBarAppearance;
self.navigationController.navigationBar.standardAppearance = navigationBarAppearance;