一、UITabbar的黑線(xiàn)問(wèn)題，額外增加如下代碼
? ? UITabBar * tabbar = self.tabBarController.tabBar;
? ? if(@available(iOS13.0, *)) {
? ? ? ? UITabBarAppearance * tabbarAppearance = [tabbar standardAppearance];
? ? ? ? tabbarAppearance.shadowColor= [UIColor clearColor];
? ? ? ? tabbar.standardAppearance = tabbarAppearance;
? ? }
