ios13隐藏tabbar上面的横线总结

最近项目上遇到了一个小问题，手机升级ios13之后，隐藏tabbar上面的横线失效了。然后Google了半天，从github的CYLTabBarController开源项目第#463issues找到了一个解决方法，完美。下面代码是ios13之前的隐藏方法：

[[UITabBar appearance] setBackgroundImage:[[UIImage alloc]init]];
[[UITabBar appearance] setShadowImage:[[UIImage alloc]init]];
[UITabBar appearance].backgroundColor = [UIColor whiteColor];//根据自己的情况设置

ios13之后隐藏方法为：

UITabBarAppearance *standardAppearance = [[UITabBarAppearance alloc] init];
standardAppearance.backgroundColor = [UIColor whiteColor];//根据自己的情况设置
standardAppearance.shadowColor = [UIColor clearColor];//也可以设置为白色或任何颜色
self.tabBar.standardAppearance = standardAppearance;

综合起来的代码为：

if (@available(iOS 13.0, *)) {
        UITabBarAppearance *standardAppearance = [[UITabBarAppearance alloc] init];
        standardAppearance.backgroundColor = [UIColor whiteColor];//根据自己的情况设置
        standardAppearance.shadowColor = [UIColor clearColor];//也可以设置为白色或任何颜色
        self.tabBar.standardAppearance = standardAppearance;
    }else{
        [[UITabBar appearance] setBackgroundImage:[[UIImage alloc]init]];
        [[UITabBar appearance] setShadowImage:[[UIImage alloc]init]];
        [UITabBar appearance].backgroundColor = [UIColor whiteColor];//根据自己的情况设置
    }