将顶部栏添加到所有视图都可见的iOS应用程序
问题描述：
在标签栏iOS应用程序中添加顶部栏（视图）的最佳方法是什么，它总是保留在所有视图之上，而不管选择哪个标签如下图所示？
What is the best way to add a topbar(View) in a tabbar iOS application that always remain on top of all the views, irrespective of which tab is selected like the image below?
答
我会使用UIViewControllerContainment。看看
I would use UIViewControllerContainment. Take a look at
我的方式设置它有一个UIViewController有两个ContainerViews。一个ContainerView将包含UITabBarController，另一个将具有顶部栏的UIViewController。
The way I'd set it up is have a UIViewController that has two ContainerViews. One ContainerView will have the UITabBarController in it and the other would have the UIViewController for the top bar.
这是我在UIStoryboard中做的
Here is what I did in a UIStoryboard