Swift中的自定义/常用工具栏(Custom/common toolbar in Swift)

 我对Swift很新，我正在开发一个我不确定如何设置导航的应用程序。 它适用于标签栏，但我希望条形图显示正在显示的视图。 用户应始终能够访问4个“主要”视图。 当我进入其中一个主要观点的子视图时，问题就来了。 
 
 我有标签栏，主视图有4个图标。 它目前正在显示“活动列表”。 当用户单击某个活动时，它将在下一个详细级别显示一个列表。 但是，该视图不是标签栏中显示的主要视图之一，因此它没有标签栏，也无法直接转换到其中一个主视图。 您必须先退回到“活动”列表，然后才能选择其他选项卡。 
 
 假设主视图（在标签栏中表示）是A，B，C和D.我希望能够在所有子视图上显示相同的工具栏（例如C-1，C-2等）并允许直接转换到任何其他主视图，而无需用户手动退出每个子视图。 
 
 实现这一目标的“最佳”方法是什么？ 1）我应该创建一个在每个视图控制器上实现的自定义工具栏对象吗？ 2）它应该是标签栏和工具栏的组合吗？ 3）如果我已经钻进了一堆视图，在切换到不同的选项卡之前，是否需要单独弹出所有这些视图？ 4）我用什么作为“根”视图？ 
 
 谢谢你的任何建议。 我已经找到了，但还没有找到一个像这样的场景的例子。 

I'm quite new to Swift and am working on an app where I'm not sure how to setup the navigation. It works with a tab bar, except that I want the bar to display nomatter what view is being displayed. There are 4 "main" views that the user should always be able to get to. The problem comes when I get into subviews of one of those main views. 
 
I have the tab bar with the 4 icons for the primary views. It's currently displaying the "activity list". When the user clicks on an activity, it will display a list at the next level of detail. However, that view is not one of the primary ones that is represented in the tab bar, so it has no tab bar and no way to transition directly to one of the primary views. You have to back your way out to the Activity list before you can select a different tab.
 
Say that the main views (represented in the tab bar) are A, B, C, and D. I want to be able to display the same toolbar on all sub-views (e.g. C-1, C-2, etc.) and allow direct transition to any of the other main views, without the user having to manually back out of each sub-view.
 
What is the "best" way to accomplish this? 1) Should I be creating a custom toolbar object that gets implemented on every view controller? 2) Should it be a combination of tab bar and tool bars? 3) If I have drilled into a stack of views, do I need to pop all of those views individually before I can switch to a different tab? 4) What do I use as my "root" view?
 
Thanks for any suggestions. I have hunted, but haven't found an example of a scenario quite like this.

原文：https://stackoverflow.com/questions/28800687