drop down menu on navigation bar

Question

In android, there is action bar with drop down menu, an example is the old Gmail app in Android:

As you see above, when the three-dots is clicked, a drop down menu is shown.

My Questions:

1. I am wondering, if I want to implement the same three-dots button which shows drop down menu in iOS with Navigation Controller, how to do it?

2. If it is not a common thing to do in iOS, what is the equivalent in iOS?

(I still want to implement it in my iOS project though)

Answer 1

There is no built-in UI component for this in iOS, and it's not widely used in apps.

But when I need to implement it I usually use AssistoLab DropDown, it's a very easy to use, well-documented and stable library.

Answer 2

The closest I can think of is UIPopOverController for iPad. You can put a tableview in a "popover".

Sample popover

For iPhone Popover visit this tutorial

https://richardallen.me/2014/11/28/popovers.html