Swift 3 - How do I create a prominent button on a tab bar (e.g. camera button) [duplicate]

Question

I am using Swift 3, Xcode 8.2.

I want to something like this (ignore the Oscars-themed fill) where the camera button is a bit more prominent/encircled on the tab bar:

I assume the whole thing is an image but is that image just naturally raised off the tab bar in some way?

Any resources or if you can point me in the right direction would be great. Thank you!

EDIT

I may have found another article that explains what I want to do: How do we create a bigger center UITabBar Item

Answer 1

One way is to simply add your UIButton on top of UITabBarController with the dummy center view controller.

Here I use storyboard and subclass UITabBarController to add that button:

This is my storyboard, note how the center view controller is just there for space:

With only those code and storyboard, this is the result:

Project here: https://github.com/aunnnn/TestButtonOnTabBar/