I have a custom `UIView` subclass let's call it `CustomViewA` which I init with `initWithFrame:` and add some UIViews programatically (like a UILabel and so on). Now there is need for another view to be added to `CustomViewA` so I created a `nib` which I lay out some GUI elements inside (one being a `UISegmentedControl`)

Now I'm having some issues on how to correctly add this nib as a subview to `CustomViewA`. Do I need to create .h/.m files for the nib? I want CustomViewA to receive the actions when the segmented control changes values.