I am working on iOS Address Book but having some issues, I am referring the iOS programming guide which says
Prompting the User to Choose a Person Record:
The ABPeoplePickerNavigationController class allows users to browse their
list of contacts and select a person and, at your option, one of that
person’s properties. To use a people picker, do the following:
Create and initialize an instance of the class.
Set the delegate, which must adopt the ABPeoplePickerNavigationControllerDelegate protocol.
Optionally, set displayedProperties to the array of properties you want displayed. The relevant constants are defined as integers; wrap
them in an NSNumber object using the numberWithInt: method to get an
object that can be put in an array.Present the people picker as a modal view controller using the presentModalViewController:animated: method. It is recommended that
you present it using animation.
Point one says Create and initialize an instance of the class, its init methods includes withnibname other property is inputview, can this be used to customize address book gui?
point three is also pointing towards displayedProperties, address book gui can be modified?
Like whatsapp, viber, etc .. I also want to customize the address book
so I can also display status under contacts name, so I can display
custom image as accessories etc etc. Please check the screenshots.

I believe they are not using the build in ABPeoplePickerNavigationController Class.
They fethc all the users from the address book and populate it into a table view.
I don’t know of any way to customize the ABPeoplePickerNavigationController Class.