Introduction

Framework
/System/Library/Frameworks/AdSupport.framework
Header file directories
/System/Library/Frameworks/AdSupport.framework/Headers
Declared in
ASIdentifierManager.h

The Ad Support framework provides apps with access to an identifier that can be used only for serving advertisements, as well as a flag which indicates whether a user has limited ad tracking. Accessing the advertising identifier requires apps to read and honor the opt-out flag.