objective c - Error at ABPeoplePickerNavigationControllerDelegate - XCode -

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i'm following tutorial accessing contact list. i`m getting error on following line @ viewcontroller.h

@interface viewcontroller : uiviewcontroller <abpeoplepickernavigationcontrollerdelegate>

why abpeoplepickernavigationcontroller getting error? error message "cannot find protocol declaration"

you need add:

#import <addressbookui/addressbookui.h>

to .h file , add addressbookui framework project.


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