HALAddressBook.m

#import "HALAddressBook.h"

@implementation HALAddressBook

- (BOOL)isAccessGranted
{

    ABAddressBookRef m_addressbook =  ABAddressBookCreateWithOptions(NULL, NULL);

    __block BOOL accessGranted = NO;
    if (ABAddressBookRequestAccessWithCompletion != NULL) {
        dispatch_semaphore_t sema = dispatch_semaphore_create(0);
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
            @autoreleasepool {
                // Write your code here...
                // Fetch data from SQLite DB
            }
        });


        ABAddressBookRequestAccessWithCompletion(m_addressbook, ^(bool granted, CFErrorRef error)
        {
          accessGranted = granted;

          dispatch_semaphore_signal(sema);
                        });

        dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
    }

    if (accessGranted) {
        // Access has been granted
       self.contacts = (__bridge NSArray *)(ABAddressBookCopyArrayOfAllPeople(m_addressbook));

        return YES;

    } else {
    // Access has not been granted
    return NO;
    }
}
@end