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We then create our reference to the iPhone Address Book with a call to ABAddressBookCreate():

        ABAddressBookRef iPhoneAddressBook = ABAddressBookCreate();

And then we create a new person record:

        ABRecordRef newPerson = ABPersonCreate();
 

At this point, we haven’t saved anything to the address book yet, but we can start adding data to the person record. To do this, we use ABRecordSetValue, but some fields need to be formatted differently from others. For some, like first name and last name, we can just pass in a string:

        ABRecordSetValue(newPerson, kABPersonFirstNameProperty, @”John”, &error);
        ABRecordSetValue(newPerson, kABPersonLastNameProperty, @”Doe”, &error);

kABPersonFirstNameProperty and kABPersonLastNameProperty are constants defined by Apple that specify which fields you’re saving. They’re listed in the XCode documentation under Personal Information Properties in the ABPerson Reference document. We can also set some other fields in this manner, such as company and title:

        ABRecordSetValue(newPerson, kABPersonOrganizationProperty, @”Model Metrics”, &error);
        ABRecordSetValue(newPerson, kABPersonJobTitleProperty, @”Senior Slacker”, &error);

Where it gets a bit trickier is when we want to set our phone, email, or address properties, because these fields use ABMutableMultiValueRef rather than strings to store the data, and the specific data types of the values vary a bit depending on which one we’re talking about. For phone, we would do something like this:

 
        ABMutableMultiValueRef multiPhone = ABMultiValueCreateMutable(kABMultiStringPropertyType);
        ABMultiValueAddValueAndLabel(multiPhone, @”1-555-555-5555″, kABPersonPhoneMainLabel, NULL);
        ABMultiValueAddValueAndLabel(multiPhone, @”1-123-456-7890″, kABPersonPhoneMobileLabel, NULL);            
        ABMultiValueAddValueAndLabel(multiPhone, @”1-987-654-3210″, kABOtherLabel, NULL);        
        ABRecordSetValue(newPerson, kABPersonPhoneProperty, multiPhone,nil);
        CFRelease(multiPhone);
       

 The first two phone types (kABPersonPhoneMainLabel and kABPersonPhoneMobileLabel) are listed as Phone Number Properties in the ABPerson Reference, along with kABPersonPhoneHomeFAXLabel, kABPersonPhoneWorkFAXLabel, and kABPersonPhonePagerLabel. Despite the fact that the two fax numbers and the pager number seem fairly useless (you can’t send a fax from your phone, and who has a pager anymore?) but there’s nothing listed there for Other, or Work Phone or anything like that. That’s where the Generic Property labels come into play:

      kABWorkLabel;
      kABHomeLabel;
      kABOtherLabel;

Those will file the phone numbers as Work, Home, and Other, respectively. After adding the values to the ABMutableMultiValueRef, we need to call ABRecordSetValue, only this time instead of passing a string in for the third parameter, we pass in multiPhone. Then be sure to free up the memory with CFRelease.

Adding email addresses to the record is pretty similar to adding phone numbers, where we create an ABMutableMultiValueRef of strings:

        ABMutableMultiValueRef multiEmail = ABMultiValueCreateMutable(kABMultiStringPropertyType);
        ABMultiValueAddValueAndLabel(multiEmail, @”johndoe@modelmetrics.com”, kABWorkLabel, NULL);
        ABRecordSetValue(newPerson, kABPersonEmailProperty, multiEmail, &error);
        CFRelease(multiEmail);

Where it gets a little different is when we go to set the street address values. While we do still use an ABMutableMultiValueRef, we won’t be using kABMultiStringPropertyType. To set the street address, we use kABMultiDictionaryPropertyType instead, so we have to create an NSMutableDictionary, and the method calls end up being a bit different:

            ABMutableMultiValueRef multiAddress = ABMultiValueCreateMutable(kABMultiDictionaryPropertyType);
           
            NSMutableDictionary *addressDictionary = [[NSMutableDictionary alloc] init];

            [addressDictionary setObject:@"750 North Orleans Street, Ste 601" forKey:(NSString *) kABPersonAddressStreetKey];
            [addressDictionary setObject:@"Chicago" forKey:(NSString *)kABPersonAddressCityKey];
            [addressDictionary setObject:@"IL" forKey:(NSString *)kABPersonAddressStateKey];
            [addressDictionary setObject:@"60654" forKey:(NSString *)kABPersonAddressZIPKey];

            ABMultiValueAddValueAndLabel(multiAddress, addressDictionary, kABWorkLabel, NULL);
            ABRecordSetValue(newPerson, kABPersonAddressProperty, multiAddress,&error);
            CFRelease(multiAddress);

kABWorkLabel means that we’re setting this as the contact’s work address. And to add it to the contact record, we call ABRecordSetValue as before, releasing the memory afterward.

 The last step is to add the new record to the address book, and save it back to the device:

        ABAddressBookAddRecord(iPhoneAddressBook, newPerson, &error);
        ABAddressBookSave(iPhoneAddressBook, &error);

And then we can check for any errors:

        if (error != NULL)
        {

                  NSLog(@”Danger Will Robinson! Danger!”);

        }

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