How to access contacts only with email address in address book? - iphone

Question

I am accessing all of the users contacts and emailing them through the app. I can access all of the contacts fine, if they have an email address. If they don't have an email address, then it gives me an error, I am trying to check if they have an email address before I attempt to add the address to the list of addresses. I am using this code. It gives me an error on the line of the if statement here: if ((ABMultiValueCopyValueAtIndex(email, 0) != NULL))
How can I access only the contacts who have email addresses?
NSMutableArray* contactsArray = [NSMutableArray new];
ABAddressBookRef m_addressbook = ABAddressBookCreate();
CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(m_addressbook);
CFIndex nPeople = ABAddressBookGetPersonCount(m_addressbook);
for (int i=0;i < nPeople;i++)
{
NSMutableDictionary* tempContactDic = [NSMutableDictionary new];
ABRecordRef ref = CFArrayGetValueAtIndex(allPeople,i);
CFStringRef firstName, lastName;
firstName = ABRecordCopyValue(ref, kABPersonFirstNameProperty);
lastName = ABRecordCopyValue(ref, kABPersonLastNameProperty);
NSString *name = [NSString stringWithFormat:#"%# %#", firstName, lastName];
[tempContactDic setValue:name forKey:#"name"];
//fetch email id
NSString *strEmail;
ABMultiValueRef email = ABRecordCopyValue(ref, kABPersonEmailProperty);
if ((ABMultiValueCopyValueAtIndex(email, 0) != NULL))
{
CFStringRef tempEmailref = ABMultiValueCopyValueAtIndex(email, 0);
strEmail = (__bridge NSString *)tempEmailref;
[contactsArray addObject:strEmail];
}
}

Answer 1

The error is because you are trying to check whether there are email address available by copying the first item in the array and check if the value is NULL. But if the array is empty you can't copy any items from it.
What you should do is check if the array holds any items:
if (ABMultiValueGetCount(email) > 0) {
// There is at least one item in the email array/
}
Also be aware they your code only copies the first e-mail address for the contact, if more then 1 e-mail is set for that contact you might want to loop thru the e-mail array.

Answer 2

U can use this code to fetch all emails of all users from your contacts.
- (void) getEmailsOfAllContacts
{
ABAddressBookRef _addressBookRef = ABAddressBookCreate();
NSArray * allPeople = (__bridge NSArray *)ABAddressBookCopyArrayOfAllPeople(_addressBookRef);
for (id record in allPeople)
{
CFTypeRef emailProperty = ABRecordCopyValue((__bridge ABRecordRef)record, kABPersonEmailProperty);
NSArray * allEmailArray = ((__bridge NSArray *)ABMultiValueCopyArrayOfAllValues(emailProperty));
NSString * email;
for (int i = 0; i < [allEmailArray count]; i++)
{
email = [allEmailArray objectAtIndex: i];
if (isEmpty(email) == NO)
{
[_allContactsEmailArray addObject: email];
}
}
}
CFRelease(_addressBookRef);
allPeople = nil;
}