A small wrapper for ABRecordRef values to take the logic out of doing some of the data fetches.

ABRecordRefWrapper.m

#import "ABRecordRefWrapper.h"

@interface ABRecordRefWrapper ()

@property (nonatomic) ABRecordRef person;

@property (strong, nonatomic) NSArray *numbersCache;
@property (strong, nonatomic) NSString *firstNameCache;
@property (strong, nonatomic) NSString *lastNameCache;

@end

@implementation ABRecordRefWrapper

- (instancetype)initWithABRecordRef:(ABRecordRef)person {
    self = [super init];
    if (self) {
        self.person = person;
    }
    return self;
}

- (NSString *)firstName {
    if (!self.firstNameCache && self.person) {
        self.firstNameCache = (__bridge NSString *)ABRecordCopyValue(self.person, kABPersonFirstNameProperty);
    }
    
    return self.firstNameCache;
}

- (NSString *)lastName {
    if (!self.lastNameCache && self.person) {
        self.lastNameCache = (__bridge NSString *)ABRecordCopyValue(self.person, kABPersonLastNameProperty);
    }
    
    return self.lastNameCache;
}

- (NSString *)fullNameWithOptions:(ABPersonCompositeNameFormat)nameFormat {
    if (!self.person) {
        return nil;
    }
    
    NSString *fullName;
    switch (nameFormat) {
        case kABPersonCompositeNameFormatFirstNameFirst: {
            if ([self firstName]) {
                fullName = [NSString stringWithFormat:@"%@", [self firstName]];
                if ([self lastName]) {
                    fullName = [fullName stringByAppendingFormat:@" %@", [self lastName]];
                }
            } else if ([self lastName]) {
                fullName = [NSString stringWithFormat:@"%@", [self lastName]];
            }
            break;
        }
        case kABPersonCompositeNameFormatLastNameFirst: {
            if ([self lastName]) {
                fullName = [NSString stringWithFormat:@"%@", [self lastName]];
                if ([self firstName]) {
                    fullName = [fullName stringByAppendingFormat:@", %@", [self firstName]];
                }
            } else if ([self firstName]) {
                fullName = [NSString stringWithFormat:@"%@", [self firstName]];
            }
            break;
        }
    }
    
    return fullName;
}

- (NSArray *)phoneNumbers {
    if (!self.numbersCache && self.person) {
        NSMutableArray *phones = [[NSMutableArray alloc] init];
        ABMultiValueRef phoneMulti = ABRecordCopyValue(self.person, kABPersonPhoneProperty);
        for (NSInteger i = 0, end = ABMultiValueGetCount(phoneMulti); i < end; ++i) {
            NSString *phoneNumber = (__bridge NSString *)ABMultiValueCopyValueAtIndex(phoneMulti, i);
            [phones addObject:phoneNumber];
        }
        
        self.numbersCache = [[NSArray alloc] initWithArray:phones];
    }

    return self.numbersCache;
}

- (NSInteger)phoneNumberCount {
    if ([self phoneNumbers]) {
        return [[self phoneNumbers] count];
    }
    
    return -1;
}

- (ABRecordRef)recordReference {
    return self.person;
}

- (void)setRecordReference:(ABRecordRef)person {
    self.person = person;
    
    // Clear out cached values
    self.numbersCache = nil;
    self.firstNameCache = nil;
    self.lastNameCache = nil;
}

@end

ABRecrodRefWrapper.h

#import <Foundation/Foundation.h>
#import <AddressBookUI/AddressBookUI.h>

@interface ABRecordRefWrapper : NSObject

- (instancetype)initWithABRecordRef:(ABRecordRef)person;

- (NSString *)firstName;
- (NSString *)lastName;
- (NSString *)fullNameWithOptions:(ABPersonCompositeNameFormat)nameFormat;
- (NSArray *)phoneNumbers;
- (NSInteger)phoneNumberCount;

- (ABRecordRef)recordReference;
- (void)setRecordReference:(ABRecordRef)person;

@end