// 1. 请求授权
    // 1.获取授权的状态
    ABAuthorizationStatus status = ABAddressBookGetAuthorizationStatus();

    // 2.判断授权状态,如果是未决定状态,才需要请求
    if (status == kABAuthorizationStatusNotDetermined) {
        // 2.1.创建通信录对象
        ABAddressBookRef addressBook = ABAddressBookCreate();

        // 2.2.请求授权
        ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) {
        if (granted) {
            NSLog(@"授权成功");
        } else {
            NSLog(@"授权失败");
        }
    });
    }

// 2. 判断授权状态, 如果已授权, 则继续; 未授权, 则提示用户, 并返回;

    // 1.获取授权的状态
    ABAuthorizationStatus status = ABAddressBookGetAuthorizationStatus();

    // 2.如果用户已经授权
    if (status != kABAuthorizationStatusAuthorized) return;

// 3. 创建通讯录对象
    ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL);

// 4. 从通信录对象中, 获取所有的联系人
    CFArrayRef peopleArray = ABAddressBookCopyArrayOfAllPeople(addressBook);

// 5. 遍历所有的联系人(每一个联系人都是一条记录)
    CFIndex peopleCount = CFArrayGetCount(peopleArray);
    for (CFIndex i = 0; i < peopleCount; i++) {

// 6.获取到联系人
    ABRecordRef person = CFArrayGetValueAtIndex(peopleArray, i);

// 7.获取姓名
    NSString *lastname = (__bridge_transfer NSString *)ABRecordCopyValue(person, kABPersonLastNameProperty);
    NSString *firstName = (__bridge_transfer NSString *)ABRecordCopyValue(person, kABPersonFirstNameProperty);
    NSLog(@"%@ %@", lastname, firstName);

    // 8. 获取电话号码
    ABMultiValueRef multiValue = ABRecordCopyValue(record, kABPersonPhoneProperty);
    CFIndex count = ABMultiValueGetCount(multiValue);
    for (int i = 0; i < count; i ++) {
        NSString *label = (__bridge_transfer NSString *)ABMultiValueCopyLabelAtIndex(multiValue, i);
        NSString *phone = (__bridge_transfer NSString *)ABMultiValueCopyValueAtIndex(multiValue, i);
        NSLog(@"%@---%@", label, phone);

    }
    CFRelease(multiValue);
}

9. 释放不再使用的对象
    CFRelease(peopleArray);
    CFRelease(addressBook);