如何使用 Contacts with Swift 对联系人进行排序

我已经阅读了有关对联系人进行排序的苹果官方文档，尽管我不确定如何实现它。 所以，这是获取请求：

let fetchRequest = CNContactFetchRequest(keysToFetch: keysToFetch)

和我喜欢的排序顺序：

let sortOrder = CNContactSortOrder.UserDefault

这就是我通常获取联系人的方式：

    do {
        try store.enumerateContactsWithFetchRequest(fetchRequest, usingBlock: { (let contact, let stop) -> Void in
                self.contacts.append(contact)
        })
    }
    catch let error as NSError {
        print(error.localizedDescription)
    }

现在我该怎么办sortOrder？我应该在哪里以及应该在整个获取过程中包含哪些内容？

更新为 Swift 4.0

let fetchRequest = CNContactFetchRequest(keysToFetch: [CNContactGivenNameKey as CNKeyDescriptor, CNContactFamilyNameKey as CNKeyDescriptor, CNContactMiddleNameKey as CNKeyDescriptor, CNContactEmailAddressesKey as CNKeyDescriptor,CNContactPhoneNumbersKey as CNKeyDescriptor])

        fetchRequest.sortOrder = CNContactSortOrder.userDefault

        let store = CNContactStore()

        do {
            try store.enumerateContacts(with: fetchRequest, usingBlock: { (contact, stop) -> Void in
              //  print(contact.phoneNumbers.first?.value ?? "not found")

            })
        }
        catch let error as NSError {
            print(error.localizedDescription)
        }

旧版像这样写

 fetchRequest.sortOrder = CNContactSortOrder.UserDefault

创建 fetchRequest 对象后 所以你的最终输出就像

let fetchRequest = CNContactFetchRequest(keysToFetch: keysToFetch)

fetchRequest.sortOrder = CNContactSortOrder.UserDefault

 do {
        try store.enumerateContactsWithFetchRequest(fetchRequest, usingBlock: { (let contact, let stop) -> Void in
                self.contacts.append(contact)
        })
    }
    catch let error as NSError {
        print(error.localizedDescription)
    }