CNContactStore.CNContactStore.authorizationStatusForEntityType不是.Authorized

Question

我在试着让CNContact。但问题是，CNContactStore.CNContactStore.authorizationStatusForEntityType在任何时候都不是.Authorized。

import Contacts
import ContactsUI

class ContactViewController: UIViewController
   var store = CNContactStore()
   override func viewDidLoad() {
       checkPermission()
   }



func checkPermission(){
        switch CNContactStore.authorizationStatusForEntityType(.Contacts){
          case .Authorized:
            let cnt = findContacts()
            print(cnt.count)

        case .NotDetermined:
            store.requestAccessForEntityType(.Contacts){succeeded, err in
                guard err == nil && succeeded else{
                    return
                }
               let cnt = findContacts()
               print(cnt.count)
            }
        default:
            print("Not Handled")
        }
    }

    func findContacts() -> [CNContact] {

       let keysToFetch =     [CNContactFormatter.descriptorForRequiredKeysForStyle(.FullName),
        CNContactImageDataKey,CNContactEmailAddressesKey,CNContactUrlAddressesKey,CNContactNoteKey,
            CNContactPhoneNumbersKey,CNContactPostalAddressesKey]

        let fetchRequest = CNContactFetchRequest(keysToFetch: keysToFetch)
        fetchRequest.unifyResults = true
        var contacts = [CNContact]()
        do {
            try store.enumerateContactsWithFetchRequest(fetchRequest, usingBlock: { (let contact, let stop) -> Void in
                contacts.append(contact)
            })
        }
        catch let error as NSError {
            print(error.localizedDescription)
        }

        return contacts
    }
}

在checkPermission()方法中，findContacts()不称为ever.That意思是打印(cnt.count)，不打印。但是为什么呢。对于获得授权许可，什么才是最完美的代码？

如果我从没有findContacts()方法的viewDidLoad调用checkPermission()方法，那么应用程序挂起了下面的代码

try store.enumerateContactsWithFetchRequest(fetchRequest, usingBlock: { (let contact, let stop) -> Void in
                    contacts.append(contact)
                })

Answer 1

请把这个添加到.plist中

<key>NSContactsUsageDescription</key>
    <string>This app requires contacts from phone book.</string>

Answer 2

尝尝这个

func initContacts() {
//        titleArr.removeAll();
        CoreContextNDelegate.sharedInstance().requestForAccess { (accessGranted) -> Void in
            if accessGranted {
                //let predicate = CNContact.predicateForContactsMatchingName("Joshna")
                let keys = [
                    CNContactFormatter.descriptorForRequiredKeys(for: .fullName),
                    CNContactGivenNameKey, CNContactFamilyNameKey,
                    CNContactEmailAddressesKey,
                    CNContactPhoneNumbersKey,
                    CNContactImageDataAvailableKey,
                    CNContactThumbnailImageDataKey
                ] as [Any]
//                let keys = [CNContactGivenNameKey, CNContactFamilyNameKey, CNContactEmailAddressesKey, CNContactBirthdayKey, CNContactImageDataKey]
                let request = CNContactFetchRequest(keysToFetch: keys as! [CNKeyDescriptor]);
                //var contacts = [CNContact]()
                var message: String!

                //let contactsStore = CoreContextNDelegate.sharedInstance().getContactStore();
                do {
                    //   contacts = try contactsStore.unifiedContactsMatchingPredicate(predicate, keysToFetch: keys)
                    try CoreContextNDelegate.sharedInstance().getContactStore().enumerateContacts(with: request) {
                        contact, stop in
                        print(contact.givenName)
                        print(contact.familyName)
                        print(contact.identifier)

                        for phoneNumber in  contact.phoneNumbers {
                            let contacts: Contact = Contact()!
                            contacts.givenName = contact.givenName+" "+contact.middleName+" "+contact.familyName
                            if let value = phoneNumber.value as? CNPhoneNumber {
                                if let digit = value.value(forKey: "digits") as? String {
                                    contacts.phoneNumbers = digit;

                                }
                            }
                            self.contactList.append(contacts)
                        }

                        self.filteredContactList = self.contactList;
                    }
                    DispatchQueue.main.async {
                        self.initTableViewData();
                    }
                }
                catch {
                    message = "Unable to fetch contacts."
                    DispatchQueue.main.async {
                        self.initTableViewData();
                    }

                }


                if message != nil {
                    DispatchQueue.main.async(execute: { () -> Void in
                        print(message);
                        //AppDelegate.getAppDelegate().showMessage(message)
                    })
                }
                else {

                }
            }
        }

    }

有关更多信息，请查看这些urls https://developer.apple.com/reference/contacts。

https://www.safaribooksonline.com/library/view/ios-9-swift/9781491936689/ch04.html

https://code.tutsplus.com/tutorials/ios-9-an-introduction-to-the-contacts-framework--cms-25599