ios - CNContactStore.CNContactStore.authorizationStatusForEntityType 不是 .Authorized

Question

我正在尝试获取CNContact。但问题是 CNContactStore.CNContactStore.authorizationStatusForEntityType 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 findContacts() 中从未被调用过。这意味着 print(cnt.count) 不会打印。但为什么。为了获得授权许可，完美的代码是什么？

如果我从 viewDidLoad 调用 findContacts() 方法而不使用 checkPermission() 方法，则应用程序已卡在以下代码上

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

Answer 1

请尝试将其添加到 .plist

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