Swift Using Contacts Framework, search using phone number to get Name and User Image

Question

I have an API that returns phone numbers in format: +1415xxxxxxx (E164)

Right now these numbers are put into a Cell of a UITableView and are presented as expected, however I'd like to be able to search the users contacts on the phone to see if the there is a match - if so also pass back the Firstname, last name and known photo.

Looking at the Apple pages (https://developer.apple.com/library/watchos/documentation/Contacts/Reference/Contacts_Framework/index.html) I need to

 import ContactsUI

but then Im unsure, do I load the contactDB into a dictionary and then search it? I can find lots of things on searching via name and less on searching via number:

  let predicate = CNContact.predicateForContactsMatchingName("Sam") 

Im trying to get to a function that I can call, that searches using the PhoneNumber and gives me back the FirstName, FamilyName and Image.

  func searchForContactUsingNumber(PhoneNumber: String)
 {

 // Search Via phoneNumber
  let store = CNContactStore()
  let contacts = try store.unifiedContactsMatchingPredicate(CNContact.predicateForContactsMatchingPhoneNumber(PhoneNumber), keysToFetch:[CNContactGivenNameKey, CNContactFamilyNameKey,CNContactImageData])

  return FirstName, GivenName,UIImage

 }

I get the feeling I'm going about this backwards but not sure which way is forwards.. Any ideas?

Answer 1

import UIKit import Contacts

class PhonebookVC: UIViewController ,UITableViewDataSource,UITableViewDelegate {

@IBOutlet weak var ContactTblView: UITableView!
@IBOutlet weak var SearchTxtField: SkyFloatingLabelTextField!



var contacts = [CNContact]()
var NameArray = [String]()
var NumberArray = [String]()

var filteredName = [String]()
var filteredNumber = [String]()


override func viewDidLoad() {
    super.viewDidLoad()
    getContacts()
    SearchTxtField.delegate = self
    // Do any additional setup after loading the view.
}

@IBAction func SearchFunc(_ sender: UIButton) {

}


func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return self.filteredName.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = ContactTblView.dequeueReusableCell(withIdentifier: "cell") as! PhonebookCell
    cell.ContactName.text = self.filteredName[indexPath.row]
    cell.ContactNumber.text = self.filteredNumber[indexPath.row]
    return cell
}




/*
// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    // Get the new view controller using segue.destination.
    // Pass the selected object to the new view controller.
}
*/

}

extension PhonebookVC {

func getContacts()
{
    let status = CNContactStore.authorizationStatus(for: .contacts)
    if status == .denied || status == .restricted {
        presentSettingsActionSheet()
        return
    }

    // open it

    let contactStore = CNContactStore()
    contactStore.requestAccess(for: .contacts) { granted, error in
        guard granted else {
            DispatchQueue.main.async {
                self.presentSettingsActionSheet()
            }
            return
        }

        // get the contacts
        let keys = [
            CNContactFormatter.descriptorForRequiredKeys(for: .fullName),
            CNContactPhoneNumbersKey as CNKeyDescriptor] as [Any]
        let request = CNContactFetchRequest(keysToFetch: keys as! [CNKeyDescriptor])
        do {
            try contactStore.enumerateContacts(with: request){
                (contact, stop) in
                // Array containing all unified contacts from everywhere
                self.contacts.append(contact)
                var i = 0
                for phoneNumber in contact.phoneNumbers {

                        print("\(contact.givenName) \(contact.familyName)\n \(phoneNumber.value.stringValue)")

                        self.NameArray.append("\(contact.givenName) \(contact.familyName)")
                        self.NumberArray.append(phoneNumber.value.stringValue)
                        i = i+1

                }
                i = 0

                self.filteredName   = self.NameArray
                self.filteredNumber = self.NumberArray

                self.ContactTblView.reloadData()
            }
        } catch {
            print("unable to fetch contacts")
        }
    }
}

func presentSettingsActionSheet() {
    let alert = UIAlertController(title: "Permission to Contacts", message: "This app needs access to contacts in order to Send top-up.", preferredStyle: .actionSheet)
    alert.addAction(UIAlertAction(title: "Go to Settings", style: .default) { _ in
        let url = URL(string: UIApplication.openSettingsURLString)!
        UIApplication.shared.open(url)
    })
    alert.addAction(UIAlertAction(title: "Cancel", style: .cancel))
    present(alert, animated: true)
}

}

extension PhonebookVC : UITextFieldDelegate { func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { self.filteredName.removeAll() self.filteredNumber.removeAll()

    if(self.NameArray.count != 0){


        var mystring = "\(textField.text ?? "")\(string)"
        if(textField.text?.count == 1 && string == ""){

            mystring = ""
        }
        var i = 0
        for ContactName in self.NameArray {
            let name = ContactName
            let range = name.lowercased().range(of: mystring, options: .caseInsensitive, range: nil,   locale: nil)

            if range != nil {
                if(filteredName.count == 0){

                    filteredName = [ContactName]
                    filteredNumber = [NumberArray[i]]

                }else{

                    filteredName.append(ContactName)
                    filteredNumber.append(NumberArray[i])
                }

            }
            i = i+1
        }

        if(string == "" && (textField.text?.count == 1)){

            self.filteredName   = self.NameArray
            self.filteredNumber = self.NumberArray

        }

        self.ContactTblView.reloadData()
    }
    return true
}

}