Display only contacts with right phone number (Contacts Framework)

Question

I want to display only those contacts with particular phone numbers. The phone numbers are written in an array. I don't know how to display only these contacts. Therefore I tried to use the "predicateForEnablingContact" Method. But with my code, all contacts are disabled, even the ones with the right number. I am using the Contacts Framework. Help would be much appreciated.

func picker () {
    let numbers = ["555","8885555512"]
    let pick = CNContactPickerViewController()
    pick.displayedPropertyKeys = [CNContactPhoneNumbersKey]
   pick.predicateForEnablingContact = NSPredicate(format: "phoneNumbers = %@", argumentArray: numbers)
    pick.delegate = self
    presentViewController(pick, animated: true, completion: nil)
}
func contactPicker(picker: CNContactPickerViewController, didSelectContacts contacts: [CNContact]) {
    let Kontakte = contacts
    print(Kontakte)
    dismissViewControllerAnimated(true, completion: nil)
}

Answer 1

This code returns only the contacts that have a phone number in the given set:

let numbers = Set(["555","8885555512"])

let predicate = NSPredicate { (evaluatedObject, bindings) -> Bool in
    guard let evaluatedContact = evaluatedObject as? CNContact else { return false }
    return Set(evaluatedContact.phoneNumbers.map{ return ($0.value as! CNPhoneNumber).stringValue }).intersect(numbers).count > 0
}

Note that numbers is a Set. This is in order to use the intersect method later on. intersect is used to determine if the contact shares any phone numbers with the given numbers; if so, then the predicate results in true .

Answer 2

I used the KPKContacts package

Its as simple as calling this method

var contacts: [KPKContact]()
let contactStore = KPKContactStore()
//make sure you implement the delegate method that will notify contact authorisation changes
contactStore.delegate = self

self.kpkContactStore.findContactsWithValidNumbersOnly(){
    kpkContacts in
    if let contacts = kpkContacts {
        self.contacts = contacts
        self.tableView.reloadData()
    }
}

It comes with a default regex to phone numbers formatted as ### ### ###, ###-###-###, (###) ###-####, #-###-###-###, ###-###-###, #########

You can alternatively get your own regex from regex resources and edit the PHONE_REGEX property in this method

private var regexPhoneNumberValidatorBlock: String -> Bool = { value in
let PHONE_REGEX = "^\\s*(?:\\+?(\\d{1,3}))?[-. (]*(\\d{3})[-. )]*(\\d{3})[-. ]*(\\d{4})(?: *x(\\d+))?\\s*$"
    let phoneTest = NSPredicate(format: "SELF MATCHES %@", PHONE_REGEX)
    let result =  phoneTest.evaluateWithObject(value)
    return result
}