how to convert a CNPhoneNumber to string in swift4?

问题

I am using this code for getting contact number from contacts app but when I want to show the number in label I get this warning and doesn't work: Cast from 'CNPhoneNumber' to unrelated type 'String' always fails

func contactPicker(_ picker: CNContactPickerViewController, didSelect contacts: [CNContact]) {
    contacts.forEach {(contact) in
        for number in contact.phoneNumbers{
            let phone = number.value
            print(phone)
            numberLabel.text = phone as! String
        }
    }
}

回答1:

TRY :

if let phone = number.value as? CNPhoneNumber {
    print(phone.stringValue)
} else {
   print("number.value not of type CNPhoneNumber")
}

also take a look at CNContact , CNPhoneNumber

回答2:

You can get PhoneNumber value as CNLabeledValue.

for number in contact.phoneNumbers{
    if let number = phoneNumber.value as? CNPhoneNumber, let phoneLabel = phoneNumber.label {
      let phoneLocalizedLabel = CNLabeledValue.localizedStringForLabel(phoneLabel)
          numberLabel.text = "\(phoneLocalizedLabel) : \(number.stringValue)"
    }
}

来源：https://stackoverflow.com/questions/50621917/how-to-convert-a-cnphonenumber-to-string-in-swift4