Parsing preferred phonenumbers with CNPhoneNumber from vcf-file

Question

I try to parse a vcf-file. I use CNContact for this. That works quite well, but with the phonenumbers i have a problem.

With CNLabeledValue<CNPhoneNumber*>* I get the label (e. g. "home") and the phonenumber in the value.

Excerpt from the vCard:

TEL;TYPE=home:1234567890

But if the number is tagged with a "pref" i can't get this tag for the phonenumber.

Excerpt from the vCard:

TEL;TYPE=home,pref:0987654321

Is there anyway to find out, which numbers are the preferred numbers?

I use following code:

for (CNLabeledValue<CNPhoneNumber*>* number in cnContact.phoneNumbers) {
 NSString *label = number.label;
 NSString *number = ((CNPhoneNumber*)number).stringValue;

  //Do some work with label and number
}