Nicht in der Lage, vCard von Kontakten mit Kontaktrahmen zu erstellen

Question

Ich verwende diesen Code, um den Kontakt aus dem ios-Telefonbuch in die .vcf-Datei zu exportieren. Ich habe diesen Code für die Aufgabe verwendet. Aber vcardString gibt immer nil zurück. Bitte helfen Sie mir, dieses Problem zu lösen.

NSMutableArray *contacts=[NSMutableArray alloc] init]; 
CNContactStore *store = [[CNContactStore alloc] init]; 
[store requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) { 
    if (!granted) { 
     dispatch_async(dispatch_get_main_queue(), ^{ 
     }); 
     return; 
    } 
    NSMutableArray *contacts = [NSMutableArray array]; 

    NSError *fetchError; 
    CNContactFetchRequest *request = [[CNContactFetchRequest alloc] initWithKeysToFetch:@[CNContactIdentifierKey, [CNContactFormatter descriptorForRequiredKeysForStyle:CNContactFormatterStyleFullName]]]; 

    BOOL success = [store enumerateContactsWithFetchRequest:request error:&fetchError usingBlock:^(CNContact *contact, BOOL *stop) { 
     [contacts addObject:contact]; 
    }]; 
    if (!success) { 
     NSLog(@"error = %@", fetchError); 
    } 

    // you can now do something with the list of contacts, for example, to show the names 

    CNContactFormatter *formatter = [[CNContactFormatter alloc] init]; 

    for (CNContact *contact in contacts) { 

     [contactsArray addObject:contact]; 
     // NSString *string = [formatter stringFromContact:contact]; 

     //NSLog(@"contact = %@", string); 
    } 

    //NSError *error; 
    NSData *vcardString =[CNContactVCardSerialization dataWithContacts:contactsArray error:&error]; 

    NSLog(@"vcardString = %@",vcardString); 
}]; 

Answer 1

Ändern Sie diese Zeile:

CNContactFetchRequest *request = [[CNContactFetchRequest alloc] initWithKeysToFetch:@[[CNContactVCardSerialization descriptorForRequiredKeys]]

Dieser holt alle erforderlichen Informationen für eine vCard zu schaffen.