How to show Back and Done button on CNContactViewController?

I create new CNContactViewController for add new contacts on phone directory but when I navigate to controller CNContactViewController navigation back button is hidden. Following my code.

    CNContactStore *store = [[CNContactStore alloc] init];
    CNMutableContact *contact = [[CNMutableContact alloc] init];
    contact.familyName = @"name_1";
    contact.givenName = @"xyz";

    CNLabeledValue *homePhone = [CNLabeledValue 
    labeledValueWithLabel:CNLabelHome value:[CNPhoneNumber 
    phoneNumberWithStringValue:@"0123456789"]];
    contact.phoneNumbers = @[homePhone];

    CNContactViewController *contactVC = [CNContactViewController 
    viewControllerForNewContact:contact];
    contactVC.contactStore = store;
    contactVC.delegate = (id)self;
    [self.navigationController pushViewController:contactVC animated:TRUE];

Please suggest me best solution for showing back & Done button using Objective-C or Swift-3.