How to open Add Contact form through app

How to open native Contact form with some prefilled data using Contacts Framework.

Add ContactsUI framework. Import it in your viewcontroller like this

 import ContactsUI

Add and Call this following method from respective viewcontroller.

  func addExistingContact() {
    if #available(iOS 9.0, *) {
        let contactPicker = CNContactPickerViewController()
        contactPicker.delegate = self
        self.presentViewController(contactPicker, animated: true, completion: nil)
    } else {
        // Fallback on earlier versions
    }

}