iOS Frameworks

iOS comes with a lot of frameworks that enables developers to perform complex tasks easily. You have already been using the UIKit framework.

For more information on how to use the framework, check the documentation on the developer website.

We going to see how to use the Contacts framework.

Picking a contact

To pick a contact, you create CNContactPickerViewController, and then provide a delegate to handle events. The CNContactPickerViewController comes from the ContactsUI.

var contactPicker = new CNContactPickerViewController();
// Make the current class the delegate
contactPicker.Delegate = this;

// Present the controller
PresentViewController(contactPicker, true, null);

Since we made the delegate the current class, we will need to implement an interface, ICNContactPickerDelegate as follows:

public partial class ViewController : UIViewController, ICNContactPickerDelegate {

}

Handle selected contact

To get the contact, we implement the method DidSelectContact() as follows:

[Export("contactPicker:didSelectContact:")]
public void DidSelectContact(CNContactPickerViewController picker, Contacts.CNContact contact)
{
    Debug.WriteLine($"Selected contact {contact.GivenName} {contact.PhoneNumbers[0].Value.StringValue}");
}