Permission Contacts in Xamarin Forms iOS - xamarin

Question

I met an error display when I tried to access user contact to fetch all contacts: The splash screen hide the permission dialog.
Did anyone meet this error before?
Interface:
public interface IUserContactsService
{
List<PhoneContactInfo> GetAllPhoneContacts(IEnumerable<int> filterIds = null);
}
UserContactService.cs:
[assembly: Dependency(typeof(UserContactService))]
namespace Test.iOS
{
public class PhoneContact
{
public string FirstName { get; set; }
public string LastName { get; set; }
public string PhoneNumber { get; set; }
public string Name { get => $"{FirstName} {LastName}"; }
}
public class UserContactService : IUserContactsService
{
string phoneNumber(string number)
{
string callNumber = number;
int i = 0;
while (i < callNumber.Length)
{
if (callNumber[i] == ' ' || callNumber[i] == 160 || callNumber[i] == '-')
callNumber = callNumber.Remove(i, 1);
else
i++;
}
return callNumber;
}
public List<PhoneContactInfo> GetAllPhoneContacts(IEnumerable<int> filterIds = null)
{var keysTOFetch = new[] { CNContactKey.GivenName, CNContactKey.FamilyName, CNContactKey.EmailAddresses };
NSError error;
CNContact[] contactList;
var ContainerId = new CNContactStore().DefaultContainerIdentifier;
using (var predicate = CNContact.GetPredicateForContactsInContainer(ContainerId))
using (var store = new CNContactStore())
{
contactList = store.GetUnifiedContacts(predicate, keysTOFetch, out error);
}
var contacts = new List<PhoneContactInfo>();
foreach (var item in contactList)
{
if (null != item && null != item.EmailAddresses)
{
contacts.Add(new PhoneContactInfo
{
contactName = item.GivenName,
contactNumber = item.PhoneNumbers.ToString()
});
}
}
return contacts;
}
}

Answer 1

Here is my solution:
public List<PhoneContactInfo> GetAllPhoneContacts (IEnumerable<int> filterIds = null)
{
// if the app was not authorized then we need to ask permission
if (ABAddressBook.GetAuthorizationStatus() == ABAuthorizationStatus.Authorized)
{
GetContacts();
}
else Console.WriteLine("Error");
}