/// <summary>
/// Record the date this application was installed (or the date that we started recording installation date).
/// </summary>
public static DateTime StampInstallDate(this UIApplicationDelegate @this, string name, string key)
{
try
{
var query = new SecRecord(SecKind.GenericPassword)
{
Service = name, Account = key
};
SecStatusCode secStatusCode;
var queriedRecord = SecKeyChain.QueryAsRecord(query, out secStatusCode);
if (secStatusCode != SecStatusCode.Success)
{
queriedRecord = new SecRecord(SecKind.GenericPassword)
{
Label = name + " Install Date",
Service = name,
Account = key,
Description = string.Format("The first date {0} was installed", name),
Generic = NSData.FromString(DateTime.UtcNow.ToString())
};
var err = SecKeyChain.Add(queriedRecord);
if (err != SecStatusCode.Success)
{
System.Diagnostics.Debug.WriteLine("Unable to save stamp date!");
}
}
else
{
DateTime time;
if (!DateTime.TryParse(queriedRecord.Generic.ToString(), out time))
{
SecKeyChain.Remove(query);
}
}
return(DateTime.Parse(NSString.FromData(queriedRecord.Generic, NSStringEncoding.UTF8)));
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.Message);
return(DateTime.Now);
}
}
