无法将证书/密钥添加到Xamarin iOS密钥链中

我正在尝试使用SecKeyChain将我的证书和私钥添加到iOS密钥链中。我尝试了SecKeyChain.Add和SecKeyChain.AddIdentity，但第一个返回我SecStatusCode参数，另一个抛出System.InvalidOperationException:Param。有人能帮我解决这个问题吗？从Xamarin网站上很难找到这些方法的详细文档

using(NSData crt = NSData.FromFile("client1.p12"))
{
    X509Certificate2 certificate = new X509Certificate2(crt.ToArray(), password);
    var identity = SecIdentity.Import(certificate.Export(X509ContentType.Pkcs12, password), password);

    var record = new SecRecord(SecKind.Certificate);
    record.Label = "client1_crt";
    record.SetValueRef(identity.Certificate);
    SecStatusCode secStatus = SecKeyChain.Add(record);

    SecKeyChain.AddIdentity(identity)
}

我也试过这样做：

using (NSData crt = NSData.FromFile("client1-crt.der")
{
    SecStatusCode secStatus = SecKeyChain.Add(new SecRecord(SecKind.Certificate)
    {
        ApplicationLabel = "client1_crt",
        KeySizeInBits = 512,
        KeyClass = SecKeyClass.Public,
        ValueData = NSData.FromString(crt)                                                                   
    }); 
}

---

但secStatus仍显示参数。

问题已解决。事实证明，我们需要在authentications.plist文件中启用keychain。详细步骤：