有一个方法，从soap中接收结果：
SDZPaymentResult* result = (SDZPaymentResult*)value;
如果我用：NSLog(@"%@", result);
就会显示：
<CXMLElement 0x20d9c950 [0x20dccc40] ns1:paymentResult
<ns1:paymentResult>
<additionalData xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<authCode xmlns="http://payment.services.adyen.com">76419</authCode>
<dccAmount xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<dccSignature xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<fraudResult xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<issuerUrl xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<md xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<paRequest xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<pspReference xmlns="http://payment.services.adyen.com">8813677969778790</pspReference>
<refusalReason xmlns="http://payment.services.adyen.com" xsi:nil="true"/>
<resultCode xmlns="http://payment.services.adyen.com">Authorised</resultCode>
</ns1:paymentResult>>
有没有方法能将这些结果转换为NSString？
