How to receive array from js？use QWebChannel

[my name is wind]

js：

new QWebChannel(qt.webChannelTransport, function(channel) {
        // make dialog object accessible globally
        var js_object = channel.objects.jsObject;
        
        $("#save_data").click(function(){
                var aa = new Array('name', 'c');
                alert(JSON.stringify(aa));
                js_object.receiveText(JSON.stringify(aa));
            }
            
        });
    });

qt

void PickerJsObject::receiveText(const QString &r_text)
{


     qDebug()<<r_text;



     QJsonParseError error;
     QJsonDocument message = QJsonDocument::fromJson(messageData.toUtf8(), &error);
     if (error.error) {
         qWarning() << "Failed to parse text message as JSON object:" << messageData
                    << "Error is:" << error.errorString();
         return;
     } else if (!message.isObject()) {
         qWarning() << "Received JSON message that is not an object: " << messageData;
         return;
     }

 

}

console output：

"[\"name\",\"c\"]"
Received JSON message that is not an object:  "[\"name\",\"c\"]"

JS how to return an array of data to QT? JS returns what format? QT and how to receive and parse, please enlighten.