QMap 与 QVariant 转换

• QMap to QVariant:

QMap<QString, QString> comboData;
comboData.insert("name", fromName);
comboData.insert("email", fromEmail);
QVariant::fromValue(comboData)

• QVariant to QMap:

QVariant v = ui->comboFrom->currentData();
QMap<QString, QString> comboFromMap = v.value<QMap<QString, QString>>();
QString fromName = comboFromMap["name"];
QString fromEmail = comboFromMap["email"];