QML 中使用信号和槽接收 QSqlQueryModel 信号

{"title":"QML 中使用信号和槽接收 QSqlQueryModel 信号","description":"详细介绍如何在 QML 中使用信号和槽机制来接收 QSqlQueryModel 中的信号，包括 QSqlQueryModel 的创建、信号连接、槽函数定义以及示例代码。","keywords":"QML, QSqlQueryModel, 信号, 槽, 连接, rowCountChanged, queryChanged, 数据库, QtSql, 示例代码","content":""import QtQuick 2.0\nimport QtQuick.Controls 2.0\nimport QtSql 2.0\n\nItem {\n id: root\n\n property QSqlQueryModel model: QSqlQueryModel {}\n\n Connections {\n target: root.model\n\n onRowCountChanged: {\n console.log("Row count changed:", rowCount)\n }\n\n onQueryChanged: {\n console.log("Query changed:", query)\n }\n }\n\n Component.onCompleted: {\n // 设置查询语句\n model.query = "SELECT * FROM table_name"\n // 执行查询\n model.query.execute()\n }\n}\n"\n"}