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此文以设置QListWidget的自定义菜单为例，其他继承于QWidget的类也都可以按类似的方法去实现。

1、ui文件设置contextMenuPolicy属性为CustomContextMenu

2、添加槽函数

    /*** @brief onCustomContextMenuRequested 右键弹出菜单* @param pos 右键的坐标*/void onCustomContextMenuRequested(const QPoint &pos);/*** @brief onDeleteMediaFolderTriggered 删除选中配置*/void onDeleteMediaFolderTriggered();void Xxxx::onCustomContextMenuRequested(const QPoint &pos)
{QListWidgetItem *item = ui->listWidget->itemAt(pos);if (item != NULL){QMenu menu(this);QAction actionDelete("删除", this);connect(&actionDelete, &QAction::triggered, this, &Xxxx::onDeleteMediaFolderTriggered);menu.addAction(&actionDelete);// 可以添加更多的菜单选项//QAction actionXxxx("xxxx", this);//connect(&actionXxxx, &QAction::triggered, this, &Xxxx::onXxxxMediaFolderTriggered);//menu.addAction(&actionXxxx);menu.exec(QCursor::pos());}
}void Xxxx::onDeleteMediaFolderTriggered()
{int row = ui->listWidget->currentRow();if (row < 0 || row > ui->listWidget->count()){return;}QListWidgetItem *item = ui->listWidget->takeItem(row);if (item != NULL){delete item;item = NULL;}
}

3、连接信号槽

connect(ui->listWidget, &QListWidget::customContextMenuRequested, this, &Xxxx::onCustomContextMenuRequested);

打完收工！