QTreewidget 设置 CheckBox

设置三态属性 

结果

 遍历勾选项

QStringList selectList;//勾选的项
    QTreeWidgetItemIterator it(ui->treeWidget_output);
    while (*it)
    {
        if((*it)->checkState(0)==Qt::Checked)
        {
            qDebug()<<(*it)->text(0);
            selectList<<(*it)->text(0);
        }
        ++it;
    }