QT实现简单树形结构,QTreeWidget的使用
ui->treeWidget->setColumnCount(2);//设置树结构列的数量
ui->treeWidget->setHeaderLabel(QStringLiteral("省份"));//设置这一列的
QTreeWidgetItem *province = new QTreeWidgetItem(ui->treeWidget,QStringList(QStringLiteral("江苏省")));
QTreeWidgetItem *city1 = new QTreeWidgetItem(province,QStringList(QStringLiteral("南京")));
QTreeWidgetItem *city2 = new QTreeWidgetItem(province,QStringList(QStringLiteral("常州")));
ui->treeWidget->expandAll();//全部展开
效果图: