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这个感觉像是有个标题栏可以点击箭头折叠显示
这一块
说错了右边 QSplitter *splitter = new QSplitter(Qt::Vertical, this);
QListView *listview = new QListView;
QTreeView *treeview = new QTreeView;
QTextEdit *textedit = new QTextEdit;
splitter->addWidget(listview);
splitter->addWidget(treeview);
splitter->addWidget(textedit);
splitter->setHandleWidth(0);