如何在QMainWindow中为3个小部件创建一个标签化停靠栏？我正在使用下面的代码:widget1=newQDockWidget(this);widget1->setObjectName("name1");addDockWidget(Qt::LeftDockWidgetArea,widget1);widget2=newQDockWidget(this);widget2->setObjectName("name2");addDockWidget(Qt::LeftDockWidgetArea,widget2);tabifyDockWidget(widget2,widget1);widge