qtabwidget设置tab标题宽度_tabwidget添加页面

        widget1=newQWidget;

    first1=new Ui::First;

    first1->setupUi(widget1);

    widget2=new QWidget;

    second1=new Ui::Second;

    second1->setupUi(widget2);

    third1=new Ui::Third;

    widget3=new QWidget;

    third1->setupUi(widget3);

    tab=new QTabWidget(this);

    tab->addTab(widget1,"First1");

    tab->addTab(widget2,"First2");

    tab->addTab(widget3,"First3");

    tab->resize(300,300);

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