一.隐藏标题栏

ui->tabWidget->tabBar()->hide();//tab->hide()	

二.显示隐藏内容栏(QWidget)

ui->tabWidget->addTab(ui->tab,"端口2");//想要重新显示

ui->tabWidget->removeTab(1);//删除该页，实际该页还在

三.隐藏QDockWidget在tabify后的·标题栏(QTabBar)

3.1 通用样式表（ tab的background、color设为transparent;）

QTabWidget#tabWidgetMenuBar {
    background: rgb(243,243,243);
    border-top: 0px solid #eee;
    border-width:0;
	padding:1px 1px;
}
QTabBar::tab {
    background: transparent;
	height:30px;
	padding:2px 12px;
	color:transparent;
	border-width:0;
    width:0;
}
QTabBar::tab:selected {
    background: rgb(243,243,243);
	color:rgb(43,87,154);
	border-color: #9B9B9B;
    border-bottom-color: #C2C7CB; /* same as pane color */
}
QTabBar::tab:!selected {
	color:gray;
}

3.2 单独样式表

QTabBar::tab {
	color:#fff;
    width:48;

    background: transparent;
	height:30px;
	padding:2px 12px;
    border-width:0;
}
QTabBar::tab:selected {
    background: rgb(243,243,243);
	color:rgb(43,87,154);
    border-color: #9B9B9B;
    border-bottom-color: #C2C7CB; /* same as pane color */
}
QTabBar::tab:!selected {
	color:gray;
}