我也希望得到答案 目前只会这样
QToolButton *closeTabButton = new QToolButton(tabWidget);
closeTabButton->setAutoRaise(true);
closeTabButton->setEnabled(false);
closeTabButton->setPalette(pal);
tabWidget->setCornerWidget(closeTabButton, Qt::TopRightCorner);
closeTabButton->setCursor(Qt::ArrowCursor);
closeTabButton->setIcon(QIcon(":/image/closetab.png"));
connect(closeTabButton, SIGNAL(clicked()), this, SLOT(closeTab()));
closeTabButton->setToolTip("关闭当前Tab页");