pRightSplitter=new QSplitter(Qt::Vertical);

     pRightSplitter->setMouseTracking(true);

     pRightSplitter->setStretchFactor(,);

     pRightSplitter->setStretchFactor(,);

 //pRightTopWidget 为子窗口1

 QSizePolicy rightTopPolicy = pRightTopWidget->sizePolicy();

 rightTopPolicy.setVerticalStretch();

 pRightTopWidget->setSizePolicy(rightTopPolicy);

 //pRightDownWidget 为子窗口2

 QSizePolicy rightDownPolicy = pRightDownWidget->sizePolicy();

 rightDownPolicy.setVerticalStretch();

 pRightDownWidget->setSizePolicy(rightDownPolicy);