应用大小策略,可以把最大和最小设置为相同,与2楼的说法一样
比如
controlsetForm->resize(311, 417);
QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
sizePolicy.setHorizontalStretch(0);
sizePolicy.setVerticalStretch(0);
sizePolicy.setHeightForWidth(controlsetForm->sizePolicy().hasHeightForWidth());
controlsetForm->setSizePolicy(sizePolicy);
controlsetForm->setMinimumSize(QSize(300, 400)); controlsetForm->setMaximumSize(QSize(314, 432));