如果你的NavigationDrawer里面的Item没有响应,Drawer不能左滑关闭,应该是因为你没有把主要内容放在DrawerLayout标签下的第一位. The main content view (the FrameLayout above) must be the first child in the DrawerLayout because the XML order implies z-ordering and the drawer must be on top of the c…
使用currentIndex()或者currentText() void Widget::calc() { int first = ui->firstLineEdit->text().toInt(); int second = ui->secondLineEdit->text().toInt(); int result; switch(ui->comboBox->currentIndex()) { case 0: result = first + second; ui-…