QStatusBar* bar = ui->statusBar; //获取状态栏
//还有种写法：
//statusBar()->addWidget(locationLabel);
//statusBar()->addWidget(formulaLabel, 1);
first_statusLabel = new QLabel; //新建标签
first_statusLabel->setMinimumSize(150,20); //设置标签最小尺寸
first_statusLabel->setFrameShape(QFrame::WinPanel); //设置标签形状
first_statusLabel->setFrameShadow(QFrame::Sunken); //设置标签阴影
second_statusLabel = new QLabel;
second_statusLabel->setMinimumSize(150,20);
second_statusLabel->setFrameShape(QFrame::WinPanel);
second_statusLabel->setFrameShadow(QFrame::Sunken);
bar->addWidget(first_statusLabel);
bar->addWidget(second_statusLabel);