实现状态栏显示

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);