Qt判断操作系统代码

http://blog.163.com/qimo601@126/blog/static/1582209320138249210813/

Qt4的时候是如下宏定义。Qt5，有所不同。

#include <QtGlobal>
...
#ifdef Q_OS_MAC
// mac
#endif

#ifdef Q_OS_LINUX
// linux
#endif

#ifdef Q_OS_WIN32
// win
#endif

See QtGlobal documentation for further information.

代码例子：

#ifdef Q_OS_LINUX

    ui->portNameComboBox->addItem( "ttyUSB0");

    ui->portNameComboBox->addItem( "ttyUSB1");

    ui->portNameComboBox->addItem( "ttyUSB2");

    ui->portNameComboBox->addItem( "ttyUSB3");

    ui->portNameComboBox->addItem( "ttyS0");

    ui->portNameComboBox->addItem( "ttyS1");

    ui->portNameComboBox->addItem( "ttyS2");

    ui->portNameComboBox->addItem( "ttyS3");

    ui->portNameComboBox->addItem( "ttyS4");

    ui->portNameComboBox->addItem( "ttyS5");

    ui->portNameComboBox->addItem( "ttyS6");

#elif defined (Q_OS_WIN32)

    ui->portNameComboBox->addItem("COM0");

    ui->portNameComboBox->addItem("COM1");

    ui->portNameComboBox->addItem("COM2");

    ui->portNameComboBox->addItem("COM3");

    ui->portNameComboBox->addItem("COM4");

    ui->portNameComboBox->addItem("COM5");

    ui->portNameComboBox->addItem("COM6");

    ui->portNameComboBox->addItem("COM7");

    ui->portNameComboBox->addItem("COM8");

    ui->portNameComboBox->addItem("COM9");

    ui->portNameComboBox->addItem("COM10");

    ui->portNameComboBox->addItem("COM11");

    ui->portNameComboBox->addItem("COM12");

    ui->portNameComboBox->addItem("COM13");

    ui->portNameComboBox->addItem("COM14");

    ui->portNameComboBox->addItem("COM15");

#endif

可以自己查看qt帮助文档