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1. Setting the Icon for Windows

  • Create an .ico file (this can contain multiple resolutions in one file).
  • Place the .ico file in your project directory.
  • In your .pro file, add the following line to reference the icon file:
  • pro
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    RC_ICONS = path/to/icon.ico
  • This line tells Qt to include the .ico file in the build, so it will appear as the application icon on Windows.

2. Setting the Icon for macOS

  • Create an .icns file (specific to macOS).
  • Place the .icns file in your project directory.
  • In the .pro file, add:
  • pro
    Copy code
    ICON = path/to/icon.icns
  • This will set the application icon for macOS applications.

3. Setting the Icon for Linux

  • For Linux, you generally set the icon for the application window, rather than the app file itself.
  • In your main code, use the setWindowIcon() method on the main window:
  • cpp
    Copy code
    QIcon icon("path/to/icon.png"); mainWindow.setWindowIcon(icon);
  • Note that Linux desktop environments often require .desktop files to specify application icons system-wide. This file typically goes in /usr/share/applications and references your icon.

By adding these settings to your project, Qt will package the icon for the respective platforms.

 

 

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