How to set application icon in a Qt-based project?

Question

How do you set application icon for application made using Qt? Is there some easy way? It's a qmake-based project.

user_10239789 · Answer

To extend Rob's answer, you can set an application icon for macOS by adding and modifying the following line onto your .pro file.

macx: ICON = .icns

Note that the ICON qmake variable is only meant to target macOS.

For Windows, use

RC_ICONS = .ico if you're attaching a .ico file
or RC_FILE = .rc if you want to attach your icon through a .rc file. (Be sure to add IDI_ICON1 ICON DISCARDABLE "myappico.ico" into the rc file. Indentation not mine.)

user_7164926 · Answer

For Qt5 on Windows, move your ico file to project folder and add this line to your .pro file:

RC_ICONS = myappico.ico