为QT生成的应用程序加图标

在QT帮助那里 查找 ：Setting the Application Icon

The application icon, typically displayed in the top-left corner of an application's top-level windows, is set by calling the QWindow::setWindowIcon() method.

In order to change the icon of the executable application file itself, as it is presented on the desktop (i.e., prior to application execution), it is necessary to employ another, platform-dependent technique.

Setting the Application Icon on Windows

First, create an ICO format bitmap file that contains the icon image. This can be done with e.g. Microsoft Visual C++: Select File|New, then select the File tab in the dialog that appears, and choose Icon. (Note that you do not need to load your application
into Visual C++; here we are only using the icon editor.)

Store the ICO file in your application's source code directory, for example, with the name myappico.ico. Then, create a text file called, say, myapp.rc in which you put a single line of text:

IDI_ICON1 ICON DISCARDABLE "myappico.ico"

Finally, assuming you are using qmake to generate your makefiles, add this line to your myapp.pro file:

RC_FILE = myapp.rc

Regenerate your makefile and your application. The .exe file will now be represented with your icon in Explorer.

If you do not use qmake, the necessary steps are: first, run the rc program on the .rc file, then link your application with the resulting .res file.

1. 将你ICO的name.ICO，name.rc 放到qt工程那里

2.修改pro文件，加入 RC_FILE = name.rc

3.重新编译,OK