How to change the route in the *.h files ?

[MarekR22]

Do you mean path to header files?
If yes then add path to your pro file, like this:

INCLUDEPATH += path1 \
      path2 \
      path3

INCLUDEPATH += path1 \
      path2 \
      path3

To copy to clipboard, switch view to plain text mode 

[wter27]

in fact it doesn't work .the source code is like this

#include <taglib/taglib.h>

#include <taglib/taglib.h>

To copy to clipboard, switch view to plain text mode 

and the files route is like this

./taglib/include/taglib.h

./taglib/include/taglib.h

To copy to clipboard, switch view to plain text mode 

so how could make sure that the QT could recognize the <taglib/taglib.h> is the file of ./taglib/include/taglib.h

[high_flyer]

so how could make sure that the QT could recognize the <taglib/taglib.h> is the file of ./taglib/include/taglib.h

You change <taglib/taglib.h> to <taglib.h> and add the path to the include paths.