问题
I am unable to open QT form file (*.ui) from a Visual Studio 2008 Qt project. I'm using Qt 4.5.0. I get the the following error:
The file test.ui cannot be opened with Qt 4 form editor. Try converting the file using uic.exe
回答1:
I had the same symptoms, and the solution was to remove the top line of the ui file (once open with a text editor)
Surprising that Qt does not support well formed xml...
Meilleures Salutations
回答2:
Are you sure that your *.ui file are in the qt4 format and not in the qt3 format ? If there have been created with qt3, ui.exe can convert them to qt4 !
Another reason could be the version of the qt-integration tool for visual studio 2008, Do you have the last version ? Can you open the *-ui file with Qt Designer ?
回答3:
Bingo! It worked, Thanks Antoine
Matthieu: remove the line
<?xml version="1.0" encoding="UTF-8"?>
来源：https://stackoverflow.com/questions/1109300/unable-to-open-qt-form-ui-files-from-visual-studio