我在编程使用了QFileDialog类.
我的源程序是
main.cpp:
#include <qapplication.h>
#include "form2.h"
int main(int argc,char **argv)
{
QApplication a(argc,argv);
MyMainWindow w;
a.setMainWidget(&w);
w.show();
return a.exec();
}
form2.h:
#include <qwidget.h>
#include <qfiledialog.h>
#include <qstring.h>
class MyMainWindow : public QWidget
{
Q_OBJECT
public:
MyMainWindow();
private:
QFileDialog *fd;
QString fileName;
};
form2.cpp:
#include "form2.h"
#include <qfiledialog.h>
MyMainWindow::MyMainWindow()
{
setGeometry(100,100,200,50);
fileName=fd->getOpenFileName("/","*.png");
}
结果出现一下错误:
g++ -c -pipe -DQWS -fno-exceptions -fno-rtti -Wall -W -O2 -DNO_DEBUG -I/friendly-arm/x86-qtopia/qt/include -o form2.o form2.cpp
form2.cpp: In constructor `MyMainWindow::MyMainWindow()':
form2.cpp:6: invalid use of undefined type `struct QFileDialog'
/friendly-arm/x86-qtopia/qt/include/qfiledialog.h:45: forward declaration of `
struct QFileDialog'
make: *** [form2.o] Error 1
请问错在哪?
如何修改?
