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电梯直达

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发表于 2008-01-11 23:26 |只看该作者 |倒序浏览

问题主要有两个：
1：在ButtonWindow例中通过书中写的编译方式：
g++ -o button ButtonWindow.cpp -I$QTDIR/include －L$QTDIR/lib -lqt
总是会有以下错误提示：
/tmp/cc8kmfNl.o: In function `ButtonWindow::~ButtonWindow()':
ButtonWindow.cpp

.text+0x95): undefined reference to `vtable for ButtonWindow'
ButtonWindow.cpp

.text+0x9f): undefined reference to `vtable for ButtonWindow'
/tmp/cc8kmfNl.o: In function `ButtonWindow::~ButtonWindow()':
ButtonWindow.cpp

.text+0xd1): undefined reference to `vtable for ButtonWindow'
ButtonWindow.cpp

.text+0xdb): undefined reference to `vtable for ButtonWindow'
/tmp/cc8kmfNl.o: In function `ButtonWindow::~ButtonWindow()':
ButtonWindow.cpp

.text+0x10d): undefined reference to `vtable for ButtonWindow'
/tmp/cc8kmfNl.o:ButtonWindow.cpp

.text+0x117): more undefined references to `vtable for ButtonWindow' follow
collect2: ld returned 1 exit status

  2：于是我只好通过qmake编译，结果编译出来的程序  点击"click me" 按钮后在terminal中不会像书中提到的那样打印出："clicked" 字样！！

请问这是怎么回事，大家帮忙解决一下把！！！！！！

程序源码如下：

ButtonWindow.h:

#include<qmainwindow.h>

class ButtonWindow : public QMainWindow
{
Q_OBJECT

public:
      ButtonWindow(QWidget *parent = 0, const char *name = 0);
      virtual ~ButtonWindow();

private slots:
      void Clicked();
};

ButtonWindow.cpp：

#include"ButtonWindow.h"
#include<qpushbutton.h>
#include<qapplication.h>
#include<iostream.h>

ButtonWindow::ButtonWindow(QWidget *parent, const char *name) : QMainWindow(parent, name)
{
this->setCaption("This is the window Title"

;
QPushButton *button = new QPushButton("Click Me!", this, "stuff"

;
button->setGeometry(50, 30, 70, 20);
connect(button, SIGNAL(clicked()), this, SLOT(Clicked));
}

ButtonWindow::~ButtonWindow()
{
}

void ButtonWindow::Clicked(void)
{
cout<<"clicked!\n"; //为什么不会打印出来？？？
}

int main(int argc, char **argv)
{

QApplication app(argc, argv);
ButtonWindow *window = new ButtonWindow();

app.setMainWidget(window);
window->show();

return app.exec();
}