我写了这样一个简单的程序:点击按钮让lineedit显示字符。我把按钮链接到自己写的槽时实现不了显示字符的功能,但我把按钮连接到close()时却能成功关闭窗口。为什么呢?请教各位高手!我用的版本是(qt4.3.4,在winXP 下用VC6编译成功)
代码如下:
#include "QApplication"
#include "QWidget"
#include "ui_form.h"
#include "form.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Form form ;
form.show();
return app.exec();
}
#include "ui_form.h"
#include "QWidget"
class QPushButton;
class QLineEdit;
class Form : public QWidget,public Ui_Form
{
Q_OBJECT
public:
Form(QWidget *parent = 0);
public slots:
void on_lineEdit_list();
public:
Ui::Form ui;
};
Form::Form(QWidget *parent)
:QWidget(parent)
{
ui.setupUi(this);
connect(ui.okButton,SIGNAL(clicked()),ui.lineEdit,SLOT(on_lineEdit_list()));
}
void Form::on_lineEdit_list()
{
ui.lineEdit->setText("hello!");
}