//头文件:
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void fnEmitsig();
signals:
void Doublesig(double);
public slots:
void fnShowslo(double dbl);
private:
Ui::MainWindow *ui;
};
//源代码:
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
connect(ui->pushButton,
SIGNAL(Doublesig(double)),
this,
SLOT(fnShowslo(double)));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::fnShowslo(double dbl)
{
QMessageBox::information(this,"1","1");
}
//想理解下自定义信号和槽,所以我自定义了一个信号和槽,但是在连接时无法没有找到?是不是我程序哪里写错了?
|