#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->OK_Button->setText(tr("OK"));
ui->lineEdit->setText("Naive");
// QObject::
connect(OK_Button,SIGNAL(clicked()),lineEdit,SLOT(btn_clicked()));
}
void MainWindow::btn_clicked()
{
QString str="Hello Earth";
ui->lineEdit->setText(str);
}
MainWindow::~MainWindow()
{
delete ui;
}
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include<QPushButton>
#include<QLineEdit>
#include<QString>
#include <QPushButton>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private:
Ui::MainWindow *ui;
QPushButton *OK_Button;
QLineEdit *lineEdit;
private slots:
void btn_clicked();
};
#endif // MAINWINDOW_H
编译运行后编译器给出QObject::connect: No such signal MainWindow::clicked() inxxxxxxxx的提示，请问该如何解决
