Qt学习笔记之QPushButton 按钮类

来源：互联网发布：语音录入软件编辑：程序博客网时间：2024/05/16 16:04

在窗体中创建按钮 A,点击按钮 A,改变文字为按钮 B。实例代码如下
mainwindow.h

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <QPushButton>namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();private:    Ui::MainWindow *ui;    QPushButton *pbt;   private slots:    void textButton();};#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.H"#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    pbt=new QPushButton("bt a",this);    pbt->setGeometry(QRect(50,50,120,120));    connect(pbt,SIGNAL(released()),this,SLOT(textButton()));}void MainWindow::textButton(){    pbt->setText("bt b");}MainWindow::~MainWindow(){    delete ui;}

main.cpp

#include "mainwindow.H"#include <QApplication>int main(int argc, char *argv[]){    QApplication a(argc, argv);    MainWindow w;    w.show();    return a.exec();}

这里写图片描述

阅读全文

0 0