qt小项目：表白窗口（窗口，信号与槽）

在小的时候，我们经常会看到程序员的表白链接或者表白软件，今天我们来用qt做一个简易版本，并复习一下窗口，信号与槽的操作

1.整体思路

在窗口中显示一个按钮，写着表白话语，然后两个按钮，yes和no，点no则该按钮就跑，点yes则出现约会话语，再点就关闭窗口

2.分布实现思路

表白按钮直接写，yes按钮要一个点击信号，槽的功能是出现约会话语按钮，no按钮则是根据随机数来改变按钮的位置

3.整体代码

可以给女朋友下一个qt creater然后复制过去，我的天好浪漫

pro

QT       += core gui
QMAKE_PROJECT_DEPTH = 0

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

FORMS += \
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

mainwindow.h 

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include<QPushButton>
#include<ctime>
QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
public slots:
    void changeq1();
    void changeq2();


private:
    Ui::MainWindow *ui;
public:
    QPushButton *q1;
    QPushButton*q2;

};
#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);
    q1=new QPushButton("yes",this);
    q1->setGeometry(300,200,50,50);
   q2=new QPushButton("no",this);
    q2->setGeometry(450,200,50,50);
   std::srand(std::time(nullptr));
    connect(q1, &QPushButton::clicked, this, &MainWindow::changeq1);
    connect(q2, &QPushButton::clicked, this, &MainWindow::changeq2);
}

void MainWindow::changeq1()
{

   QPushButton* q3=new QPushButton("have a dinner?",this);
    q3->setGeometry(250,500,300,100);
   q3->show();
    connect(q3, &QPushButton::clicked, this, &MainWindow::close);
}
void MainWindow:: changeq2()
{
    int x=std::rand()%100;
    int y=std::rand()%100;
    q2->setGeometry(x,y,50,50);
}
MainWindow::~MainWindow()
{
    delete ui;
}

main.cpp

#include "mainwindow.h"

#include <QApplication>
#include<QObject>
#include<QPushButton>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    QPushButton *q=new QPushButton("do you love me?",&w);
    q->setGeometry(300,300,200,100);
    w.show();
    return a.exec();
}