Qt写基础贪吃蛇小项目

Miserables_

于 2024-09-24 19:55:01 发布

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CC 4.0 BY-SA版权

文章标签： qt 开发语言

本文链接：https://blog.youkuaiyun.com/Miserables_/article/details/142496875

一.项目演示

Greed

二.使用Qt_Creator创建项目名

1.选择Application,创建Qt Widgets Application

然后一直下一步创建完毕

2.渲染游戏大厅界面，如图所示

下方为gamehall.h 期中的paintEvent为虚函数可以进行重写，用于绘制界面

#ifndef GAMEHALL_H
#define GAMEHALL_H

#include <QWidget>
#include<QPainter>
QT_BEGIN_NAMESPACE
namespace Ui { class GameHall; }
QT_END_NAMESPACE
class GameHall : public QWidget
{
    Q_OBJECT
public:
    GameHall(QWidget *parent = nullptr);
    ~GameHall();
    //重写绘图事件
    void paintEvent(QPaintEvent *event);
private:
    Ui::GameHall *ui;
};
#endif // GAMEHALL_H

绘制界面时可以创建qrc资源文件如下步骤

将准备好的资源复制粘贴到项目文件中就可以进行使用更方便一些了

gamehall.cpp中为窗口设置大小，设置标题，以及图标创建画家实例化，实例绘图，画家记性绘制页面

GameHall::GameHall(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::GameHall)
{
    ui->setupUi(this);
    //设置窗口大小
    this->setFixedSize(1000,800);
    //设置窗口标题
    this->setWindowTitle("贪吃蛇");
    //设置窗口图标
    this->setWindowIcon(QIcon(":/ico.png"));

    //设置字体 大小
    QFont font("微软雅黑",24);

}

void GameHall::paintEvent(QPaintEvent *event)
{
    //实例化画家
    QPainter painter(this);
    //QPixmap  实例化绘图设备
    QPixmap pix(":/game_hall.png");
    //绘画
    painter.drawPixmap(0,0,this->width(),this->height(),pix);
}

此时运行一下页面为

因为我们是设置点击有声音效果的打开API 后QSound需要添加multimedia

3.先添加qmke声音配置

配置完成以后就可以使用QSound 声音效果了

4.添加开始按钮

效果如下

代码如下

//开始游戏按钮
    QPushButton*strBtn=new QPushButton(this);
    strBtn->setFont(font);
    strBtn->setText("开始游戏");//设置开始文字
    strBtn->move(430,530);
    //取消开始游戏的边框
    strBtn->setStyleSheet("QPushButton{border:0px;}");

    QPushButton*exitButton=new QPushButton(this);
    exitButton->setText("退出游戏");
    exitButton->move(430,650);
    exitButton->setFont(font);
    // 去除边框
    exitButton->setStyleSheet("QPushButton{border:0px;}");

5.给开始按钮，退出按钮设置信号槽

开始按钮时我们要跳转到另一个页面，需要新建c++ class类

开始退出按钮代码如下

 GameSelect*gameSelect=new GameSelect;
    connect(strBtn,&QPushButton::clicked,[=](){
        this->close();
        //设置第二个窗口和第一个大小一样
        gameSelect->setGeometry(this->geometry());
        gameSelect->show();
        QSound::play(":clicked.wav");
    });
    //退出游戏
    connect(exitButton,&QPushButton::clicked,[=](){
        this->close();
    });

点击开始按钮就会跳转到新的页面，点击退出游戏时就关闭游戏，下图是点击开始游戏初始页面

三.绘制游戏开始选项页面

1.gameselect.h页面代码

#ifndef GAMESELECT_H
#define GAMESELECT_H

#include <QWidget>
#include<QPainter>
class GameSelect : public QWidget
{
    Q_OBJECT
public:
    explicit GameSelect(QWidget *parent = nullptr);

    void paintEvent(QPaintEvent *event);
signals:

};

#endif // GAMESELECT_H

同gamehall.h 我们绘制页面需要用到paintEvent

2.gamehall.cpp 中 painEvent代码

void GameSelect::paintEvent(QPaintEvent *event)
{
    //实例化画家
    QPainter painter(this);
    //QPixmaap  实例化绘图设备
    QPixmap pix(":/game_select.png");
    painter.drawPixmap(0,0,this->width(),this->height(),pix);
}

3.设置页面的标题，大小，图标，以及添加各类按钮

//创建返回按钮
    QPushButton*backButton=new QPushButton(this);
    //设置返回按钮图标
    backButton->setIcon(QIcon(":/back.png"));
    //设置返回按钮位置
    backButton->move(900,720);

    QFont font("微软雅黑",23);
    
    QPushButton*simpleButton=new QPushButton(this);
    simpleButton->setText("简单模式");
    simpleButton->setFont(font);
    simpleButton->move(400,150);


    QPushButton*normalButton=new QPushButton(this);
    normalButton->setText("正常模式");
    normalButton->setFont(font);
    normalButton->move(400,300);

    QPushButton*hardButton=new QPushButton(this);
    hardButton->setText("困难模式");
    hardButton->setFont(font);
    hardButton->move(400,500);

    QPushButton*historyButton=new QPushButton(this);
    historyButton->setText("历史战绩");
    historyButton->setFont(font);
    historyButton->move(400,700);

4.目前运行程序如图所示

5.给右下角返回按钮添加信号槽机制，点击就返回第一个页面

    connect(backButton,&QPushButton::clicked,[=](){

        this->close();

        QSound::play(":/clicked.wav");
        GameHall*gamehall=new GameHall();
        gamehall->show();

    });

6.创建第三个页面游戏房间页面，当点击模式后进入房间

四.绘制游戏房间

1.gameroom.h代码如下

#ifndef GAMEROOM_H
#define GAMEROOM_H
#include<QPainter>
#include <QObject>
#include <QWidget>
#include<QTimer>
#include<QList>
#include<QSound>
enum class SnakeDirect{//枚举设置蛇的方向
    UP=0,
    DOWN,
    LEFT,
    RIGHT
};

class GameRoom : public QWidget
{
    Q_OBJECT
public:
    explicit GameRoom(QWidget *parent = nullptr);
    void paintEvent(QPaintEvent *event);//重新绘画事件
    void moveup();//向上移动
    void moveDown();//蛇向下移动
    void moveLeft();//向左移动
    void moveRight();//向右移动
    bool checkFail();//判断游戏是否结束
    void createNewFood();//食物创建
    void setTimeOut(int timeout){
        moveTimeOut=timeout;
    }
signals:
private:
    const int KSnakeNodeWidth=20;//表示蛇身体节点的宽度
    const int kSnakeNodeHeight=20;//表示蛇身体节点的高度
    const int KDefaultTimeout=200;//蛇默认移动速度
    QList<QRectF>snakeList;
    QRectF foodRect;//表示食物节点
    SnakeDirect moveDirect=SnakeDirect::UP;//设置蛇的默认方向上
    QTimer*timer;//定时器
    QSound *sound;
    bool isGameStart=false;//表示是否可以开始游戏
    int moveTimeOut=KDefaultTimeout;

};
#endif // GAMEROOM_H

1.首先设置大小，窗口标题，设置划分区域，渲染游戏页面

void GameRoom::paintEvent(QPaintEvent *event)
{
    //实例化画家
    QPainter painter(this);
    
    //QPixmap
    QPixmap pix;
    
    pix.load(":/heiwukong.png");
    painter.drawPixmap(0,0,800,800,pix);
    
    pix.load(":/bg1.png");
    painter.drawPixmap(800,0,200,900,pix);}

GameRoom::GameRoom(QWidget *parent) : QWidget(parent)
{
    this->setWindowTitle("游戏页面");//设置标题
    this->setWindowIcon(QIcon(":/ico.png"));//设置图标
    this->setFixedSize(1000,800);}

2.向上移动的实现

void GameRoom::moveup()
{
    QPointF leftTop;//左上角坐标
    QPointF rightBottom;//右下角坐标
    auto snakeNode=snakeList.front();//头
    int headX=snakeNode.x();
    int headY=snakeNode.y();
    if(headY<0)//穿墙
    {
        leftTop=QPointF(headX,this->height()-kSnakeNodeHeight);
        
    }else//无穿墙
    {
        leftTop=QPointF(headX,headY-kSnakeNodeHeight);
    }
    rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);
    
    snakeList.push_front(QRectF(leftTop,rightBottom));//节点更新到链表中
  
    //snakeList.push_back(QRectF(leftTop,rightBottom));
}

3.向下移动的实现

void GameRoom::moveDown()
{
    QPointF leftTop;
    QPointF rightBottom;
    auto snakeNode=snakeList.front();
    int headX=snakeNode.x();
    int headY=snakeNode.y();
    if(headY>this->height())
    {
        leftTop=QPointF(headX,0);
    }else
    {
        leftTop=snakeNode.bottomLeft();
        
    }
    rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);
    snakeList.push_front(QRectF(leftTop,rightBottom));
}

4.向左移动的实现

void GameRoom::moveLeft()
{
    QPointF leftTop;
    QPointF rightBottom;
    
    auto snakeNode=snakeList.front();
    
    int headX=snakeNode.x();
    int headY=snakeNode.y();
    
    if(headX<0)
    {
        leftTop=QPointF(800-KSnakeNodeWidth,headY);
    }else
    {
        leftTop=QPointF(headX-KSnakeNodeWidth,headY);
    }
    rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);
    snakeList.push_front(QRectF(leftTop,rightBottom));
}

5.向右移动的实现

void GameRoom::moveRight()
{
    QPointF leftTop;//左上角坐标
    QPointF rightBottom;//右下角坐标
    auto snakeNode=snakeList.front();
    int headX=snakeNode.x();
    int headY=snakeNode.y();
    if(headX+KSnakeNodeWidth>780)
    {
        
        leftTop=QPointF(0,headY);
    }else
    {
       
        leftTop=snakeNode.topRight();
    }
    
    rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);
    snakeList.push_front(QRectF(leftTop,rightBottom));
}

6.判断游戏是否结束

当蛇身之间互相碰撞时，即蛇身上的节点重合时游戏结束

bool GameRoom::checkFail()
{
    for(int i=0;i<snakeList.size();i++)
    {
        for(int j=i+1;j<snakeList.size();j++)
        {
            //获取两个节点的位置 如果相同为true结束游戏
            if(snakeList.at(i)==snakeList.at(j))
            {
                return true;
            }
        }
    }
    return false;
}

7.渲染贪吃蛇

 //加载蛇头的资源文件

    if(moveDirect==SnakeDirect::UP)
    {
        pix.load(":/up.png");
    }else if(moveDirect==SnakeDirect::DOWN)
    {
        pix.load(":/down.png");
    }else if(moveDirect==SnakeDirect::LEFT)
    {
        pix.load(":/left.png");
    }else if(moveDirect==SnakeDirect::RIGHT)
    {
        pix.load(":/right.png");
    }
    auto snakeHead=snakeList.front();//获取蛇头节点
    painter.drawPixmap(snakeHead.x(),snakeHead.y(),snakeHead.width(),snakeHead.height(),pix);

    //绘制蛇身
    pix.load(":/Bd.png");
    for(int i=1;i<snakeList.size()-1;i++)
    {
        auto node=snakeList.at(i);
        painter.drawPixmap(node.x(),node.y(),node.width(),node.height(),pix);

    }
    //绘制蛇的尾巴
    auto snakeTaile=snakeList.back();
    painter.drawPixmap(snakeTaile.x(),snakeTaile.y(),snakeTaile.width(),snakeTaile.height(),pix);

8.初始化贪吃蛇

在GameRoom::GameRoom(QWidget *parent) : QWidget(parent)中

  //初始化贪吃蛇
    snakeList.push_back(QRectF(this->width()*0.5,(this->height()/2),KSnakeNodeWidth,kSnakeNodeHeight));
    moveup();
    moveup();

9.渲染食物

void GameRoom::createNewFood()
{
    
    foodRect=QRectF(qrand()%(800/KSnakeNodeWidth)*KSnakeNodeWidth,
                    qrand()%(this->height()/kSnakeNodeHeight)*kSnakeNodeHeight,
                    KSnakeNodeWidth,
                    kSnakeNodeHeight);
    
}

10.当吃上食物时增添一个节点并删除最后节点

 //创建食物
    createNewFood();
    
    timer=new QTimer(this);
    connect(timer,&QTimer::timeout,[=](){
        
        int cnt=1;
        if(snakeList.front().intersects(foodRect))//判断两个矩形 食物和蛇头会不会相交
        {
            createNewFood();
            cnt++;//统计相交的次数
            QSound::play(":/eatfood.wav");
        }
        while(cnt--)
        {
            switch(moveDirect)
            {
            case SnakeDirect::UP:
                moveup();
                break;
            case SnakeDirect::DOWN:
                moveDown();
                break;
            case SnakeDirect::LEFT:
                moveLeft();
                break;
            case SnakeDirect::RIGHT:
                moveRight();
                break;
            }
        }
        snakeList.pop_back();//删除最后一个节点
        update();//更新链表
    });

11.设置开始和停止按钮

QPushButton*startButton=new QPushButton(this);
    QPushButton*stopButton=new QPushButton(this);
    startButton->move(860,150);
    startButton->setText("开始");
    stopButton->move(860,240);
    stopButton->setText("停止");
    //startButton->setStyleSheet("QPushButton{border:0px}");
    //stopButton->setStyleSheet("QPushButton{border:0px}");
    QFont font("微软雅黑",20);
    startButton->setFont(font);
    stopButton->setFont(font);
    sound=new QSound(":/taicongming.wav");
    connect(startButton,&QPushButton::clicked,[=](){
        isGameStart=true;
        timer->start(moveTimeOut);
        sound->play();
        sound->setLoops(-1);//为真一直播放
    });
    
    //停止
    connect(stopButton,&QPushButton::clicked,[=](){
        isGameStart=false;
        timer->stop();
        sound->stop();
    });

12.设置四个方向按钮控制蛇的移动

 //方向控制
    QPushButton*up=new QPushButton(this);
    QPushButton*down=new QPushButton(this);
    QPushButton*left=new QPushButton(this);
    QPushButton*right=new QPushButton(this);
    
    up->move(880,400);
    down->move(880,500);
    left->move(840,450);
    right->move(920,450);
    
    up->setText("↑");
    down->setText("↓");
    left->setText("←");
    right->setText("→");
    
    up->setStyleSheet("QPushButton{border:0px}");
    down->setStyleSheet("QPushButton{border:0px}");
    left->setStyleSheet("QPushButton{border:0px}");
    right->setStyleSheet("QPushButton{border:0px}");
    
    QFont ft("黑体",35);
    up->setFont(ft);
    down->setFont(ft);
    left->setFont(ft);
    right->setFont(ft);
    //规定上箭头
    connect(up,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::DOWN)
        {
            moveDirect=SnakeDirect::UP;
        }
    });
    
    //规定下箭头
    connect(down,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::UP)
        {
            moveDirect=SnakeDirect::DOWN;
        }
    });
    //规定左箭头
    connect(left,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::RIGHT)
        {
            moveDirect=SnakeDirect::LEFT;
        }
    });
    //规定右箭头
    connect(right,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::LEFT)
        {
            moveDirect=SnakeDirect::RIGHT;
        }
    });

13.设置退出游戏按钮，弹出消息框

//设置退出按钮
    QPushButton*exitButton=new QPushButton(this);
    exitButton->setText("退出游戏");
    exitButton->setFont(font);
    
    exitButton->move(830,700);
    //设置消息弹出框
    QMessageBox*messageBox=new QMessageBox(this);
    
    QPushButton*ok=new QPushButton("ok");
    QPushButton*cancel=new QPushButton("cancel");
    
    //按钮添加到消息盒子
    messageBox->addButton(ok,QMessageBox::AcceptRole);
    messageBox->addButton(cancel,QMessageBox::RejectRole);
    messageBox->setWindowTitle("退出游戏");
    messageBox->setText("确认退出游戏吗？？？？？");
    connect(exitButton,&QPushButton::clicked,[=](){
        isGameStart=false;
        timer->stop();
        sound->stop();
        
        messageBox->show();
        messageBox->exec();//事件轮询
        QSound::play(":/clicked.wav");
        
        GameSelect*select=new GameSelect;
        if(messageBox->clickedButton()==ok)
        {
            this->close();
            
            select->show();
        }else
        {
            messageBox->close();
        }
    });

如图所示

14.渲染积分以及失败效果

 //绘制分数
    pix.load(":/sorce_bg.png");
    painter.drawPixmap(this->width()*0.85,this->height()*0.06,90,40,pix);
    //画笔
    QPen pen;
    pen.setColor(Qt::black);
    painter.setPen(pen);
    QFont font("方正舒体",22);
    painter.setFont(font);
    painter.drawText(this->width()*0.9,this->height()*0.1,QString("%1").arg(snakeList.size()));
    //往文件里面写入分数
    int score=snakeList.size();
    QFile file("D:/SSNNake/1.txt");
    if(file.open(QIODevice::WriteOnly|QIODevice::Text))//判断是否打开了
    {
        QTextStream out(&file);
        int num=score;
        out<<num;
        file.close();
    }
    //渲染绘制失败效果
    if(checkFail())
    {
        pen.setColor(Qt::red);
        painter.setPen(pen);
        QFont font1("方正舒体",50);
        painter.setFont(font1);
        painter.drawText(this->width()*0.25,this->height()*0.5,
                         QString("GAME OVEER!"));
        timer->stop();
        sound->stop();
        int count=1;
        while(count--)
        {
            QSound::play(":/nizaibuzai.wav");
        }
    }

15.设置三种不同的模式难度

回到gameselect.cpp中

 connect(simpleButton,&QPushButton::clicked,[this](){
        this->close();
        GameRoom *gameroom=new GameRoom;
        gameroom->show();
        gameroom->setGeometry(this->geometry());
        QSound::play(":/clicked.wav");
        gameroom->setTimeOut(350);
    });


    connect(normalButton,&QPushButton::clicked,[=](){
        this->close();
        GameRoom *gameroom=new GameRoom;
        gameroom->show();
        gameroom->setGeometry(this->geometry());
        QSound::play(":/clicked.wav");
        gameroom->setTimeOut(300);
    });
    connect(hardButton,&QPushButton::clicked,[=](){
        this->close();
        GameRoom *gameroom=new GameRoom;
        gameroom->show();
        gameroom->setGeometry(this->geometry());
        QSound::play(":/clicked.wav");
        gameroom->setTimeOut(200);
    });

16.网文件写入历史战绩，并打开文件获取历史战绩

connect(historyButton,&QPushButton::clicked,[=](){
        QWidget*widget=new QWidget();
        widget->setWindowTitle("历史战绩");
        //设置窗口大小
        widget->setFixedSize(500,300);
        QTextEdit*edit=new QTextEdit(widget);
        edit->setFont(font);
        edit->setFixedSize(500,300);
        QFile file("D:/SSNNake/1.txt");
        file.open(QIODevice::ReadOnly);
        QTextStream in(&file);
        //读取历史战绩 将读出的字符串转化成int
        // int data=in.readLine().toInt();
        //追加历史战绩 将 int类型转化成 字符串String
        // edit->append(QString::number(data));
        edit->append("得分为：");
        edit->append(in.readLine());
        widget->show();
    });

写入历史战绩

 //往文件里面写入分数
    int score=snakeList.size();
    QFile file("D:/SSNNake/1.txt");
    if(file.open(QIODevice::WriteOnly|QIODevice::Text))//判断是否打开了
    {
        QTextStream out(&file);
        int num=score;
        out<<num;
        file.close();
    }

五.全部代码

gamehall.h

#ifndef GAMEHALL_H
#define GAMEHALL_H

#include <QWidget>
#include<QPainter>
QT_BEGIN_NAMESPACE
namespace Ui { class GameHall; }
QT_END_NAMESPACE
class GameHall : public QWidget
{
    Q_OBJECT
public:
    GameHall(QWidget *parent = nullptr);
    ~GameHall();
    //重写绘图事件
    void paintEvent(QPaintEvent *event);
private:
    Ui::GameHall *ui;
};
#endif // GAMEHALL_H

gamehall.cpp

#include "gamehall.h"
#include "ui_gamehall.h"
#include<QPixmap>
#include<QPainter>
#include<QIcon>
#include<gameselect.h>
#include<QPushButton>
#include<QLabel>
#include<QFont>
#include<QSound>
GameHall::GameHall(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::GameHall)
{
    ui->setupUi(this);
    //设置窗口大小
    this->setFixedSize(1000,800);
    //设置窗口标题
    this->setWindowTitle("贪吃蛇");
    //设置窗口图标
    this->setWindowIcon(QIcon(":/ico.png"));

    //设置字体 大小
    QFont font("微软雅黑",24);
    //开始游戏按钮
    QPushButton*strBtn=new QPushButton(this);


    strBtn->setFont(font);
    strBtn->setText("开始游戏");//设置开始文字

    strBtn->move(430,530);
    //取消开始游戏的边框
    strBtn->setStyleSheet("QPushButton{border:0px;}");

    //跳转到第二个窗口
    GameSelect*gameSelect=new GameSelect;
    connect(strBtn,&QPushButton::clicked,[=](){
        this->close();
        //设置第二个窗口和第一个大小一样
      //  gameSelect->setGeometry(this->geometry());
        gameSelect->show();

        QSound::play(":clicked.wav");


    });

    //退出游戏
    QPushButton*exitButton=new QPushButton(this);

    exitButton->setText("退出游戏");

    exitButton->move(430,650);
    exitButton->setFont(font);

    // 去除边框
    exitButton->setStyleSheet("QPushButton{border:0px;}");
    connect(exitButton,&QPushButton::clicked,[=](){
        //关闭是没有声音的
       //QSound::play(":clicked.wav");
      this->close();

    });
}

GameHall::~GameHall()
{
    delete ui;
}

void GameHall::paintEvent(QPaintEvent *event)
{
    //实例化画家
    QPainter painter(this);
    //QPixmap  实例化绘图设备
    QPixmap pix(":/game_hall.png");
    //绘画
    painter.drawPixmap(0,0,this->width(),this->height(),pix);
}

gameselect.h

#ifndef GAMESELECT_H
#define GAMESELECT_H

#include <QWidget>
#include<QPainter>
class GameSelect : public QWidget
{
    Q_OBJECT
public:
    explicit GameSelect(QWidget *parent = nullptr);

    void paintEvent(QPaintEvent *event);
signals:

};

#endif // GAMESELECT_H

gameselect .cpp

#include "gameselect.h"
#include"gamehall.h"
#include<QIcon>
#include<QPushButton>
#include<QSound>
#include<QPixmap>
#include<QFont>
#include"gameroom.h"
#include<QTextEdit>
#include<QFile>
#include<QTextStream>
GameSelect::GameSelect(QWidget *parent) : QWidget(parent)
{

    //设置窗口大小
    this->setFixedSize(1000,800);
    //设置窗口标题
    this->setWindowTitle("游戏选择关卡");
    //设置窗口图标
    this->setWindowIcon(QIcon(":/ico.png"));

    //创建返回按钮
    QPushButton*backButton=new QPushButton(this);
    //设置返回按钮图标
    backButton->setIcon(QIcon(":/back.png"));
    //设置返回按钮位置
    backButton->move(900,720);

    connect(backButton,&QPushButton::clicked,[=](){

        this->close();

        QSound::play(":/clicked.wav");
        GameHall*gamehall=new GameHall();
        gamehall->show();

    });
    QFont font("微软雅黑",23);


    QPushButton*simpleButton=new QPushButton(this);
    simpleButton->setText("简单模式");
    simpleButton->setFont(font);
    simpleButton->move(400,150);


    QPushButton*normalButton=new QPushButton(this);
    normalButton->setText("正常模式");
    normalButton->setFont(font);
    normalButton->move(400,300);

    QPushButton*hardButton=new QPushButton(this);
    hardButton->setText("困难模式");
    hardButton->setFont(font);
    hardButton->move(400,500);

    connect(simpleButton,&QPushButton::clicked,[this](){
        this->close();
        GameRoom *gameroom=new GameRoom;
        gameroom->show();
        gameroom->setGeometry(this->geometry());
        QSound::play(":/clicked.wav");
        gameroom->setTimeOut(350);
    });


    connect(normalButton,&QPushButton::clicked,[=](){
        this->close();
        GameRoom *gameroom=new GameRoom;
        gameroom->show();
        gameroom->setGeometry(this->geometry());
        QSound::play(":/clicked.wav");
        gameroom->setTimeOut(300);
    });
    connect(hardButton,&QPushButton::clicked,[=](){
        this->close();
        GameRoom *gameroom=new GameRoom;
        gameroom->show();
        gameroom->setGeometry(this->geometry());
        QSound::play(":/clicked.wav");
        gameroom->setTimeOut(200);
    });

    QPushButton*historyButton=new QPushButton(this);
    historyButton->setText("历史战绩");
    historyButton->setFont(font);
    historyButton->move(400,700);

    connect(historyButton,&QPushButton::clicked,[=](){
        QWidget*widget=new QWidget();
        widget->setWindowTitle("历史战绩");
        //设置窗口大小
        widget->setFixedSize(500,300);

        QTextEdit*edit=new QTextEdit(widget);
        edit->setFont(font);
        edit->setFixedSize(500,300);
        QFile file("D:/SSNNake/1.txt");
        file.open(QIODevice::ReadOnly);

        QTextStream in(&file);
        //读取历史战绩 将读出的字符串转化成int
        // int data=in.readLine().toInt();
        //追加历史战绩 将 int类型转化成 字符串String
        // edit->append(QString::number(data));
        edit->append("得分为：");
        edit->append(in.readLine());
        widget->show();
    });
}


void GameSelect::paintEvent(QPaintEvent *event)
{
    //实例化画家
    QPainter painter(this);
    //QPixmaap  实例化绘图设备
    //QPixmap pix(":/game_select.png");
   QPixmap pix(":/danzai.png");
    painter.drawPixmap(0,0,this->width(),this->height(),pix);
}

gameroom.h

#ifndef GAMEROOM_H
#define GAMEROOM_H
#include<QPainter>
#include <QObject>
#include <QWidget>
#include<QTimer>
#include<QList>
#include<QSound>
enum class SnakeDirect{//枚举设置蛇的方向
    UP=0,
    DOWN,
    LEFT,
    RIGHT
};

class GameRoom : public QWidget
{
    Q_OBJECT
public:
    explicit GameRoom(QWidget *parent = nullptr);

    void paintEvent(QPaintEvent *event);//重新绘画事件
    void moveup();//向上移动
    void moveDown();//蛇向下移动
    void moveLeft();//向左移动
    void moveRight();//向右移动

    bool checkFail();//判断游戏是否结束
    void createNewFood();//食物创建
    void setTimeOut(int timeout){
        moveTimeOut=timeout;
    }
signals:

private:
    const int KSnakeNodeWidth=20;//表示蛇身体节点的宽度
    const int kSnakeNodeHeight=20;//表示蛇身体节点的高度
    const int KDefaultTimeout=200;//蛇默认移动速度

    QList<QRectF>snakeList;

    QRectF foodRect;//表示食物节点
    SnakeDirect moveDirect=SnakeDirect::UP;//设置蛇的默认方向上
    QTimer*timer;//定时器
    QSound *sound;
    bool isGameStart=false;//表示是否可以开始游戏
    int moveTimeOut=KDefaultTimeout;

};

#endif // GAMEROOM_H

gameroom.cpp

#include "gameroom.h"
#include<QIcon>
#include<QPixmap>
#include<QTimer>
#include<QPushButton>
#include<QFont>
#include<QSound>
#include<QMessageBox>
#include<QFile>
#include<QTextStream>
#include"gameselect.h"
GameRoom::GameRoom(QWidget *parent) : QWidget(parent)
{
    this->setWindowTitle("游戏页面");//设置标题
    this->setWindowIcon(QIcon(":/ico.png"));//设置图标
    this->setFixedSize(1000,800);
    //初始化贪吃蛇
    snakeList.push_back(QRectF(this->width()*0.5,(this->height()/2),KSnakeNodeWidth,kSnakeNodeHeight));
    moveup();
    moveup();

    //创建食物
    createNewFood();

    timer=new QTimer(this);
    connect(timer,&QTimer::timeout,[=](){

        int cnt=1;
        if(snakeList.front().intersects(foodRect))//判断两个矩形 食物和蛇头会不会相交
        {
            createNewFood();
            cnt++;//统计相交的次数
            QSound::play(":/eatfood.wav");
        }
        while(cnt--)
        {
            switch(moveDirect)
            {
            case SnakeDirect::UP:
                moveup();
                break;
            case SnakeDirect::DOWN:
                moveDown();
                break;
            case SnakeDirect::LEFT:
                moveLeft();
                break;
            case SnakeDirect::RIGHT:
                moveRight();
                break;
            }
        }
        snakeList.pop_back();//删除最后一个节点
        update();//更新链表
    });


    QPushButton*startButton=new QPushButton(this);
    QPushButton*stopButton=new QPushButton(this);
    startButton->move(860,150);
    startButton->setText("开始");

    stopButton->move(860,240);
    stopButton->setText("停止");
    //startButton->setStyleSheet("QPushButton{border:0px}");
    //stopButton->setStyleSheet("QPushButton{border:0px}");
    QFont font("微软雅黑",20);
    startButton->setFont(font);
    stopButton->setFont(font);
    sound=new QSound(":/taicongming.wav");
    connect(startButton,&QPushButton::clicked,[=](){
        isGameStart=true;
        timer->start(moveTimeOut);

        sound->play();
        sound->setLoops(-1);//为真一直播放
    });

    //停止
    connect(stopButton,&QPushButton::clicked,[=](){
        isGameStart=false;
        timer->stop();
        sound->stop();
    });
    //方向控制
    QPushButton*up=new QPushButton(this);
    QPushButton*down=new QPushButton(this);
    QPushButton*left=new QPushButton(this);
    QPushButton*right=new QPushButton(this);

    up->move(880,400);
    down->move(880,500);
    left->move(840,450);
    right->move(920,450);

    up->setText("↑");
    down->setText("↓");
    left->setText("←");
    right->setText("→");

    up->setStyleSheet("QPushButton{border:0px}");
    down->setStyleSheet("QPushButton{border:0px}");
    left->setStyleSheet("QPushButton{border:0px}");
    right->setStyleSheet("QPushButton{border:0px}");

    QFont ft("黑体",35);
    up->setFont(ft);
    down->setFont(ft);
    left->setFont(ft);
    right->setFont(ft);
    //规定上箭头
    connect(up,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::DOWN)
        {
            moveDirect=SnakeDirect::UP;
        }
    });

    //规定下箭头
    connect(down,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::UP)
        {
            moveDirect=SnakeDirect::DOWN;
        }
    });
    //规定左箭头
    connect(left,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::RIGHT)
        {
            moveDirect=SnakeDirect::LEFT;
        }
    });
    //规定右箭头
    connect(right,&QPushButton::clicked,[=](){
        if(moveDirect!=SnakeDirect::LEFT)
        {
            moveDirect=SnakeDirect::RIGHT;
        }
    });

    //设置退出按钮
    QPushButton*exitButton=new QPushButton(this);
    exitButton->setText("退出游戏");
    exitButton->setFont(font);

    exitButton->move(830,700);
    //设置消息弹出框
    QMessageBox*messageBox=new QMessageBox(this);

    QPushButton*ok=new QPushButton("ok");
    QPushButton*cancel=new QPushButton("cancel");

    //按钮添加到消息盒子
    messageBox->addButton(ok,QMessageBox::AcceptRole);
    messageBox->addButton(cancel,QMessageBox::RejectRole);
    messageBox->setWindowTitle("退出游戏");
    messageBox->setText("确认退出游戏吗？？？？？");
    connect(exitButton,&QPushButton::clicked,[=](){
        isGameStart=false;
        timer->stop();
        sound->stop();

        messageBox->show();
        messageBox->exec();//事件轮询
        QSound::play(":/clicked.wav");

        GameSelect*select=new GameSelect;
        if(messageBox->clickedButton()==ok)
        {
            this->close();

            select->show();
        }else
        {
            messageBox->close();
        }
    });



}

void GameRoom::paintEvent(QPaintEvent *event)
{
    //实例化画家
    QPainter painter(this);

    //QPixmap
    QPixmap pix;

    pix.load(":/heiwukong.png");
    painter.drawPixmap(0,0,800,800,pix);

    pix.load(":/bg1.png");
    painter.drawPixmap(800,0,200,900,pix);
    //加载蛇头的资源文件

    if(moveDirect==SnakeDirect::UP)
    {
        pix.load(":/up.png");
    }else if(moveDirect==SnakeDirect::DOWN)
    {
        pix.load(":/down.png");
    }else if(moveDirect==SnakeDirect::LEFT)
    {
        pix.load(":/left.png");
    }else if(moveDirect==SnakeDirect::RIGHT)
    {
        pix.load(":/right.png");
    }
    auto snakeHead=snakeList.front();//获取蛇头节点
    painter.drawPixmap(snakeHead.x(),snakeHead.y(),snakeHead.width(),snakeHead.height(),pix);


    //绘制蛇身
    pix.load(":/Bd.png");
    for(int i=1;i<snakeList.size()-1;i++)
    {
        auto node=snakeList.at(i);
        painter.drawPixmap(node.x(),node.y(),node.width(),node.height(),pix);

    }
    //个人感觉无所谓这一点
    //绘制蛇的尾巴
    auto snakeTaile=snakeList.back();
    painter.drawPixmap(snakeTaile.x(),snakeTaile.y(),snakeTaile.width(),snakeTaile.height(),pix);


    //绘制食物
    pix.load(":/food.bmp");
    painter.drawPixmap(foodRect.x(),foodRect.y(),foodRect.width(),foodRect.height(),pix);

    //绘制分数
    pix.load(":/sorce_bg.png");
    painter.drawPixmap(this->width()*0.85,this->height()*0.06,90,40,pix);


    //画笔
    QPen pen;
    pen.setColor(Qt::black);
    painter.setPen(pen);
    QFont font("方正舒体",22);
    painter.setFont(font);
    painter.drawText(this->width()*0.9,this->height()*0.1,QString("%1").arg(snakeList.size()));

    //往文件里面写入分数
    int score=snakeList.size();
    QFile file("D:/SSNNake/1.txt");
    if(file.open(QIODevice::WriteOnly|QIODevice::Text))//判断是否打开了
    {
        QTextStream out(&file);
        int num=score;
        out<<num;
        file.close();
    }

    //渲染绘制失败效果
    if(checkFail())
    {
        pen.setColor(Qt::red);
        painter.setPen(pen);
        QFont font1("方正舒体",50);
        painter.setFont(font1);
        painter.drawText(this->width()*0.25,this->height()*0.5,
                         QString("GAME OVEER!"));
        timer->stop();
        sound->stop();
        int count=1;
        while(count--)
        {
            QSound::play(":/nizaibuzai.wav");
        }


    }

}

void GameRoom::moveup()
{
    QPointF leftTop;//左上角坐标
    QPointF rightBottom;//右下角坐标
    auto snakeNode=snakeList.front();//头
    int headX=snakeNode.x();
    int headY=snakeNode.y();
    if(headY<0)//穿墙了
    {
        leftTop=QPointF(headX,this->height()-kSnakeNodeHeight);

    }else//无穿墙
    {
        leftTop=QPointF(headX,headY-kSnakeNodeHeight);
    }
    rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);

    snakeList.push_front(QRectF(leftTop,rightBottom));//节点更新到链表中

    //snakeList.push_back(QRectF(leftTop,rightBottom));

}

void GameRoom::moveDown()
{
   QPointF leftTop;
   QPointF rightBottom;
   auto snakeNode=snakeList.front();
   int headX=snakeNode.x();
   int headY=snakeNode.y();
   if(headY>this->height())
   {
       leftTop=QPointF(headX,0);
   }else
   {
       leftTop=snakeNode.bottomLeft();

   }
   rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);
   snakeList.push_front(QRectF(leftTop,rightBottom));
}

void GameRoom::moveLeft()
{
    QPointF leftTop;
    QPointF rightBottom;

    auto snakeNode=snakeList.front();

    int headX=snakeNode.x();
    int headY=snakeNode.y();

    if(headX<0)
    {
        leftTop=QPointF(800-KSnakeNodeWidth,headY);
    }else
    {
        leftTop=QPointF(headX-KSnakeNodeWidth,headY);
    }
    rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);
    snakeList.push_front(QRectF(leftTop,rightBottom));
}

void GameRoom::moveRight()
{
    QPointF leftTop;//左上角坐标
    QPointF rightBottom;//右下角坐标
    auto snakeNode=snakeList.front();
    int headX=snakeNode.x();
    int headY=snakeNode.y();
    if(headX+KSnakeNodeWidth>780)
    {
        //我理解的
        //leftTop=QPointF(KSnakeNodeWidth,headY);
        //他写的
        leftTop=QPointF(0,headY);
    }else
    {
        //我理解的
        //leftTop=QPointF(KSnakeNodeWidth+headX,headY);

        //他写的
        leftTop=snakeNode.topRight();
    }

    rightBottom=leftTop+QPointF(KSnakeNodeWidth,kSnakeNodeHeight);
    snakeList.push_front(QRectF(leftTop,rightBottom));
}

bool GameRoom::checkFail()
{
    for(int i=0;i<snakeList.size();i++)
    {
        for(int j=i+1;j<snakeList.size();j++)
        {
            //获取两个节点的位置 如果相同为true结束游戏
            if(snakeList.at(i)==snakeList.at(j))
            {
                return true;
            }
        }
    }
    return false;
}

void GameRoom::createNewFood()
{
    //看不懂生成的随机数 不知道你想做什么
     foodRect=QRectF(qrand()%(800/KSnakeNodeWidth)*KSnakeNodeWidth,
                     qrand()%(this->height()/kSnakeNodeHeight)*kSnakeNodeHeight,
                     KSnakeNodeWidth,
                     kSnakeNodeHeight);

}