这个qt写的贪吃蛇是我在通过学校老师所录的视频简单学习之后，再根据网络上的视频(视频是在腾讯课堂上找的，我现在也找不到原视频了)做出的一个贪吃蛇小游戏。该游戏所实现的功能如下：
- 资源文件的使用
- 父子窗口的协调出现，父窗口的背景覆盖
- 蛇头和食物初次出现的随机数
- 按键函数的使用
- 绘图事件的使用
- 按钮组的使用
- 同一个按钮点击连接不同槽
最终游戏界面如下：游戏进入界面
游戏主要界面
⒈下面是相关文件的说明：
snake.pro为配置文件
widget为父窗口相关文件
gamewidget为子窗口相关文件
main.cpp没有做更改，默认数据
⒉widget.h中的代码
#ifndef WIDGET_H
#define WIDGET_H
#include<QWidget>
#include<QIcon>
#include<QPalette>
#include<QBrush>
#include<QPixmap>
#include<QPushButton>
#include<QMessageBox>
#include"gamewidget.h"
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = 0);
~Widget();
QPushButton *startPush;
QPushButton *exitPush;
QMessageBox *exitBox;
Gamewidget *gamewindow;//声明一个新的界面
private slots:
void M_startPush();
void M_exitPush();
};
#endif // WIDGET_H
⒊widget.cpp中的代码
#include "widget.h"
#include"gamewidget.h"
#include<QDebug>
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
this->resize(891,510);
this->setWindowTitle("李子的贪吃蛇");
this->setWindowIcon(QIcon(":/Picture/img/WindowPicture.jpg"));
QPalette palette;
palette.setBrush(QPalette::Background,QBrush(QPixmap(":/Picture/img/Back2.jpg")));
this->setStyleSheet("background-image:url(qrc:/new/Gamewindow/img/GameBack.jpg)");
this->setPalette(palette);
startPush=new QPushButton(this);
exitPush=new QPushButton(this);
startPush->setIconSize(QSize(920,45));
startPush->setGeometry(400,360,90,45);
startPush->setIcon(QIcon(":/Picture/img/Start.png"));
startPush->setFlat(1);
exitPush->setIconSize(QSize(90,45));
exitPush->setGeometry(400,420,90,45);
exitPush->setIcon(QIcon(":/Picture/img/Exit.png"));
exitPush->setFlat(1);//设置按钮的透明属性
exitBox=new QMessageBox;
connect(exitPush,SIGNAL(clicked(bool)),this,SLOT(M_exitPush()));
connect(startPush,SIGNAL(clicked(bool)),this,SLOT(M_startPush()));
}
void Widget::M_startPush()
{
gamewindow=new Gamewidget(this); //创建一个新的界面，任然以原来的界面为父窗口，退出后可以直接回到上一个界面。
gamewindow->show();
}
void Widget::M_exitPush()
{
if(QMessageBox::Yes==QMessageBox::question(this,"Tips：","Do you want to leave th ox:⒋gamewidget.h中的代码:No))
{
delet this;
exit(0);
}
}
⒋gamewidget.h中的代码
#ifndef GAMEWIDGET_H
#define GAMEWIDGET_H
#include <QWidget>
#include<QIcon>
#include<QPalette>
#include<QBrush>
#include<QPixmap>
#include<QPushButton>
#include<QMessageBox>
#include<QPaintEvent>
#include<QPainter>
#include<QLabel>
#include<QTimer>
#include<QTime>
#include<ctime>
#include<QButtonGroup>
#include<QKeyEvent>
#define longnumber 20//宏定义游戏界面方格的多少
#define widthnumber 16
class Gamewidget : public QWidget
{
Q_OBJECT
public:
explicit Gamewidget(QWidget *parent = 0);
void paintEvent(QPaintEvent*);
void keyPressEvent(QKeyEvent *e);
QPushButton *upPush;
QPushButton *downPush;
QPushButton *leftPush;
QPushButton *rightPush;
QPushButton *StartPush;
QPushButton *ExitPush;
QLabel *ScoreLabel;
QLabel *LevelLabel;
QLabel *ScoreLabelNumber;
QLabel *LevelLabelNumber;
QTimer *Timer;
int snake[200][2];//创建了一个包含蛇的身体坐标的数组
int snake1[200][2];//这个数组只是上一个坐标的复制，在最后一步（咬到身体或者撞到边缘）需要将它的身体坐标还原
static int m_setDiretion;//对方向的更改的存储
QButtonGroup *buttonGroup;//上下左右四个键构成一个按钮组，根据它们的返回值改变方向的值
int foodx;//食物的X坐标
int foody;//食物的Y坐标
int bodycount;
bool Nobite;
int Score;
int Difficulty;//难度级别，时间变化
private:
QPalette *palette;
signals:
public slots:
void M_timeout();
void M_startPush();
void M_setDiretion(int index);
void M_exitPush();
void M_pausePush();
void M_CheckGameOver();
};
#endif // GAMEWIDGET_H
⒌gamewidget.cpp中的代码
#include "gamewidget.h"
#include"widget.h"
#include<QDebug>
int Gamewidget::m_setDiretion=4;
Gamewidget::Gamewidget(QWidget *parent) : QWidget(parent)
{
qsrand(time(NULL));//随机数的种子
Score=0;
Difficulty=1;
this->setAutoFillBackground(true);//设置父窗口背景可被覆盖填充
this->resize(891,510);
this->setWindowTitle("李子的贪吃蛇");
this->setWindowIcon(QIcon(":/Picture/img/WindowPicture.jpg"));
QPalette palette;
palette.setBrush(QPalette::Background,QBrush(QPixmap(":/new/Gamewindow/img/GameBack.jpg").scaled(this->size())));
this->setPalette(palette);
upPush =new QPushButton(this);
downPush=new QPushButton(this);
leftPush=new QPushButton(this);
rightPush=new QPushButton(this);
StartPush=new QPushButton(this);
ExitPush=new QPushButton(this);
buttonGroup=new QButtonGroup(this);
buttonGroup->addButton(upPush,1);
buttonGroup->addButton(downPush,2);
buttonGroup->addButton(leftPush,3);
buttonGroup->addButton(rightPush,4);
connect(buttonGroup,SIGNAL(buttonClicked(int)),this,SLOT(M_setDiretion(int)));
upPush->setIconSize(QSize(45,90));
upPush->setGeometry(750,160,45,90);
upPush->setIcon(QIcon(":/new/Gamewindow/img/up.png"));
upPush->setFlat(1);
downPush->setIconSize(QSize(45,90));
downPush->setGeometry(750,260,45,90);
downPush->setIcon(QIcon(":/new/Gamewindow/img/down.png"));
downPush->setFlat(1);
leftPush->setIconSize(QSize(90,45));
leftPush->setGeometry(650,230,90,45);
leftPush->setIcon(QIcon(":/new/Gamewindow/img/left.png"));
leftPush->setFlat(1);
rightPush->setIconSize(QSize(90,45));
rightPush->setGeometry(800,230,90,45);
rightPush->setIcon(QIcon(":/new/Gamewindow/img/right.png"));
rightPush->setFlat(1);
StartPush->setIconSize(QSize(90,45));
StartPush->setGeometry(650,400,90,45);
StartPush->setFlat(1);
StartPush->setIcon(QIcon(":/Picture/img/Start.png"));
ExitPush->setIconSize(QSize(90,45));
ExitPush->setGeometry(780,400,90,45);
ExitPush->setIcon(QIcon(":/Picture/img/Exit.png"));
ExitPush->setFlat(1);
ScoreLabel=new QLabel(this);
LevelLabel=new QLabel(this);
ScoreLabel->setText("Score:");
ScoreLabel->setGeometry(690,10,120,90);
LevelLabel->setText("Level:");
LevelLabel->setGeometry(690,50,120,90);
ScoreLabelNumber=new QLabel(this);
LevelLabelNumber=new QLabel(this);
ScoreLabelNumber->setText(QString::number(Score)+"分");
ScoreLabelNumber->setGeometry(750,10,120,90);
LevelLabelNumber->setText(QString::number(Difficulty)+"级");
LevelLabelNumber->setGeometry(750,50,120,90);
Timer=new QTimer(this);
connect(Timer,SIGNAL(timeout()),this,SLOT(M_timeout()));
connect(StartPush,SIGNAL(clicked(bool)),this,SLOT(M_startPush()));
connect(ExitPush,SIGNAL(clicked(bool)),this,SLOT(M_exitPush()));
snake[0][0]=(rand()%18+1)*30+30;
snake[0][1]=(rand()%15+1)*30+30;
m_setDiretion=(rand()%4)+1;
foodx=(rand()%20)*30;
foody=(rand()%15)*30;
bodycount=1; //包含蛇的头和尾巴
Nobite=true;
this->repaint();
}
void Gamewidget::keyPressEvent(QKeyEvent *e)//按键处理
{
switch(e->key())
{
case Qt::Key_Up:if(m_setDiretion!=2)m_setDiretion=1; break;
case Qt::Key_W:if(m_setDiretion!=2)m_setDiretion=1; break;
case Qt::Key_Down:if(m_setDiretion!=1)m_setDiretion=2; break;
case Qt::Key_S:if(m_setDiretion!=1)m_setDiretion=2; break;
case Qt::Key_Left:if(m_setDiretion!=4)m_setDiretion=3; break;
case Qt::Key_A:if(m_setDiretion!=4)m_setDiretion=3; break;
case Qt::Key_Right:if(m_setDiretion!=3)m_setDiretion=4; break;
case Qt::Key_D:if(m_setDiretion!=3)m_setDiretion=4; break;
default: break;
}
}
void Gamewidget::paintEvent(QPaintEvent*)//绘图事件
{
QPainter painter(this);
if(0<=snake[0][0]&&snake[0][0]<=600&&0<=snake[0][1]&&snake[0][1]<=480&&Nobite)
{
qDebug()<<snake[0][0];
for(int i=bodycount;i>0;i--)
{
if(i==bodycount)//画出尾巴部分
{
if(snake[i][0]==snake[i-1][0]&&snake[i][1]<snake[i-1][1])
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/taildown.png"));
}
else if(snake[i][0]==snake[i-1][0]&&snake[i][1]>snake[i-1][1])
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/tailup.png"));
}
else if(snake[i][0]<snake[i-1][0]&&snake[i][1]==snake[i-1][1])
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/tailright.png"));
}
else if(snake[i][0]>snake[i-1][0]&&snake[i][1]==snake[i-1][1])
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/tailleft.png"));
}
}
else
{
if((snake[i][0]==snake[i-1][0]&& snake[i][1]<snake[i-1][1]&&snake[i+1][0]<snake[i][0]&&snake[i+1][1]==snake[i][1])||
((snake[i][0]>snake[i-1][0])&& snake[i][1]==snake[i-1][1]&&snake[i+1][0]==snake[i][0]&&snake[i+1][1]>snake[i][1]))
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/leftdown.png"));
}
else if((snake[i][0]<snake[i-1][0]&& snake[i][1]==snake[i-1][1]&&snake[i+1][0]==snake[i][0]&&snake[i+1][1]>snake[i][1])||
(snake[i][0]==snake[i-1][0]&& snake[i][1]<snake[i-1][1]&&snake[i+1][0]>snake[i][0]&&snake[i+1][1]==snake[i][1]))
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/rightdown.png"));
}
else if((snake[i][0]>snake[i-1][0]&& snake[i][1]==snake[i-1][1]&&snake[i+1][0]==snake[i][0]&&snake[i+1][1]<snake[i][1])||
(snake[i][0]==snake[i-1][0]&& snake[i][1]>snake[i-1][1]&&snake[i+1][0]<snake[i][0]&&snake[i+1][1]==snake[i][1]))
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/leftup.png"));
}
else if(((snake[i][0]==snake[i-1][0])&& snake[i][1]>snake[i-1][1]&&snake[i+1][0]>snake[i][0]&&snake[i+1][1]==snake[i][1])||
(snake[i][0]<snake[i-1][0]&& snake[i][1]==snake[i-1][1]&&snake[i+1][0]==snake[i][0]&&snake[i+1][1]<snake[i][1]))
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/rightup.png"));
}
else if((snake[i][0]==snake[i-1][0]&&snake[i][0]==snake[i+1][0])&&((snake[i][1]<snake[i-1][1]&&snake[i+1][1]<snake[i][1])||
(snake[i][1]>snake[i-1][1]&&snake[i+1][1]>snake[i][1])))
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/downup.png"));
}
else if ((snake[i][1]==snake[i-1][1]&&snake[i][1]==snake[i+1][1])&&((snake[i][0]<snake[i-1][0]&&snake[i+1][0]<snake[i][0])||
(snake[i][0]>snake[i-1][0]&&snake[i+1][0]>snake[i][0])))
{
painter.drawImage(QRect(snake[i][0],snake[i][1],30,30),QImage(":/new/Gamewindow/img/leftright.png"));
}
}
}
}
painter.drawImage(QRect(foodx,foody,30,30),QImage(":/new/Gamewindow/img/Apple.png"));
painter.setPen(Qt::green);
for(int i=0;i<=widthnumber;i++)
{
for(int j=0;j<=longnumber;j++)
{
painter.drawRect(QRect(30*j,30*i,30,30));
}
}
switch (m_setDiretion)
{
case 1: painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headup.png"));
if(bodycount==1) painter.drawImage(QRect(snake[0][0],snake[0][1]+30,30,30),QImage(":/new/Gamewindow/img/tailup.png"));
break;
case 2: painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headdown.png"));
if(bodycount==1) painter.drawImage(QRect(snake[0][0],snake[0][1]-30,30,30),QImage(":/new/Gamewindow/img/taildown.png"));
break;
case 3: painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headleft.png"));
if(bodycount==1) painter.drawImage(QRect(snake[0][0]+30,snake[0][1],30,30),QImage(":/new/Gamewindow/img/tailleft.png"));
break;
case 4: painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headright.png"));
if(bodycount==1) painter.drawImage(QRect(snake[0][0]-30,snake[0][1],30,30),QImage(":/new/Gamewindow/img/tailright.png"));
break;
default:
break;
}
}
void Gamewidget::M_timeout()
{
if(snake[0][0]==foodx&&snake[0][1]==foody)//当蛇头的坐标与食物坐标重合的时候，重新布置食物的位置
{
foodx=(rand()%20)*30;
foody=(rand()%15)*30;
bodycount++; //蛇的身体加一
Difficulty=bodycount/5+1;
Score=Score+Difficulty;
ScoreLabelNumber->setText(QString::number(Score)+"分");
LevelLabelNumber->setText(QString::number(Difficulty)+"级");
Timer->start(800-Difficulty>0? 800-Difficulty*80:80/(Difficulty-8));
}
memcpy(snake1,snake,sizeof(snake));
for(int i=bodycount;i>0;i--)//将蛇身体的前一个坐标赋值给后一个坐标，实现蛇身体的连续出现
{
snake[i][0]=snake[i-1][0];
snake[i][1]=snake[i-1][1];
}
QPainter painter(this);
for(int i=bodycount;i>3;i--)
{
if(snake[0][0]==snake[i][0]&&snake[0][1]==snake[i][1])
{
Nobite=false;
}
}
switch (m_setDiretion)
{
case 1: snake[0][1]=snake[0][1]-30,painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headup.png"))
;break;
case 2: snake[0][1]=snake[0][1]+30,painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headdown.png"))
; break;
case 3: snake[0][0]=snake[0][0]-30,painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headleft.png"))
; break;
case 4: snake[0][0]=snake[0][0]+30,painter.drawImage(QRect(snake[0][0],snake[0][1],30,30),QImage(":/new/Gamewindow/img/headright.png"))
;break;
default:
break;
}
if(0>snake[0][0]||snake[0][0]>600||0>snake[0][1]||snake[0][1]>480)
{
memcpy(snake,snake1,sizeof(snake));
Nobite=false;
}
this->update();
connect(Timer,SIGNAL(timeout()),this,SLOT(M_CheckGameOver()));
}
void Gamewidget::M_startPush()//时间函数开始计时
{
Timer->start(800);
disconnect(StartPush,SIGNAL(clicked(bool)),this,SLOT(M_startPush()));
StartPush->setIcon(QIcon(":/Picture/img/Pause.png"));
connect(StartPush,SIGNAL(clicked(bool)),this,SLOT(M_pausePush()));
}
void Gamewidget::M_pausePush()//实现开始与暂停按钮的管理
{
Timer->stop();
connect(StartPush,SIGNAL(clicked(bool)),this,SLOT(M_startPush()));
StartPush->setIcon(QIcon(":/Picture/img/Start.png"));
disconnect(StartPush,SIGNAL(clicked(bool)),this,SLOT(M_pausePush()));
}
void Gamewidget::M_setDiretion(int index)//接收按钮组的整数，确定方向
{
switch (index)
{
case 1:if(m_setDiretion!=2)m_setDiretion=1; break;
case 2:if(m_setDiretion!=1)m_setDiretion=2; break;
case 3:if(m_setDiretion!=4)m_setDiretion=3; break;
case 4:if(m_setDiretion!=3)m_setDiretion=4; break;
default: break;
}
}
void Gamewidget::M_exitPush()
{
this->close();
delete this;
}
void Gamewidget::M_CheckGameOver()//该部分原本在绘图事件函数中，但是由于在其中的时候程序总是意外关闭，故将其提出
{
if(0>snake[0][0]||snake[0][0]>600||0>snake[0][1]||snake[0][1]>480||(!Nobite))
{
Nobite=true;//将其设置为真,进入绘图函数画出蛇的身体
this->update();//调用绘图事件函数
Timer->stop();
if(QMessageBox::Yes==QMessageBox::information(this,"Tips：","Game Over!",QMessageBox::Yes))
{
this ->hide();
delete this;
return;
}
}
}
PS：这个游戏存在两个BUG
①由于游戏最开始设置绘图刷新在500ms，在这个时间内，连续按键可能导致蛇头出现反向，进而导致Game Over。
②游戏界面的图片不能随窗口大小而变化，放大窗口会出现重复图片
以上就是所有的源代码，这里附上代码的文件，包括图片资源文件，百度云网址：贪吃蛇(百度云界面若是显示文件不存在按F5刷新一下就好) 由于我是qt的初学者，这些代码有些部分难免会显得特别冗长，也希望各位能够指出，以供我学习一下。