Qt贪吃蛇（代码裸写，不用creator）

先上个图哇：



图1，第一关视图



图2，第二关视图

游戏说明：

(1).每关只需吃20颗红果即可通关

(2).增加新场景，在第二关出现

(3).增加刚打开程序READY状态，按空格开始

(4).增加暂停功能，在程序运行中按空格暂停，再按空格继续游戏

(5).只要不关闭应用程序，会保留关数，即在X关输了也是从X关开始

(6).每隔两关速度增快一次，场景重复出现

其实我就做了两个场景，但是是无数关（速度变快~嘿嘿），因为两个场景已经做到，再加场景只是体力活了哈，就不去搞了。这是完全跨平台的，win下的图我就不截了，下面是代码：

main.cpp

[cpp] view
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#include<QApplication>

#include"paint.h"

int main(int argc,char**argv)

{

QApplication app(argc,argv);

paint *sb=new paint;

sb->show();

return app.exec();

}

paint.h

[cpp] view
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#ifndef PAINT_H

#define PAINT_H

#include<QWidget>

#include<QPaintEvent>

#include<QKeyEvent>

#include<QTimer>

#include<QProgressBar>



enum Direct

{

Up,

Down,

Left,

Right

};

enum Result

{

Win,

Lose,

Normal,

Ready

};

class paint:public QWidget

{

Q_OBJECT

public:

paint(QWidget*parent=0);

~paint();

void init();

int getrandnum();

protected:

void paintEvent(QPaintEvent* );

void keyPressEvent(QKeyEvent *keyevent);

public slots://protected better??

void autorun();

private:

int snake[100][2];

int food[2];

int length;

Result res;

Direct dir;

QTimer *timer;

int count;

int level;

int speed;

int randsuanzi;

int jiou;

QProgressBar *progress;

};

#endif

paint.cpp

[cpp] view
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#include"paint.h"

#include<QtGui>

#define COUNTRANGE 20

paint::paint(QWidget*parent):QWidget(parent)

{

level=1;

speed=200;

init();

setWindowTitle("little snake v0.2");

timer=new QTimer;

timer->start(speed);

connect(timer,SIGNAL(timeout()),this,SLOT(autorun()));

setFixedSize(360,410);

progress=new QProgressBar;

progress->setRange(0,COUNTRANGE);

progress->setValue(count);

progress->setOrientation(Qt::Horizontal);

QVBoxLayout *main=new QVBoxLayout;

main->addStretch(2);

main->addWidget(progress);

setLayout(main);



}



paint::~paint(){}



void paint::init()

{

count=0;

length=4;

randsuanzi=0;

jiou=0;

dir=Up;

res=Ready;

snake[0][0]=20*1;

snake[0][1]=20*13;

snake[1][0]=20*1;

snake[1][1]=20*14;

snake[2][0]=20*1;

snake[2][1]=20*15;

snake[3][0]=20*1;

snake[3][1]=20*16;



food[0]=(getrandnum()+1)*20;

food[1]=(getrandnum()+1)*20;

for(int i=0;i<length;++i)

{

if(level%2)

{

if((food[0]-snake[i][0]==0)

&&(food[1]-snake[i][1]==0))

{

food[0]=(getrandnum()+1)*20;

food[1]=(getrandnum()+1)*20;

i=-1;

continue;

}

}

else

{

if(((food[0]==snake[i][0])&&(food[1]==snake[i][1]))

||((food[0]==5*20)&&(food[1]>=7*20)&&(food[1]<=10*20))

||((food[0]==12*20)&&(food[1]>=7*20)&&(food[1]<=10*20))

||((food[1]==5*20)&&(food[0]>=7*20)&&(food[0]<=10*20))

||((food[1]==12*20)&&(food[0]>=7*20)&&(food[0]<=10*20)))

{

food[0]=(getrandnum()+1)*20;

food[1]=(getrandnum()+1)*20;

i=-1;

continue;

}

}

}

}

int paint::getrandnum()

{

randsuanzi++;

srand(time(0)+randsuanzi);

if(randsuanzi>9999)

randsuanzi=0;

return rand()%16;//0~15

}

void paint::paintEvent(QPaintEvent* )

{

QPainter p(this);

QRectF border(20-20,20-20,16*20+40,16*20+40);

QRectF inter(20,20,16*20,16*20);

p.setPen(Qt::NoPen);

if(level%2)

{

p.setBrush(QBrush(Qt::darkGreen,Qt::SolidPattern));

}

else

{

p.setBrush(QBrush(Qt::darkCyan,Qt::SolidPattern));

}

p.drawRect(border);

p.setBrush(QBrush(Qt::lightGray,Qt::SolidPattern));

p.drawRect(inter);

p.setPen(QPen(Qt::darkGray,1,Qt::SolidLine,Qt::RoundCap,Qt::RoundJoin));

p.setBrush(QBrush(Qt::green));

QRectF snakehead(snake[0][0],snake[0][1],20,20);

p.drawRoundRect(snakehead);



QRectF snakefood(food[0],food[1],20,20);

p.setBrush(QBrush(Qt::darkRed));

p.drawEllipse(snakefood);



for(int i=1;i<length;++i)

{

QRectF snakebody(snake[i][0],snake[i][1],20,20);

p.setBrush(QBrush(Qt::red));

p.drawRoundRect(snakebody);

}

QRectF levelinfo(12*20,20,80,20);

if(level%2)

{

p.setPen(QPen(Qt::darkGreen));

}

else

{

p.setPen(QPen(Qt::darkCyan));

}

QString levelnum=QString::number(level,10);

QString levelstr="level ";

levelstr.append(levelnum);

p.drawText(levelinfo,Qt::AlignRight,levelstr);



QRectF xiaolei(9*20,0,8*20,20);

p.setPen(QPen(Qt::lightGray));

p.drawText(xiaolei,Qt::AlignRight,"made by kanglei");





if(!(level%2))

{

QRectF block1(5*20,7*20,20,4*20);

p.setBrush(QBrush(Qt::darkCyan));

p.drawRect(block1);

QRectF block2(7*20,5*20,4*20,20);

p.setBrush(QBrush(Qt::darkCyan));

p.drawRect(block2);

QRectF block3(12*20,7*20,20,4*20);

p.setBrush(QBrush(Qt::darkCyan));

p.drawRect(block3);

QRectF block4(7*20,12*20,4*20,20);

p.setBrush(QBrush(Qt::darkCyan));

p.drawRect(block4);

QRectF block_add1(0,8*20,20,40);

p.setBrush(QBrush(Qt::lightGray));

p.drawRect(block_add1);

QRectF block_add2(17*20,8*20,20,40);

p.setBrush(QBrush(Qt::lightGray));

p.drawRect(block_add2);

QRectF block_add3(8*20,0,40,20);

p.setBrush(QBrush(Qt::lightGray));

p.drawRect(block_add3);

QRectF block_add4(8*20,17*20,40,20);

p.setBrush(QBrush(Qt::lightGray));

p.drawRect(block_add4);

}

if(res==Ready)

{

p.setFont(QFont("",16,16));

p.setPen(QPen(Qt::yellow,60));

QRectF text(50,50,16*20-50,16*20-50);

p.drawText(text,Qt::AlignCenter,"Ready?\nPress Space start");

}

if(res==Lose)

{

p.setFont(QFont("",16,16));

p.setPen(QPen(Qt::yellow,60));

QRectF text(50,50,16*20-50,16*20-50);

p.drawText(text,Qt::AlignCenter,"LOSE!!\nPress Space restart");

}

if(res==Win)

{

p.setFont(QFont("",16,16));

p.setPen(QPen(Qt::yellow,60));

QRectF text(50,50,16*20-50,16*20-50);

p.drawText(text,Qt::AlignCenter,"WIN!!");

}

if((res==Normal)&&(jiou))

{

p.setFont(QFont("",16,16));

p.setPen(QPen(Qt::yellow,60));

QRectF text(50,50,16*20-50,16*20-50);

p.drawText(text,Qt::AlignCenter,"Pause");

}

}



void paint::keyPressEvent(QKeyEvent* keyevent)

{

switch(keyevent->key())

{

case Qt::Key_Up:

dir=Up;

break;

case Qt::Key_Down:

dir=Down;

break;

case Qt::Key_Left:

dir=Left;

break;

case Qt::Key_Right:

dir=Right;

break;

case Qt::Key_Space:

if(res==Ready)//start

{

res=Normal;

break;

}

if(res==Lose)//restart

{

init();

progress->setValue(count);

update();

break;

}

if(res==Normal)//pause

{

if(!jiou)

{

timer->stop();

jiou=1;

}

else

{

timer->start();

jiou=0;

}

update();

break;

}

}

}

void paint::autorun()

{

if(res==Normal)

{

int temp[2];

temp[0]=snake[length-1][0];

temp[1]=snake[length-1][1];

for(int i=length-1;i>0;--i)

{

snake[i][0]=snake[i-1][0];

snake[i][1]=snake[i-1][1];

}

if(dir==Up)

{

snake[0][1]-=20;

if(snake[0][1]==snake[2][1])

{

snake[0][1]+=40;

}

if(snake[0][1]<20||snake[0][1]>16*20)

{

if(level%2)//1,3,5...

res=Lose;

else

{

if(((snake[0][0]==8*20)

||(snake[0][0]==9*20))

&&(snake[0][1]==0))

{

snake[0][1]=16*20;

}

else if(((snake[0][0]==8*20)

||(snake[0][0]==9*20))

&&(snake[0][1]==17*20))

{

snake[0][1]=20;

}

else

res=Lose;

}

}

}

if(dir==Down)

{

snake[0][1]+=20;

if(snake[0][1]==snake[2][1])

{

snake[0][1]-=40;

}

if(snake[0][1]<20||snake[0][1]>16*20)

{

if(level%2)

res=Lose;

else

{

if(((snake[0][0]==8*20)

||(snake[0][0]==9*20))

&&(snake[0][1]==0))

{

snake[0][1]=16*20;

}

else if(((snake[0][0]==8*20)

||(snake[0][0]==9*20))

&&(snake[0][1]==17*20))

{

snake[0][1]=20;

}

else

res=Lose;

}

}

}

if(dir==Left)

{

snake[0][0]-=20;

if(snake[0][0]==snake[2][0])

{

snake[0][0]+=40;

}

if(snake[0][0]<20||snake[0][0]>16*20)

{

if(level%2)

res=Lose;

else

{

if(((snake[0][1]==8*20)

||(snake[0][1]==9*20))

&&(snake[0][0]==0))

{

snake[0][0]=16*20;

}

else if(((snake[0][1]==8*20)

||(snake[0][1]==9*20))

&&(snake[0][0]==17*20))

{

snake[0][0]=20;

}

else

res=Lose;

}

}

}

if(dir==Right)

{

snake[0][0]+=20;

if(snake[0][0]==snake[2][0])

{

snake[0][0]-=40;

}

if(snake[0][0]<20||snake[0][0]>16*20)

{

if(level%2)

res=Lose;

else

{

if(((snake[0][1]==8*20)

||(snake[0][1]==9*20))

&&(snake[0][0]==0))

{

snake[0][0]=16*20;

}

else if(((snake[0][1]==8*20)

||(snake[0][1]==9*20))

&&(snake[0][0]==17*20))

{

snake[0][0]=20;

}

else

res=Lose;

}

}

}

for(int i=1;i<length;++i)

{

if((snake[0][0]-snake[i][0]==0)\

&&(snake[0][1]-snake[i][1]==0))

{

res=Lose;

}

}

if(!(level%2))//2,4,6....

{

if((snake[0][0]==5*20)

&&(snake[0][1]>=7*20)

&&(snake[0][1]<=10*20))

{

res=Lose;

}

if((snake[0][0]==12*20)

&&(snake[0][1]>=7*20)

&&(snake[0][1]<=10*20))

{

res=Lose;

}

if((snake[0][1]==5*20)

&&(snake[0][0]>=7*20)

&&(snake[0][0]<=10*20))

{

res=Lose;

}

if((snake[0][1]==12*20)

&&(snake[0][0]>=7*20)

&&(snake[0][0]<=10*20))

{

res=Lose;

}

}

if((snake[0][0]==food[0])&&(snake[0][1]==food[1]))

{

count++;

progress->setValue(count);

length++;

snake[length-1][0]=temp[0];

snake[length-1][1]=temp[1];

food[0]=(getrandnum()+1)*20;

food[1]=(getrandnum()+1)*20;

for(int i=0;i<length;++i)

{

if(level%2)

{

if((food[0]-snake[i][0]==0)\

&&(food[1]-snake[i][1]==0))

{

food[0]=(getrandnum()+1)*20;

food[1]=(getrandnum()+1)*20;

i=-1;

continue;

}

}

else

{

if(((food[0]==snake[i][0])&&(food[1]==snake[i][1]))

||((food[0]==5*20)&&(food[1]>=7*20)&&(food[1]<=10*20))

||((food[0]==12*20)&&(food[1]>=7*20)&&(food[1]<=10*20))

||((food[1]==5*20)&&(food[0]>=7*20)&&(food[0]<=10*20))

||((food[1]==12*20)&&(food[0]>=7*20)&&(food[0]<=10*20)))

{

food[0]=(getrandnum()+1)*20;

food[1]=(getrandnum()+1)*20;

i=-1;

continue;

}

}

}

if(count>=COUNTRANGE)

{

level++;

if(level%2)

speed=speed-50;

if(speed<=0)

speed=20;

timer->start(speed);

init();

progress->setValue(count);

}

}

update();

}

}

代码很简单，我觉得写的也很条理，应该很清晰哈~用Qt creator确实可以快捷开发，但是搞的和visual studio一样，就没有意思了。所以我坚持vim下代码写，也很方便，400多行小游戏，很开心~哈哈~

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