pygame学习笔记（6）：完成一个简单的游戏

学了这么长时间的Pygame，一直想写个游戏实战一下。看起来很简单的游戏，写其来怎么这么难。最初想写个俄罗斯方块，想了很长时间如何实现，想来想去，也没写出来，于是干脆下载别人的代码来读。后来，要想写一个帮助记忆的挖宝箱的游戏，结果也没完成。唯一完成了就是下面这个小人接金币的游戏，超级简单，通过左右键控制小人移动去接空中下来的金币，接住金币得5分，接不住游戏结束，金币速度会随着level的关数而越来越快。完成这段代码后，我依然觉得这段代码写得很差，确实也是自己对pygame只是掌握了皮毛，对surface、sprite这些理解的还不透彻。这里把代码写出来，有时间的大牛们可以帮助指点一下，让我也有所提高。

    # -*- coding: cp936 -*-
    '''
    一个超级简单的游戏
    左右键控制小人移动去接空中下来的金币，接住金币得5分，接不住游戏结束，金币速度会随着level的关数
    而越来越快
    '''
    import pygame,sys,os,random
    pygame.init()

    class rect():#画出小人
      def __init__(self,filename,initial_position):
        self.image=pygame.image.load(filename)
        self.rect=self.image.get_rect()
        self.rect.topleft=initial_position

    class goldrect(pygame.sprite.Sprite):#绘出金币
      def __init__(self,gold_position,speed):
        pygame.sprite.Sprite.__init__(self)
        self.image=pygame.image.load('image\\gold.png')
        self.rect=self.image.get_rect()
        self.rect.topleft=gold_position
        self.speed=speed
      def move(self):
        self.rect=self.rect.move(self.speed)





    def drawback(): #绘出背景图片
      my_back=pygame.image.load('image\\qi3.jpg') 
      bakscreen.blit(my_back,[0,0])


    def loadtext(levelnum,score,highscore):#绘出成绩、level、最高分等
      my_font=pygame.font.SysFont(None,24)
      levelstr='Level:'+str(levelnum)
      text_screen=my_font.render(levelstr, True, (255, 0, 0))
      bakscreen.blit(text_screen, (650,50))
      highscorestr='Higescore:'+str(highscore)
      text_screen=my_font.render(highscorestr, True, (255, 0, 0))
      bakscreen.blit(text_screen, (650,80))
      scorestr='Score:'+str(score)
      text_screen=my_font.render(scorestr, True, (255, 0, 0))
      bakscreen.blit(text_screen, (650,110))  

    def loadgameover(scorenum,highscore):#绘出GAME OVER
      my_font=pygame.font.SysFont(None,50)
      levelstr='GAME OVER'
      over_screen=my_font.render(levelstr, True, (255, 0, 0))
      bakscreen.blit(over_screen, (300,240))
      highscorestr='YOUR SCORE IS '+str(scorenum)
      over_screen=my_font.render(highscorestr, True, (255, 0, 0))
      bakscreen.blit(over_screen, (280,290))
      if scorenum>int(highscore):#写入最高分
        highscorestr='YOUR HAVE GOT THE HIGHEST SCORE!'
        text_screen=my_font.render(highscorestr, True, (255, 0, 0))
        bakscreen.blit(text_screen, (100,340))
        highfile=open('highscore','w')
        highfile.writelines(str(scorenum)) 
        highfile.close() 

    def gethighscore(): #读取最高分
      if os.path.isfile('highscore'):
        highfile=open('highscore','r')
        highscore=highfile.readline() 
        highfile.close() 
      else:
        highscore=0
      return highscore

    bakscreen=pygame.display.set_mode([800,600])
    bakscreen.fill([0,160,233])
    pygame.display.set_caption('Dig!Dig!')
    drawback()



    levelnum=1 #level
    scorenum=0 #得分
    highscore=gethighscore()#最高分
    ileft=1 #记录向左移动步数，用来控制图片
    iright=10 #记录向右移动步数，用来控制图片
    x=100
    y=450
    filename='image\\1.png'
    backimg_ren=rect(filename,[x,y])
    bakscreen.blit(backimg_ren.image,backimg_ren.rect)
    loadtext(levelnum,scorenum,highscore)
    goldx=random.randint(50,580)
    speed=[0,levelnum]
    mygold=goldrect([goldx,100],speed) 
    pygame.display.update()

    while True:
      if scorenum>0 and scorenum/50.0==int(scorenum/50.0):#当得分是50的倍数时修改level
        levelnum=scorenum/50+1
        speed=[0,levelnum]

      for event in pygame.event.get():
        if event.type==pygame.QUIT:
          sys.exit()
      #make gold  

      pressed_keys = pygame.key.get_pressed()
      if pressed_keys[pygame.K_LEFT]:#按下左键

        drawback() 
        loadtext(levelnum,scorenum,highscore)

        if iright > 14 :iright=10
        iright=iright+1
        filename='image\\'+str(iright)+'.png'
        if x<50 :
          x=50
        else:
          x=x-10

        backimg_surface=rect(filename,[x,y])
        bakscreen.blit(backimg_surface.image,backimg_surface.rect)


      if pressed_keys[pygame.K_RIGHT]:#按下右键

        drawback()
        loadtext(levelnum,scorenum,highscore)

        if ileft > 4 :ileft=0
        ileft=ileft+1
        filename='image\\'+str(ileft)+'.png'
        if x>560:
          x=560
        else:
          x=x+10

        backimg_surface=rect(filename,[x,y])
        bakscreen.blit(backimg_surface.image,backimg_surface.rect)

      drawback()
      loadtext(levelnum,scorenum,highscore)
      mygold.move()
      bakscreen.blit(mygold.image,mygold.rect) 

      backimg_surface=rect(filename,[x,y])
      bakscreen.blit(backimg_surface.image,backimg_surface.rect)
      if mygold.rect.top>600:#判断金币是否着地，一但着地，游戏结束
        loadgameover(scorenum,highscore)
      if mygold.rect.colliderect(backimg_surface.rect):#判断金币是否与小人碰撞，如果碰撞表示小人接到金币
        scorenum+=5
        loadtext(levelnum,scorenum,highscore)
        goldx=random.randint(50,580)
        mygold=goldrect([goldx,100],speed) 
      pygame.display.update()

程序中用到的资源可从这里下载：文件名：gold.7z, 访问地址：http://www.kuaipan.cn/file/id_16699292408348719.htm