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snake.py

@@ -6,27 +6,62 @@ pygame.init()
 
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
-
+clock = pygame.time.Clock() #创建时钟
 # 背景
 background = pygame.image.load('bg.png')
+
 right = pygame.image.load('right.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
+
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+x, y = 240,120 #设置蛇头的x坐标
+position = [(180, 90),(180, 120),(210, 120),(240,120)] #用来记录蛇头和身体的位置
 
+setheading = 'right'#设置方向
+head = right
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+        #按键控制贪吃蛇
+        if event.type == locals.KEYDOWN: #是否按下键盘
+            if event.key == locals.K_RIGHT and setheading != 'left':  #控制蛇头向右
+                setheading = 'right'
+                head = right
+            elif event.key == locals.K_LEFT and setheading != 'right':  #控制蛇头向左
+                setheading = 'left'
+                head = left
+            elif event.key == locals.K_UP and setheading != 'down':
+                setheading = 'up'
+                head = up
+            elif event.key == locals.K_DOWN and setheading != 'up':  
+                setheading = 'down'
+                head = down
+    if setheading == 'right':
+        x += 30
+    elif setheading == 'left':
+        x -= 30
+    elif setheading == 'up':
+        y -= 30
+    else:
+        y += 30
+
+    position.append((x,y)) #将当前蛇头位置添加到列表中
+    position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
+    screen.blit(head, (x, y))
     # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+    for i in range(len(position)-1):
+        screen.blit(body, position[i])
+    
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
+    clock.tick(3)  #设置帧数
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