save project

snake.py

@@ -11,22 +11,47 @@ FPSCLOCK = pygame.time.Clock()
 background = pygame.image.load('bg.png')
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 food = pygame.image.load('apple.png')
-body = pygame.image.load('body.png')
+body = pygame.image.load('body.png') 
+left = pygame.image.load('left.png')
+up= pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 x,y = 240,120
 x,y = 240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
 position=[(180,90),(180,120),(210,120),(x,y)]
+setheading='right'
+snake_head=right
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
-    x=x+30
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_UP and setheading !='down':
+                setheading='up'
+                snake_head=up
+            if event.key==locals.K_DOWN and setheading !='up':
+                setheading='down'
+                snake_head=down
+            if event.key==locals.K_LEFT and setheading !='right':
+                setheading='left'
+                snake_head=left
+            if event.key==locals.K_RIGHT and setheading !='left':
+                setheading='right'
+                snake_head=right
+    if setheading=='right':
+        x=x+30
+    elif setheading=='left':
+        x=x-30
+    elif setheading=='up':
+        y=y-30
+    else:
+        y=y+30 
     position.append((x,y))
     position.append((x,y))
     position.pop(0)
     position.pop(0)
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     # 将贪吃蛇画上去
-    screen.blit(right,[x,y])
-    screen.blit(right, (position[-1]))
+    screen.blit(right,(x,y))
+    screen.blit(snake_head, position[-1])
     for i in range(len(position)-1):
     for i in range(len(position)-1):
         screen.blit(body,position[i])
         screen.blit(body,position[i])
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去