save project

snake.py

@@ -18,6 +18,7 @@ down = pygame.image.load('down.png')
 x,y=240,120
 pos=[(180, 90),(210, 120),(240, 120),(x,y)]
 setheading='right'
+snake_head=right
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -30,28 +31,27 @@ while True:
             if event.key==locals.K_LEFT and setheading!='right':
                 setheading='left'
                 snake_head=left
-        if event.key==locals.K_LEFT and setheading!='down':
+            if event.key==locals.K_UP setheading!='down':
                 setheading='up'
                 snake_head=up
-        if event.key==locals.K_LEFT and setheading!='up':
+            if event.key==locals.K_DOWNand setheading!='up':
                 setheading='down'
                 snake_head=down
-    x+=30
-    # 将背景图画上去
-    screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
-    # 将贪吃蛇的身体画上去
     if setheading=='right':
         x+=30
     elif setheading=='left':
         x-=30
     elif setheading=='up':
-        x-=30
+        y-=30
     else:
-        x+=30
+        y+=30
     pos.append((x,y))
     pos.pop(0)
+    # 将背景图画上去
+    screen.blit(background, (0, 0))
+    # 将贪吃蛇画上去
+    screen.blit(snake_head, (x,y))
+    # 将贪吃蛇的身体画上去
     screen.blit(body, pos[1])
     screen.blit(body, pos[2])
     screen.blit(body, pos[0])