save project

snake.py

@@ -15,15 +15,32 @@ body = pygame.image.load('body.png')
 FPS=pygame.time.Clock()
 x,y=240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
+heading='right'
 while True:
-    x+=30
-    position.append((x,y))
-    position.pop(0)
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    # 将背景图画上去
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and heading !='left':
+                heading='right'
+            if event.key==locals.K_LEFT and heading !='right':
+                heading='left'
+            if event.key==locals.K_UP and heading !='down':
+                heading='up'
+            if event.key==locals.K_DOWN and heading !='up':
+                heading='down'
+    
+    if heading=='right':
+        x+=30
+    elif heading=='left':
+        x-=30
+    elif heading=='up':
+        y-=30
+    else:
+        y+=30
+    position.append((x,y))
+    position.pop(0)
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     screen.blit(right, (x, y))