save project

snake.py

@@ -14,18 +14,31 @@ 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')
 x,y=240,120
 x,y=240,120
+setheading="right"
 position=[(180, 90),(180, 120),(210, 120),(x,y)]
 position=[(180, 90),(180, 120),(210, 120),(x,y)]
+
+
 while True:
 while True:
-    
-    x+=30
     position.append((x,y))
     position.append((x,y))
     position.pop(0)
     position.pop(0)
     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()
-    
+    if event.type == locals.KEYDOWN:
+        if event.key == locals.K_RIGHT and setheading !="left":
+            setheading = "right"
+        if event.key == locals.K_LEFT and setheading !="right":
+            setheading = "left"
+        if event.key == locals.K_UP and setheading !="down":
+            setheading = "up"
+        if event.key == locals.K_DOWN and setheading !="up":
+            setheading = "down"
     # 将背景图画上去
     # 将背景图画上去
+    if setheading == right:
+        x+=30
+    elif setheading == left:
+        x-=30
     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, position[-1])
     screen.blit(right, position[-1])