save project

snake.py

@@ -12,21 +12,48 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+up=pygame.image.load('up.png')
+down=pygame.image.load('down.png')
+left=pygame.image.load('left.png')
+
 x=240
 y=120
 position = [(180,90),(180,120),(210,120),(x,y)]
+fx = "right"
+tou = 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()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_UP and fx !="down":
+                fx = "up"
+                tou = up
+            if event.key == locals.K_DOWN and fx !="up":
+                fx = "down"
+                tou = down
+            if event.key == locals.K_LEFT and fx !="right":
+                fx = "left"
+                tou = left
+            if event.key == locals.K_RIGHT and fx !="left":
+                fx = "right"
+                tou = right
+        
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    x= x + 30
+    if fx=="right":
+        x = x +30
+    elif fx== "left":
+        x = x - 30
+    elif fx== "up":
+        y = y -30
+    else:
+        y = y +30
     position.append((x, y))
     position.pop(0)
-    screen.blit(right,position[-1])
+    screen.blit(tou,position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])