save project

snake.py

@@ -12,24 +12,52 @@ 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,y=240,120
 
 FPSCLOCK=pygame.time.Clock()
-
 position=[(180, 90),(180, 120),(210, 120),(x,y)]
+setheading="right"
+snake_head=right
+snake_head=left
+snake_head=up
+snake_head=down
+
 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()
-    x=x+30
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading !="left":
+               setheading = "right"
+               snake_head=right
+            if event.key==locals.K_LEFT and setheading !="right":
+               setheading = "left"
+               snake_head=left
+            if event.key==locals.K_UP and setheading !="down":
+               setheading = "up"
+               snake_head=down
+            if event.key==locals.K_DOWN and setheading !="up":
+               setheading = "down"
+               snake_head=up
+            
+    #x=x+30
+    if setheading == "right":
+        x = x+30
+    if setheading == "left":
+        x = x-30
+    if setheading == "up"
+
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, position[-1])
+    screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])