save project

snake.py

@@ -12,14 +12,34 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+left = pygame.image.load('down.png')
 x,y=240,120
 p=[(210,120),(180,120),(180,90),(x,y)]
+setheading="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_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"
+    if setheading =="right":
         x+=30
+    elif setheading =="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
     p.append((x,y))
     p.pop(0)
     # 将背景图画上去