save project

snake.py

@@ -15,12 +15,34 @@ up = pygame.image.load('up.png')
 down = pygame.image.load('down.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+setheading = "right"
+snake_head = 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()
-    x=x+30
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_DOWN and setheading != "up":
+                setheading="down"
+                snake_head=down
+            if event.key==locals.K_UP and setheading != "down":
+                setheading="up"
+                snake_head=up
+            if event.key==locals.K_LEFT and setheading != "right":
+                setheading="left"
+                snake_head=left
+            if event.key==locals.K_RIGHT and setheading != "left":
+                setheading="right"
+                snake_head=right
+        if setheading == "right":
+            x+=30
+        elif setheading == "left":
+            x-=30
+        elif setheading == "down":
+            y+=30
+        else:
+            y-=30
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去