save project

snake.py

@@ -25,7 +25,27 @@ while True:
         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'
+                set_head=right
+            if event.key==locals.K_LEFT and setheading!='right':
+                setheading='left'
+                set_head=left
+            if event.key==locals.K_UP and setheading!='down':
+                setheading='up'
+                set_head=up
+            if event.key==locals.K_DOWN and setheading!='up':
+                setheading='down'
+                set_head=down
+    if setheading=="right":
         x+=30
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去