save project

snake.py

@@ -20,7 +20,23 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    x += 30
+        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
+    elif setheading=="right":
+        x += 30
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去