save project

snake.py

@@ -22,7 +22,23 @@ 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
+    else:
+        y +=30
     position.append((x, y))
     position.pop(0)
     # 将背景图画上去