save project

snake.py

@@ -15,13 +15,30 @@ body = pygame.image.load('body.png')
 
 x, y = 240, 120
 position = [(180,90), (180,120), (210,120), (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()
-    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
@@ -41,3 +58,4 @@ while True:
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
+