save project

snake.py

@@ -18,11 +18,29 @@ body = pygame.image.load('body.png')
 FPS = pygame.time.Clock()
 x,y = 240,120
 position = [(180,90),(180,120),(210,120),(x,y)]
+heading = "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()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and heading != "left":
+                heading = "right"
+            if event.key == locals.K_LEFT and heading != "right":
+                heading = "left"
+            if event.key == locals.K_UP and heading != "down":
+                heading = "up"
+            if event.key == locals.K_DOWN and heading != "up":
+                heading = "down"
+    if heading == "right":
+        x += 30
+    if heading == "left":
+        x -= 30   
+    if heading == "up":
+        x -= 30
+    if heading == "down":
         x += 30
     position.append((x,y))
     position.pop(0)