save project

snake.py

@@ -14,12 +14,34 @@ food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 x,y = 240,120
 p = [(180,90),(180,120),(210,120),(x,y)]
+setheading = "right"
+snake_head = 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()
+        elif event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading != "left":
+                setheading = "right"
+                snake_head = right
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading = "left"
+                snake_head = left
+            if event.key == locals.K_UP and setheading != "down":
+                setheading = "up"
+                snake_head = up
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading = "down"
+                snake_head = down  
+    if setheading == "right":
         x +=30
+    elif setheading == "right":
+        x -=30
+    elif setheading == "up":
+        y -=30
+    else:
+        y +=30
     p.append((x,y))
     p.pop(0)
     # 将背景图画上去
@@ -33,4 +55,4 @@ while True:
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(1000)
\ No newline at end of file
+    FPSCLOCK.tick(3)
\ No newline at end of file