save project

snake.py

@@ -13,18 +13,43 @@ right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 FPS=pygame.time.Clock()
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+heading="right"
+snake_head=right
 while True:
-    x+=30
-    position.append((x,y))
-    position.pop(0)
     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_UP and heading!="down":
+                heading="up"
+                snake_head=up#
+            if event.key==locals.K_DOWN and heading!="up":
+                heading="down"
+                snake_head=down
+            if event.key==locals.K_LEFT and heading!="right":
+                heading="left"
+                snake_head=left
+            if event.key==locals.K_RIGHT and heading!="left":
+                heading="right"
+                snake_head=right
+    if heading=="right":
+        x+=30
+    if heading=="left":
+        x-=30
+    if heading=="down":
+        y+=30
+    if heading=="up":
+        y-=30
+    position.append((x,y))
+    #position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
+    screen.blit(snake_head, (x,y))
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])
@@ -33,5 +58,5 @@ while True:
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    FPS.tick(3)
+    FPS.tick(7.5)