save project

snake.py

@@ -11,20 +11,44 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 x,y=240,120
 FPSCLOCK=pygame.time.Clock()
 position=[(210,120),(180,120),(180,90),(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
+        if event.type == locals.QUIT:              
             exit()
-    x+=30
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_UP and setheading != "down":
+                setheading = 'up'
+                snake_head = up
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading = 'left'
+                snake_head = left
+            if event.key == locals.K_RIGHT and setheading != "left":
+                setheading = 'right'
+                snake_head = right
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading = 'down'
+                snake_head = down
+    if setheading == "right" :
+        x+=30
+    elif setheading == "left" :
+        x-=30
+    elif setheading == "down" :
+        y+=30
+    else:
+        y-=30
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
-    screen.blit(right,position[-1])
+    screen.blit(snake_head,position[-1])
     # 将贪吃蛇画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])