save project

snake.py

@@ -12,22 +12,52 @@ 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
 position=[(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()
-    # 将背景图画上去
-    x +=30
+        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
+    if setheading == 'left':
+        x-=30
+    if setheading == 'up':
+        y-=30
+    if setheading == 'down':
+        y+=30
+
     position.append((x,y)) 
     position.pop(0)
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right,position[-1])
+    screen.blit(snake_head,position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])