save project

snake.py

@@ -13,28 +13,54 @@ 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()
-    x += 30   #  
+        elif event.type == locals.KEYDOWN:
+            if event.type == locals.K_RIGHT and setheading != "left":
+                setheading = 'right'
+                snake_head = right
+            if event.type == locals.K_LEFT and setheading != "right":
+                setheading = 'left'
+                snake_head = left
+            if event.type == locals.K_UP and setheading != "down":
+                setheading = 'up'
+                snake_head = up
+            if event.type == locals.K_DOWN and setheading != "up":
+                setheading = 'down'
+                snake_head = down
+
+
+    if setheading == "right":
+        x += 30
+    elif setheading == "left":
+        x -= 30
+    elif setheading == "up":
+        x += 30
+    else:
+        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, (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)):
+    for i in range(len(position)-1):
         screen.blit(body,position[i])
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+   
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面