save project

snake.py

@@ -13,23 +13,51 @@ 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 = 240
-y = 120
+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
+        if 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 == "left":
+        x -= 30
+    elif setheading == "up" :
+        y -= 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):
         screen.blit(body,position[i])