save project

snake.py

@@ -12,21 +12,46 @@ 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
 e = [(180,90),(180,120),(210,120),(x,y)]
+head = 'right'
+snake = 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 head != 'left':
+                head = 'right'
+                snake = right
+            if event.key == locals.K_LEFT and head != 'right':
+                head = 'left'
+                snake = left
+            if event.key == locals.K_UP and head != 'down':
+                head = 'up'
+                snake = up
+            if event.key == locals.K_DOWN and head != 'up':
+                head = 'down'
+                snake = down
+    if head == 'right':
+        x += 30
+    elif head == 'left':
+        x -= 30
+    elif head == 'up':
+        y -= 30
+    else :
+        y += 30
     e.append((x,y))
     e.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, e [- 1])
+    screen.blit(snake, e [- 1])
     # 将贪吃蛇的身体画上去
     for i in range(len(e) - 1):
         screen.blit(body,e[i])