save project

snake.py

@@ -12,22 +12,47 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+down = pygame.image.load('down.png')
+up = pygame.image.load('up.png')
+left = pygame.image.load('left.png')
 x,y=240,120
 s=pygame.time.Clock()
 a=[(210,120),(180,120),(180,90),(x,y)]
+set1='right'
+st=right
 while True:
-    for event in pygame.event.get():
-        if event.type == locals.QUIT:
+    for i in pygame.event.get():
+        if i.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    x+=30
-
+        if i.type == locals.KEYDOWN:
+            if i.key == locals.K_RIGHT and set1 != 'left':
+                set1='right'
+                st=right
+            if i.key == locals.K_LEFT and set1 !='right':
+                set1='left'
+                st=left
+            if i.key == locals.K_UP and set1 !='down':
+                set1='up'
+                st=up
+            if i.key == locals.K_DOWN and set1 != 'up':
+                set1='down'
+                st=down
+    if set1=='right':
+        x+=30
+    elif set1=='left':
+        x-=30
+    elif set1=='down':
+        y+=30
+    else:
+        y-=30
+    
     a.append((x,y))
     a.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, a[-1])
+    screen.blit(st, a[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(a)-1):
         screen.blit(body,a[i])