save project

snake.py

@@ -10,22 +10,47 @@ a=pygame.time.Clock()
 # 背景
 # 背景
 background = pygame.image.load('bg.png')
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 food = pygame.image.load('apple.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 body = pygame.image.load('body.png')
 x,y=240,120
 x,y=240,120
 b=[(180,90),(180,120),(210,120),(x,y)]
 b=[(180,90),(180,120),(210,120),(x,y)]
+setheading='right'
+set_head=right
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading != 'left':
+                setheading = 'right'
+                set_head = right
+            if event.key == locals.K_LEFT and setheading != 'right':
+                setheading = 'left'
+                set_head = left
+            if event.key == locals.K_UP and setheading != 'down':
+                setheading = 'up'
+                set_head = up
+            if event.key == locals.K_DOWN and setheading != 'up':
+                setheading = 'down'
+                set_head = down
+    if setheading == 'right':
         x+=30
         x+=30
+    elif setheading == 'left':
+        x-=30
+    elif setheading == 'up':
+        y-=30
+    else:
+        y+=30
     b.append((x,y))
     b.append((x,y))
     b.pop(0) 
     b.pop(0) 
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
+    screen.blit(set_head, b[-1])
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
     for i in range(len(b)-1):
     for i in range(len(b)-1):
         screen.blit(body,b[i])
         screen.blit(body,b[i])
@@ -33,5 +58,4 @@ while True:
     screen.blit(food, (360, 300))
     screen.blit(food, (360, 300))
     # 刷新画面
     # 刷新画面
     pygame.display.update()
     pygame.display.update()
-    
     a.tick(3)
     a.tick(3)
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