save project

snake.py

@@ -12,21 +12,45 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.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')
+up=pygame.image.load("up.png")
+down=pygame.image.load("down.png")
+left=pygame.image.load("left.png")
+setheading="right"
 x=240
 x=240
 y=120
 y=120
 b=[(150, 120),(180, 120),(210, 120),(x,y)]
 b=[(150, 120),(180, 120),(210, 120),(x,y)]
 while True:
 while True:
+    screen.blit(background, (0, 0))
     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()
-    x+=30
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading!="left":
+                setheading="right"
+            if event.key==locals.K_LEFT and setheading!="right":
+                setheading="left"
+            if event.key==locals.K_UP and setheading!="down":
+                setheading="up"
+            if event.key==locals.K_DOWN and setheading!="up":
+                setheading="down"
+    if setheading=="right":
+        x+=30
+        screen.blit(right, (x, y))
+    if setheading=="left":
+        x-=30
+        screen.blit(left, (x, y))
+    if setheading=="up":
+        y-=30
+        screen.blit(up, (x, y))
+    if setheading=="down":
+        y+=30
+        screen.blit(down, (x, y))
     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))
+    
      #将贪吃蛇画上去
      #将贪吃蛇画上去
-    screen.blit(right, (x, y))
     #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])