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snake.py

@@ -10,22 +10,48 @@ screen = pygame.display.set_mode((660, 480))
 # 背景
 background = pygame.image.load('bg.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')
 body = pygame.image.load('body.png')
 x,y=240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
+setheading="right"
+a=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'
+                a=right
+            if event.key==locals.K_LEFT and setheading !="right":
+                setheading='left'
+                a=left
+            if event.key==locals.K_UP and setheading !="down":
+                setheading='up'
+                a=up
+            if event.key==locals.K_DOWN and setheading !="up":
+                setheading='down'
+                a=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(a, position[-1])
     for i in range(len(position)-1):
         screen.blit(body,position[i])
     # 将贪吃蛇的身体画上去