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snake.py

@@ -12,23 +12,47 @@ screen = pygame.display.set_mode((660, 480))
 # 背景
 bg = 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')
 w=[(180, 90),(180, 120),(210, 120),(x,y)]
-
+setheading="right"
+snake_head=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=x+30
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading != "left":
+                setheading="right"
+                snake_head=right
+            if event.key==locals.K_LEFT and setheading != "right":
+                setheading="left"
+                snake_head=left
+            if event.key==locals.K_UP and setheading != "down":
+                setheading="up"
+                snake_head=up
+            if event.key==locals.K_DOWN and setheading != "up":
+                setheading="down"
+                snake_head=down
+    if setheading=="right":
+        x=x+30
+    if setheading=="left":
+        x=x-30
+    if setheading=="up":
+        y=y-30
+    if setheading=="down":
+        y=y+30
     w.append((x,y))
     w.pop(0)
  
     # 将背景图画上去
     screen.blit(bg, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
+    screen.blit(snake_head, (x,y))
     # 将贪吃蛇的身体画上去
     for i in range(len(w)-1):
        screen.blit(body,w[i])