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snake.py

@@ -12,21 +12,52 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left =pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 x,y=240,120
+position=[(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+=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+=30
+    elif setheading=='left':
+        x-=30
+    elif setheading=='up':
+        y-=30
+    else:
+        y+=30
+    position.append((x,y)) #把头新坐标追加在列表里面
+    position.pop(0)  #删除列表的第一个元素
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x, y))
+    screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+    for i in range(len(position)-1):
+        screen.blit(body,position[i])
+    # screen.blit(body, (210, 120))
+    # screen.blit(body, (180, 120))
+    # screen.blit(body, (180, 90))
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面