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snake.py

@@ -10,28 +10,56 @@ screen = pygame.display.set_mode((660, 480))
 FPSCLOCK = pygame.time.Clock()  # pygame时钟，控制游戏速度（帧数）
 # 背景
 background = pygame.image.load('bg.png')
-right = pygame.image.load('right.png')
-food = pygame.image.load('apple.png')
+right = pygame.image.load('right.png')      # 头 朝右
+food = pygame.image.load('apple.png')       # 食物 苹果
 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)]                                #创建列表 获取坐标
+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   #
-    position.append((x, y))                                                          #追加贪吃蛇头的坐标
-    position.pop(0)                                                                  #删掉列表第一个元素
+        elif 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
+
+    # 设置贪吃蛇的头部坐标
+    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))
     # 将贪吃蛇的头画上去
-    screen.blit(right, position[-1])                                                #   获取头的下标            
+    screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
-    for i in range(len(position)-1):                                                #使用len函数获取列表长度
-        screen.blit(body, position[i])                                                #生成身体列表的下标
+    for i in range(len(position)-1):
+        screen.blit(body, position[i])
 
     # 将果实画上去
     screen.blit(food, (360, 300))