save project

snake.py

@@ -6,12 +6,18 @@ pygame.init()
 screen = pygame.display.set_mode((660, 480))
 #设置初始坐标
 x,y=240,120
+chao='right'
+
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+down = pygame.image.load('down.png')
+up = pygame.image.load('up.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 fps=pygame.time.Clock()
+xiang=right
 #坐标
 zuo=[(180, 90),(180, 120),(210, 120),(x, y)]
 while True:
@@ -19,14 +25,35 @@ while True:
         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 chao != 'left':
+                chao='right'
+                xiang=right
+            if event.key == locals.K_UP and chao != 'down':
+                chao='up'
+                xiang=up
+            if event.key == locals.K_DOWN and chao != 'up':
+                chao='down'
+                xiang=down
+            if event.key == locals.K_LEFT and chao != 'right':
+                chao='left'
+                xiang=left
+    if chao=='right':
+        x+=30
+    elif chao=='left':
+        x-=30
+    elif chao=='up':
+        y-=30
+    else:
+        y+=30
+    
     zuo.append((x,y))
     zuo.pop(0)
     fps.tick(3)
     # 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(xiang,zuo[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(zuo)-1):
         screen.blit(body,zuo[i])