save project

snake.py

@@ -5,27 +5,55 @@ from pygame import locals
 pygame.init()
 FPS=pygame.time.Clock()
 # 创建一个窗口
+setheading="right"
 screen = pygame.display.set_mode((660, 480))
 x,y=240, 120
 a=[(180, 90),(180, 120),(210, 120),(x,y)]
 # 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')
+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_DOWN and setheading!="up":
+                setheading = "down"
+                snake_head=down
+            if event.key==locals.K_UP and setheading!="down":
+                setheading = "up"
+                snake_head=up
+            
+    if setheading=="left":
+         x-=30
+    elif setheading=="right":
+        x+=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
+            
+    
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     a.append((x,y))
     a.pop(0)
-    screen.blit(right, a[-1])
+    screen.blit(snake_head, a[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(a)-1):
         screen.blit(body, a[i])