save project

snake.py

@@ -4,6 +4,7 @@ from pygame import locals
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 a=pygame.time.Clock()
+setheading='right'
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 # 背景
@@ -11,6 +12,10 @@ 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')
+head=right
 x,y=240,120
 k=[(180, 90),(180, 120),(210, 120),(x,y)]
 while True:
@@ -18,13 +23,34 @@ 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 setheading!='left':
+                setheading='right'
+                head=right
+            if event.key==locals.K_LEFT and setheading!='right':
+                setheading='left'
+                head=left
+            if event.key==locals.K_UP and setheading!='down':
+                setheading='up'
+                head=up
+            if event.key==locals.K_DOWN and setheading!='up':
+                setheading='down'
+                head=down
+
+    if setheading=='right':
+        x+=30
+    elif setheading=='left':
+        x-=30
+    elif setheading=='up':
+        y-=30
+    else :
+        y+=30
     k.append((x,y))
     k.pop(0)
     # 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(head, (x,y))
     # 将贪吃蛇的身体画上去
     for i in range(len(k)-1):
         screen.blit(body,k[i])