save project

snake.py

@@ -3,15 +3,19 @@ from pygame import locals
 
 
 # 初始化pygame，为使用硬件做准备
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 pygame.init()
-
+setheading="right"
 # 创建一个窗口
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 screen = pygame.display.set_mode((660, 480))
 a=pygame.time.Clock()
 a=pygame.time.Clock()
 # 背景
 # 背景
 background = pygame.image.load('bg.png')
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.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')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 body = pygame.image.load('body.png')
+snake_head=right
 x,y=240,90
 x,y=240,90
 b=[(180,60),(180,90),(210, 90),(x,y)]
 b=[(180,60),(180,90),(210, 90),(x,y)]
 while True:
 while True:
@@ -19,17 +23,37 @@ while True:
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
+        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
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     # 将贪吃蛇画上去
-    screen.blit(right, b[-1])
+    screen.blit(snake_head, b[-1])
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
     for i in range(len(b)-1):    
     for i in range(len(b)-1):    
         screen.blit(body, b[i])
         screen.blit(body, b[i])
     # 将果实画上去
     # 将果实画上去
     screen.blit(food, (360, 300))
     screen.blit(food, (360, 300))
     # 刷新画面
     # 刷新画面
-    x+=30
     b.append((x,y))
     b.append((x,y))
     b.pop(0)
     b.pop(0)
     pygame.display.update()
     pygame.display.update()