save project

snake.py

@@ -3,8 +3,6 @@ from pygame import locals
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
-x,y = 240,120
-position=[(180,90),(180,120),(210,120),(x,y)]
 
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
@@ -17,13 +15,37 @@ 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)]
 
+setheading="right"
+snack_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_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
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去