save project

snake.py

@@ -4,6 +4,7 @@ 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()
 x,y=240,120
 x,y=240,120
+setheading="right"
 l=[(180,90),(180,120),(210,120),(x,y)]
 l=[(180,90),(180,120),(210,120),(x,y)]
 # 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))
@@ -21,7 +22,23 @@ 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()
-    x+=30
+        elif event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading!='left':
+                setheading='right'
+            if event.key==locals.K_LEFT and setheading!='right':
+                setheading='left'
+            if event.key==locals.K_DOWN and setheading!='up':
+                setheading='down'
+            if event.key==locals.K_UP and setheading!='down':
+                setheading='up'
+    if setheading=="right":
+        x+=30
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
     l.append((x,y))
     l.append((x,y))
     l.pop(0)
     l.pop(0)
     # 将背景图画上去
     # 将背景图画上去
@@ -38,4 +55,4 @@ while True:
     # 刷新画面
     # 刷新画面
     pygame.display.update()
     pygame.display.update()
     
     
-    shi.tick(3)
+    shi.tick(5)
\ No newline at end of file