save project

snake.py

@@ -10,18 +10,42 @@ FPS = pygame.time.Clock()
 
 x,y=240,120
 S=[(180,90),(180,120),(210,120),(x,y)]
+
+setheading = "right"
+
 #背景
 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')
+body = pygame.image.load('body.png')
 
 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'
+            if event.key == locals.K_LEFT and setheading !="right":
+                setheading = 'left'
+            if event.key == locals.K_UP and setheading !="down":
+                setheading = 'up'
+            if event.key == locals.K_DOWN and setheading !="up":
+                setheading = 'down'
+            
+    if setheading == "right":
+        x += 30
+    if setheading == "left":
+        x -= 30
+    if setheading == "right":
+        y -= 30
+    else:
+        y += 30
+
     S.append((x,y))
     S.pop(0)
     # 将背景图画上去