save project

snake.py

@@ -14,7 +14,7 @@ food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 x,y=240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
-settheading="right"
+setheading="right"
 FPS=pygame.time.Clock()
 while True:
     for event in pygame.event.get():
@@ -22,8 +22,22 @@ while True:
             # 接收到退出事件后退出程序
             exit()
         if event.type==locals.KEYDOWN:
-
-    x +=30
+            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
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去