save project

snake.py

@@ -52,13 +52,15 @@ while True:
     else:
         y -= 30
 
-    if apple_x == x and apple_y == y:
-        apple_x = random.randint(0,660)
-        apple_y = random.randint(0,480)
-
-    # 将背景图画上去
     position.append((x,y))
+    if apple_x == x and apple_y == y:
+        num1 = random.randint(1,22)
+        num2 = random.randint(1,16)
+        apple_x = 30*num1-30
+        apple_y = 30*num2-30
+    else:
         position.pop(0)
+    # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     screen.blit(snake_head, position[-1])