From 028fe0508243c42661111c1acc0dc69c0a5a3fbe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=A2=81=E8=8A=B3?= <3231711930@qq.com>
Date: Fri, 18 Jun 2021 07:57:23 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AD=90=E5=BC=B9?=
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---
 bullet.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/bullet.py b/bullet.py
index 0da35b8..d5503a5 100644
--- a/bullet.py
+++ b/bullet.py
@@ -58,4 +58,11 @@ class BossBullet(Sprite):
 
         self.color = ai_settings.bossbullet_color
         self.speed_factor = ai_settings.bossbullet_speed_factor
-        self.height = ai_settings.bossbullet_height
\ No newline at end of file
+        self.height = ai_settings.bossbullet_height
+
+    def update(self):
+        """向下移动子弹"""
+        # 更新表示子弹位置的小数值
+        self.y += self.speed_factor
+        # 更新表示子弹的rect的位置
+        self.rect.y = self.y