From 650af12b6b7282838838293752dd20188b58a4fc Mon Sep 17 00:00:00 2001
From: 206530221 <978645995@qq.com>
Date: Sat, 19 Jun 2021 18:36:17 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?=
 =?UTF-8?q?=20''?=
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---
 bullet.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/bullet.py b/bullet.py
index 06e8fcf..3d737db 100644
--- a/bullet.py
+++ b/bullet.py
@@ -21,3 +21,14 @@ class Bullet(Sprite):
 
         self.color = ai_settings.bullet_color
         self.speed_factor = ai_settings.bullet_speed_factor
+
+    def update(self):
+        """向上移动子弹"""
+        # 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
+
+    def draw_bullet(self):
+        """在屏幕上绘制子弹"""
+        pygame.draw.rect(self.screen, self.color, self.rect)
\ No newline at end of file