修复每帧时间在场景中更新造成的雨滴状态没有随机分布的问题

src/scenes/main_menu_scene.py

@@ -12,11 +12,11 @@ class MainMenuScene(BaseScene):
     """
     主菜单场景，显示提示信息，展示雨天特效
     """
-    def __init__(self, screen, clock):
+    def __init__(self, screen):
         """
         初始化函数，初始化按钮按下状态、雨滴列表
         """
-        super().__init__(screen, clock)
+        super().__init__(screen)
         self.button_status = False
         self.mouse_status = None
         self.mouse_last_status = None
@@ -44,7 +44,7 @@ class MainMenuScene(BaseScene):
         # 鼠标位置
         self.mouse_pos = (0, 0)
 
-    def update(self):
+    def update(self, dt=0):
         # 按键按下则切换场景
         if self.button_status:
             self.switch_to_scene("GameScene")
@@ -62,7 +62,7 @@ class MainMenuScene(BaseScene):
         self.handle_keyboard()
 
         # 雨滴坠落
-        self.rain_fall()
+        self.rain_fall(dt)
 
         # 更新鼠标位置
         self.mouse_pos = pygame.mouse.get_pos()
@@ -216,12 +216,10 @@ class MainMenuScene(BaseScene):
             self.__rain_list_append(status)
 
 
-    def rain_fall(self):
+    def rain_fall(self, dt):
         """
         展示雨滴画面
         """
-        dt = self.clock.tick()
-
         for rain in self.rain_list:
 
             # 当状态在区间1时绘制雨滴线条