使用PyGame切换到菜单的好方法

import pygame

# 初始化PyGame
pygame.init()

# 设置窗口大小和标题
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("Menu Example")

# 菜单界面的背景颜色
background_color = (255, 255, 255)

# 菜单按钮的颜色和位置
button_color = (0, 0, 255)
button_width = 200
button_height = 50
button_x = (screen_width - button_width) // 2
button_y = (screen_height - button_height) // 2

# 游戏场景的背景颜色
game_background_color = (0, 255, 0)

# 菜单状态
menu_active = True

# 游戏状态
game_active = False

# 游戏主循环
while True:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()
        elif event.type == pygame.MOUSEBUTTONDOWN:
            if menu_active:
                # 检查鼠标点击位置是否在菜单按钮内
                mouse_x, mouse_y = pygame.mouse.get_pos()
                if button_x <= mouse_x <= button_x + button_width and button_y <= mouse_y <= button_y + button_height:
                    # 切换到游戏场景
                    menu_active = False
                    game_active = True

    # 绘制菜单界面
    if menu_active:
        screen.fill(background_color)
        pygame.draw.rect(screen, button_color, (button_x, button_y, button_width, button_height))
        pygame.display.flip()

    # 绘制游戏场景
    if game_active:
        screen.fill(game_background_color)
        pygame.display.flip()