如何在Pygame中实现点击开始按钮后显示3、2、1倒计时再启动游戏

Got it, let's add that countdown feature step by step. Here's how you can implement it smoothly without messing up your existing game logic:

核心思路 #

1. 在game()函数初始化完成后，先启动一个倒计时循环，显示3、2、1，每个数字停留1秒
2. 使用pygame.time.get_ticks()来精准控制时间（避免用time.sleep()，会导致程序冻结）
3. 倒计时期间保留基础事件处理，防止窗口无响应
4. 倒计时结束后，再进入原有的游戏主循环

修改后的完整game()函数 #

def game():
    running = True
    import pygame, sys
    import random
    import math as m
    # 提前导入pygame常量，避免循环内冗余导入
    from pygame.locals import QUIT, KEYDOWN, KEYUP, K_s, K_w, K_UP, K_DOWN, K_ESCAPE

    mainClock = pygame.time.Clock()
    pygame.init()
    pygame.font.init()
    pygame.display.set_caption('Ping Pong')
    SCREEN = width, height = 900,600
    white = (255, 255, 255)
    green = (0, 255, 0)
    blue = (0, 0, 128)
    black = (0,0,0)
    speed = [4,4]
    font = pygame.font.Font('freesansbold.ttf', 32)
    score = 0
    score_str = str(score)
    font.size(score_str)
    font.set_bold(True)
    text = font.render(score_str, True, white)
    textRect = text.get_rect()
    textRect.center = ((width/2 - width / 20), (height/60 + height/20))
    screen = pygame.display.set_mode(SCREEN, 0,32)
    height1 = height/4
    score = int(score_str)
    ball = pygame.Rect(width/2, height/2, 50,50)
    player = pygame.Rect(0,(height/2),25,height1)
    player_1 = pygame.Rect(width - 25,(height/2),25,height1)
    font1 = pygame.font.Font('freesansbold.ttf', 32)
    score1 = 0
    score1_str = str(score1)
    font1.size(score1_str)
    font1.set_bold(True)
    text1 = font1.render(score1_str, True, white)
    score1 = int(score1_str)
    textRect1 = text1.get_rect()
    textRect1.center = ((width/2 + width / 15), (height/60 + height/20))
    up = False
    down = False
    up_1 = False
    down_1 = False
    RED = (255,0,0)
    particles = []

    # -------------------------- 新增倒计时逻辑 --------------------------
    # 初始化倒计时变量
    countdown_num = 3
    start_ticks = pygame.time.get_ticks()  # 获取当前时间戳
    countdown_font = pygame.font.Font('freesansbold.ttf', 120)  # 大字体强化视觉效果
    countdown_running = True

    while countdown_running:
        # 计算已过去的时间（转换为秒）
        elapsed_time = (pygame.time.get_ticks() - start_ticks) / 1000

        # 处理基础事件，防止窗口卡死
        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                sys.exit()
            if event.type == KEYDOWN:
                if event.key == K_ESCAPE:
                    countdown_running = False
                    running = False

        # 每1秒切换一次倒计时数字
        if elapsed_time >= 1:
            countdown_num -= 1
            start_ticks = pygame.time.get_ticks()  # 重置时间戳
            # 倒计时结束，退出倒计时循环
            if countdown_num == 0:
                countdown_running = False

        # 绘制倒计时界面
        screen.fill(black)
        countdown_text = countdown_font.render(str(countdown_num), True, white)
        countdown_rect = countdown_text.get_rect(center=(width/2, height/2))
        screen.blit(countdown_text, countdown_rect)

        pygame.display.update()
        mainClock.tick(60)
    # -------------------------- 倒计时逻辑结束 --------------------------

    # 原游戏主循环
    while running:
        color = (192,192,192)
        # 清空屏幕
        screen.fill((0,0,0))
        screen.blit(text, textRect)
        screen.blit(text1, textRect1)
        bx = ball.centerx
        by = ball.centery
        particles.append([[bx, by],[random.randint(0,20) / 10 - 1, -1], random.randint(4,6)])
        for particle in particles:
            particle[0][0] += particle[1][0]
            particle[0][1] += particle[1][1]
            particle[2] -= 0.1
            particle[1][1] += 0.1
            pygame.draw.circle(screen, color, [int(particle[0][0]), int(particle[0][1])], int(particle[2]))
            if particle[2] <= 0:
                particles.remove(particle)
        if up == True:
            player.y -= 5
        if down == True:
            player.y += 5
        if up_1 == True:
            player_1.y -= 5
        if down_1 == True:
            player_1.y += 5
        if player.top < 0 :
            player.y = 0
        if player.bottom > height:
            player.bottom = height
        if player_1.top < 0 :
            player_1.y = 0
        if player_1.bottom > height :
            player_1.bottom = height
        for i in range(-90,(height + 130), 120):
            rectangle = pygame.Rect((width/2), i, 13, 60)
            pygame.draw.rect(screen, (255,255,255), rectangle)
        pygame.draw.rect(screen,(191, 224, 255),player)
        pygame.draw.rect(screen,(191, 224, 255),player_1)
        color = (192,192,192)
        r = random.randint(0, 255)
        g = random.randint(0, 255)
        b = random.randint(0, 255)
        pygame.draw.rect(screen,color,ball, 3)
        ball.x += speed[0]
        ball.y += speed[1]
        if ball.top < 0 or ball.bottom > height:
            speed[1] = -speed[1]
            r = random.randint(0,255)
            g = random.randint(0,255)
            b = random.randint(0,255)
            pygame.draw.rect(screen,(r,b,g),ball, 3)
        dab = random.randint(0,1)
        if ball.left < 0 :
            score1 += 1
            score1_str = str(score1)
            text1 = font1.render(score1_str, True, white)
            textRect1 = text1.get_rect()
            textRect1.center = ((width/2 + width / 15), (height/60 + height/20))
            ball.x = width/2
            ball.y = height/2
            if dab == 1:
                speed[0] = -speed[0]
                speed[1] = -speed[1]
            else:
                speed[0] = abs(speed[0])
                speed[1] = abs(speed[1])
        if ball.right > width:
            score += 1
            score_str = str(score)
            text = font.render(score_str, True, white)
            textRect = text.get_rect()
            textRect.center = ((width/2 - width / 20), (height/60 + height/20))
            ball.x = width/2
            ball.y = height/2
            if dab == 1:
                speed[0] = -speed[0]
                speed[1] = -speed[1]
            else:
                speed[0] = abs(speed[0])
                speed[1] = abs(speed[1])
        # 事件处理
        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                sys.exit()
            if event.type == KEYDOWN:
                if event.key == K_s:
                    down = True
                if event.key == K_w:
                    up = True
                if event.key == K_UP:
                    up_1 =True
                if event.key == K_ESCAPE:
                    running = False
                if event.key == K_DOWN:
                    down_1 = True
            if event.type == KEYUP:
                if event.key == K_s:
                    down = False
                if event.key == K_w:
                    up = False
                if event.key == K_UP:
                    up_1 = False
                if event.key == K_DOWN:
                    down_1 = False
        if ball.colliderect(player_1):
            dab = random.randint(0,1)
            if dab == 1:
                speed[1] = -speed[1]
            speed[0] = -speed[0]
            r = random.randint(0,255)
            g = random.randint(0,255)
            b = random.randint(0,255)
            pygame.draw.rect(screen,(r,b,g),ball, 3)
        if ball.colliderect(player):
            speed[0] = -speed[0]
            speed[0] = random.randint(4,6)
            r = random.randint(0,255)
            g = random.randint(0,255)
            b = random.randint(0,255)
            pygame.draw.rect(screen,(r,b,g),ball, 3)
        # 更新显示
        pygame.display.update()
        mainClock.tick(60)

关键修改点说明 #

• 新增独立的倒计时循环：在游戏主逻辑前运行，通过时间戳精准控制每个数字的停留时长
• 使用大字号字体显示倒计时，提升玩家感知度
• 倒计时期间保留事件处理逻辑，避免窗口失去响应
• 优化了原代码中的小问题（比如删除冗余的time模块导入、简化分数更新逻辑）

自定义调整建议 #

• 如果需要修改倒计时停留时间，把elapsed_time >= 1中的1改为对应秒数即可（比如2就是每个数字显示2秒）
• 可以修改countdown_font的字号或颜色，匹配你的游戏风格

内容的提问来源于stack exchange，提问作者AK - 10CA - Glenforest SS 2172