Pygame游戏菜单问题

Question

所以我正在用Pygame制作一个游戏，我需要一个菜单，让玩家在不同的游戏类型之间进行选择。我试着让它在显示指令时，玩家可以使用键盘选择类型；然而，当我这样做的时候，游戏就会出错。指示将保留在屏幕上（有时会绘制平面精灵）。当按下'e'时，我添加了一行代码来打印shell中的某些内容，但没有打印任何内容。

def instructions(score):
    pygame.display.set_caption("Mail Pilot!")

    plane = Plane()
    ocean = Ocean()

    allSprites = pygame.sprite.Group(ocean, plane)
    insFont = pygame.font.SysFont(None, 50)
    insLabels = []
    instructions = (
    "Mail Pilot.     Last score: %d" % score ,
    "Instructions:  You are a mail pilot,",
    "delivering mail to the islands.",
    "",
    "Fly over an island to drop the mail,",
    "but be careful not to fly too close",    
    "to the clouds. Press 'e' for",
    "endless",
    "",
    "good luck!",
    "",
    "click to start, escape to quit..."
    )

    for line in instructions:
        tempLabel = insFont.render(line, 1, (255, 255, 0))
        insLabels.append(tempLabel)

    keepGoing = True
    clock = pygame.time.Clock()
    pygame.mouse.set_visible(False)
    while keepGoing:
        clock.tick(30)
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                keepGoing = False
                donePlaying = True
                pygame.display.quit()
                pygame.quit()
                sys.exit()
##            if event.type == pygame.MOUSEBUTTONDOWN:
##                keepGoing = False
##                donePlaying = False
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_e:
                    gameType = "endless"
                    keepGoing = False
                    donePlaying = False
                elif event.key == pygame.K_ESCAPE:
                    keepGoing = False
                    pygame.display.quit()
                    pygame.quit()
                    sys.exit()
                    donePlaying = True

        allSprites.update()
        allSprites.draw(screen)

        for i in range(len(insLabels)):
            screen.blit(insLabels[i], (50, 30*i))

        pygame.display.flip()

    plane.sndEngine.stop()    
    pygame.mouse.set_visible(True)
    return donePlaying

def main():
    gameType = ""
    donePlaying = False
    score = 0
    while not donePlaying:
        donePlaying = instructions(score)
        if not donePlaying:
            if gameType == "endless":
                score = gameEndless()


if __name__ == "__main__":
    main()

注释掉的部分是启动游戏的原始代码。

Answer 1

这也是我鄙视“全方位适用”事件驱动编程的另一个原因。虽然看起来你已经找到了解决办法，但我相信找到mousex和mousey最好的方法就是打电话

mousex,mousey = pygame.mouse.get_pos()

在事件循环之外。尽管MOUSEBUTTONUP当然适合它的使用，但在这种情况下，鼠标坐标的查找并不需要基于事件。

Answer 2

感谢@furas帮助我认识到这个问题！

为了修复程序，我在instructions类的if循环中添加了对游戏的直接调用。

if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_e:
                    gameType = "endless"
                    keepGoing = False
                    donePlaying = False
                    score = gameEndless()

然后在底部返回分数

return donePlaying, score

主循环不再调用游戏，而是在完成时调用指令

def main():
    donePlaying = False
    score = 0
    while not donePlaying:
        donePlaying = instructions(score)

这样，我可以绕过主循环问题，并添加一个更精简的方法，而不是在主、插图和游戏类型之间跳跃。