pygame 按钮无法运行

Question

（英语不是我的第一语言，所以请原谅任何错误。）（谢谢大家！！）

当我点击按钮“1”时，BE01 将出现，但如果我不点击，scene01Img 将返回。

我尝试在 def BE01(): 中使用 gameExit = true，但它不起作用。

pygame.init()

clock = pygame.time.Clock()

def button(msg,x,y,w,h,ic,ac,action=None):

    mouse = pygame.mouse.get_pos()

    click = pygame.mouse.get_pressed()

    if x+w > mouse[0] > x and y+h > mouse[1] > y:

        pygame.draw.rect(gameDisplay, ac,(x,y,w,h))

        if click[0] == 1 and action != None:

            action()         

    else:

        pygame.draw.rect(gameDisplay, ic,(x,y,w,h))

    smallText = pygame.font.SysFont("comicsansms",20)

    textSurf, textRect = text_objects(msg, smallText)

    textRect.center = ( (x+(w/2)), (y+(h/2)) )

    gameDisplay.blit(textSurf, textRect)

def BE01():

    gameDisplay.fill(white)

    gameDisplay.blit(BE01Img,(0,0))

    button("BACK",350,450,100,50,black,gray,game_intro)

def game_intro():

    intro = True

    while intro:

        for event in pygame.event.get():

            if event.type == pygame.QUIT:

                pygame.quit()

                quit()

        gameDisplay.fill(white)

        gameDisplay.blit(introImg,(0,0))

        button("START",350,450,100,50,black,gray,game_loop)

        pygame.display.update()

        clock.tick(15)    

def quitgame():

    pygame.quit()

    quit()   

def game_loop():

    gameExit = False

    while not gameExit:

        for event in pygame.event.get():

            if event.type == pygame.QUIT:

                pygame.quit()

                quit()

        gameDisplay.fill(white)

        gameDisplay.blit(scene01Img,(0,0))

        button("1",200,450,100,50,black,gray,BE01)

        pygame.display.update()

        clock.tick(60)

game_intro()

game_loop()

pygame.quit()

quit()

单击“1”按钮后，BE01 将出现并运行另一个程序，scene01 不应出现。

Answer 1

每个场景都应该有自己的loop，当你按下按钮时，你应该去新的loop。如果您想在一个循环中更改元素，则将旧元素放入某个函数（即draw_intro），并将新元素放入其他函数（即draw_other） - 在开始时draw_intro在循环中使用，当您按下按钮时，将此函数替换为draw_other在 Python 中，您可以将函数名称（不带()）分配给变量show = print然后使用此名称（使用()）show("Hello World")你可以用draw_intro,做同样的事情draw_other。在游戏循环内（之前while）您可以设置global drawdraw = draw_intro 并在里面使用它 whiledraw()当您按下按钮时，它应该替换功能draw = draw_other这是完整的工作代码 - 我只删除了所有代码blit(image)以便在没有图像的情况下轻松运行它。import pygameblack = (0,0,0)white = (255,255,255)gray  = (128,128,128)red   = (255,0,0)pygame.init()gameDisplay = pygame.display.set_mode( (800,600))clock = pygame.time.Clock()def button(msg,x,y,w,h,ic,ac,action=None):    mouse = pygame.mouse.get_pos()    click = pygame.mouse.get_pressed()    if x+w > mouse[0] > x and y+h > mouse[1] > y:        pygame.draw.rect(gameDisplay, ac, (x,y,w,h))        if click[0] == 1 and action != None:            action()             else:        pygame.draw.rect(gameDisplay, ic, (x,y,w,h))    smallText = pygame.font.SysFont("comicsansms",20)    textSurf = smallText.render(msg, True, red)    textRect = textSurf.get_rect()    textRect.center = ( (x+(w/2)), (y+(h/2)) )    gameDisplay.blit(textSurf, textRect)def change_draw(new_draw):    global draw    draw = new_drawdef draw_BE01():    gameDisplay.fill(white)    #gameDisplay.blit(BE01Img,(0,0))    button("BACK",350,450,100,50,black,gray,lambda:change_draw(draw_intro))def draw_intro():    gameDisplay.fill(white)    #gameDisplay.blit(introImg,(0,0))    button("START",350,450,100,50,black,gray,lambda:change_draw(draw_other))def draw_other():    gameDisplay.fill(white)    #gameDisplay.blit(scene01Img,(0,0))    button("1",200,450,100,50,black,gray,lambda:change_draw(draw_BE01))def quitgame():    pygame.quit()    quit()   def game_loop():    global draw    draw = draw_intro    gameExit = False    while not gameExit:        for event in pygame.event.get():            if event.type == pygame.QUIT:                pygame.quit()                quit()        draw()        pygame.display.update()        clock.tick(60)game_loop()pygame.quit()quit()编辑：如果您之前没有使用lamda过，那么您可以不使用它，lambda但是您将需要change_draw_to_intro, change_draw_to_other,change_draw_to_BE01而不是单个change_drawimport pygameblack = (0,0,0)white = (255,255,255)gray  = (128,128,128)red   = (255,0,0)pygame.init()gameDisplay = pygame.display.set_mode( (800,600))clock = pygame.time.Clock()def button(msg,x,y,w,h,ic,ac,action=None):    mouse = pygame.mouse.get_pos()    click = pygame.mouse.get_pressed()    if x+w > mouse[0] > x and y+h > mouse[1] > y:        pygame.draw.rect(gameDisplay, ac, (x,y,w,h))        if click[0] == 1 and action != None:            action()             else:        pygame.draw.rect(gameDisplay, ic, (x,y,w,h))    smallText = pygame.font.SysFont("comicsansms",20)    textSurf = smallText.render(msg, True, red)    textRect = textSurf.get_rect()    textRect.center = ( (x+(w/2)), (y+(h/2)) )    gameDisplay.blit(textSurf, textRect)def change_draw_to_intro():    global draw    draw = draw_introdef change_draw_to_other():    global draw    draw = draw_otherdef change_draw_to_BE01():    global draw    draw = draw_BE01def draw_BE01():    gameDisplay.fill(white)    #gameDisplay.blit(BE01Img,(0,0))    button("BACK",350,450,100,50,black,gray,change_draw_to_intro)def draw_intro():    gameDisplay.fill(white)    #gameDisplay.blit(introImg,(0,0))    button("START",350,450,100,50,black,gray,change_draw_to_other)def draw_other():    gameDisplay.fill(white)    #gameDisplay.blit(scene01Img,(0,0))    button("1",200,450,100,50,black,gray,change_draw_to_BE01)def quitgame():    pygame.quit()    quit()   def game_loop():    global draw    draw = draw_intro    gameExit = False    while not gameExit:        for event in pygame.event.get():            if event.type == pygame.QUIT:                pygame.quit()                quit()        draw()        pygame.display.update()        clock.tick(60)game_loop()pygame.quit()quit()