为什么 pygame 按钮不起作用？

Question

我一直在按照 Sentdex 中的教程创建按钮并使其正常运行。我试图根据我的要求更改它。当我单击按钮时，我希望执行该功能（另一个屏幕）。我在功能（另一个屏幕）中放置了一个按钮，在那里我可以返回主页。但是当我点击按钮时，只有当我点击鼠标时它才会进入另一个功能，并且直到我点击鼠标时才会显示输出。它不会转到另一个屏幕并一直停留在初始屏幕。

import pygame
window = pygame.display.set_mode((1500, 800), pygame.RESIZABLE)

def text_objects(text, font):
    textSurface = font.render(text, True, (0,0,0))
    return textSurface, textSurface.get_rect()

def button(msg, x, y, w, h, ic, ac, action):
    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(window, ac, (x, y, w, h))
        if click[0] == 1:
            action()
    else:
        pygame.draw.rect(window, ic, (x, y, w, h))
    smallText = pygame.font.SysFont(None, 20)
    textSurf, textRect = text_objects(msg, smallText)
    textRect.center = ((x+(w/2)), (y+(h/2)))
    window.blit(textSurf, textRect)

def home_intro():
    run = True
    while run:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                 
        window.blit(image, (0,0))
        pygame.display.set_caption("PROGRAM")
        button("Start", 150, 450, 100, 50, (0,200,0), (255,255,210), start)
        button("Stop", 550, 450, 100, 50, (0,200,0), (255,255,210), stop)
        pygame.display.flip()


home_intro()
pygame.quit()
quit()

我都按照教程做了。但我不明白为什么它不起作用。我该如何解决这个问题？

Answer 1

您必须添加一个变量来存储游戏的当前状态 (game_state )。当点击按钮时更改变量并根据变量的状态绘制不同的场景：

game_state = "stop"

def start():
    global game_state
    game_state = "start" 

def stop():
    global game_state
    game_state = "stop"

def home_intro():
    global game_state

    run = True
    while run:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                 
        window.blit(image, (0,0))
        button("Start", 150, 450, 100, 50, (0,200,0), (255,255,210), start)
        button("Stop", 550, 450, 100, 50, (0,200,0), (255,255,210), stop)

        if game_state == "start":
            # [...]

        else:
            # [...]

        pygame.display.flip()

为什么 pygame 按钮不起作用？

Why is pygame button not functioning?

python

pygame

button