Question

我正在尝试在pygame中创建一个按钮。它应该在每次点击时显示三个新图像。一切正常，除了这些3个图像仅在单击按钮时出现。显示图像的代码如下，它是一个较大的while循环的一部分，它现在无限延续。如何才能使图像保持不变，直到再次按下按钮并出现新图像？感谢任何帮助，提前谢谢。

    mouse = pygame.mouse.get_pos ()
    click = pygame.mouse.get_pressed ()

    element = -1
    if 1120 > mouse [0] > 865 and 330 > mouse [1] > 250:
        screen.blit (dice_button_light, (870, 250))

        if click [0] == 1:
            dice_choices = Dice.dice_choice()
            print(dice_choices)


            element = -1
            for i in dice_choices:
                element += 1
                x = 750
                if element == 1:
                    x += 100
                if element == 2:
                    x += 200
                if i == 1:
                    screen.blit (dice1,(x,100))   
                elif i == 2:
                    screen.blit (dice2,(x,100))
                elif i == 3:
                    screen.blit (dice3,(x,100))
                elif i == 4:
                    screen.blit (dice4,(x,100))
                elif i == 5:
                    screen.blit (dice5,(x,100))
                elif i == 6:
                    screen.blit (dice6,(x,100))


    else:
        screen.blit (dice_button, (870, 250))

Answer 1

要循环浏览不同的图像，可以将它们放入列表中，只要单击按钮rect，就会递增表示当前图像的index变量。在while循环中，只需使用索引从列表中获取正确的图像。

import sys
import pygame as pg


# Three images.
IMG1 = pg.Surface((100, 100))
IMG1.fill((240, 240, 240))
pg.draw.circle(IMG1, (0, 0, 0), (50, 50), 10)
IMG2 = pg.Surface((100, 100))
IMG2.fill((240, 240, 240))
pg.draw.circle(IMG2, (0, 0, 0), (25, 25), 10)
pg.draw.circle(IMG2, (0, 0, 0), (75, 75), 10)
IMG3 = pg.Surface((100, 100))
IMG3.fill((240, 240, 240))
pg.draw.circle(IMG3, (0, 0, 0), (20, 20), 10)
pg.draw.circle(IMG3, (0, 0, 0), (50, 50), 10)
pg.draw.circle(IMG3, (0, 0, 0), (80, 80), 10)
# Put the images into a list or tuple.
IMAGES = [IMG1, IMG2, IMG3]


def main():
    screen = pg.display.set_mode((640, 480))
    clock = pg.time.Clock()
    bg_color = pg.Color(30, 40, 60)
    # Use this rect for the collision detection and blitting.
    img_rect = IMG1.get_rect(topleft=(200, 200))
    img_index = 0
    done = False

    while not done:
        for event in pg.event.get():
            if event.type == pg.QUIT:
                done = True
            if event.type == pg.MOUSEBUTTONDOWN:
                if img_rect.collidepoint(event.pos):
                    img_index += 1
                    # Modulo to cycle between 0, 1, 2.
                    img_index %= len(IMAGES)

        screen.fill(bg_color)
        # Use the index to get the current image and blit
        # it at the img_rect (topleft) position.
        screen.blit(IMAGES[img_index], img_rect)

        pg.display.flip()
        clock.tick(30)


if __name__ == '__main__':
    pg.init()
    main()
    pg.quit()
    sys.exit()

如何在pygame中显示按钮并更新图像？

1 个答案: