如何隐藏screen.blit()

Question

我做了一个背景音乐，我把音量设为静音和非静音的精灵，并使它可以点击，当你静音音乐时，我希望screen.blit(取消静音)消失。

源代码：

...
x = 0
pygame.mixer.music.load("soundtrack.wav")
volume = pygame.image.load("volume.png")
mute = pygame.image.load("mute.png")
resized_volume = pygame.transform.scale(volume, (100, 100))
resized_mute = pygame.transform.scale(mute, (100,100))
pygame.mixer.music.play(-1,0.0)


while Loop: # main game loop
...


        if event.type == MOUSEBUTTONDOWN:
            if event.button == 1: # 1 == left
                vol_rect = volume.get_rect(topleft = (700,500))
                if vol_rect.collidepoint(event.pos):
                    x += 1
                    if x > 2:
                        x = 1
                    if x == 1:
                        screen.blit(mute,(700,500))
                        pygame.mixer.music.pause()
                    else:
                        if x == 2:
                            screen.blit(volume, (700,500))
                            pygame.mixer.music.unpause()

...

pygame.quit()
sys.exit()

Answer 1

您必须在每一帧中重新绘制场景。根据变量x的值绘制精灵。例如：

while Loop: # main game loop

    # [...]

    if event.type == MOUSEBUTTONDOWN:
        if event.button == 1: # 1 == left
            # [...]

    # [...]

    if x == 0:
        # [...] draw something different
    elif x == 1:
        screen.blit(mute,(700,500))
    elif x == 2:
        screen.blit(volume, (700,500))

    # [...]

Answer 2

我没有尝试，但我希望它能起作用：

class MuteUnmute_Button:
    def __init__(self):
        self.x = 500
        self.y = 400
        self.state = True
        self.mute_image = pygame.image.load("mute_image.png")
        self.unmute_image = pygame.image.load("unmute_image.png")
        self.image = mute_image
        self.screen = screen
    def redraw(self):
        self.screen.blit(self.image,(self.x,self.y))
    def checkCollision(self):
        rect = self.image.get_rect()
        return rect.collidepoint(pygame.mouse.pos)
    def changeImage(self):
        if self.state:
            self.image = self.mute_image
        else:
            self.image = self.unmute_image

mute_unmute_button = MuteUnmuteButton()

while Loop:
    for event in pygame.event.get():
        if event.type == MOUSEBUTTONDOWN:
            if event.button == 1:
                if mute_unmute_button.checkCollision():
                    if mute_unmute_button.state:
                        mute_unmute_button.state = False
                        mute_unmute_button.changeImage()
                        pygame.mixer.music.pause()
                    else:
                        mute_unmute_button.state = True
                        mute_unmute_button.changeImage()
                        pygame.mixer.music.unpause()
    screen.fill((255,255,255)) #Fills background
    mute_unmute_button.redraw()
    pygame.display.flip()

我举了一个例子，你可以改变你的程序的代码。