Pygame：即使实际歌曲没有完成，也强制播放队列中的下一首歌曲？(又名"Next"按钮)

Question

我想用pygame制作与随身听相同的功能：播放，暂停，排队都可以。但是如何做上一个/下一个按钮？

我如何使用pygame强制播放已排队的下一首歌曲(并通过实际正在播放的ong？

Answer 1

有一个歌曲标题列表，并使用变量跟踪您在列表中的位置。无论您使用的是pygame.mixer.music还是pygame.mixer.Sound，当单击"下一步"按钮时，只需将变量更改一个，然后停止歌曲，并让变量对应的歌曲播放即可。

pygame.mixer.Sound的代码示例：

#setup pygame above this
#load sounds
sound1 = pygame.mixer.Sound("soundone.ogg")
sound2 = pygame.mixer.Sound("soundtwo.ogg")
queue = [sound1, sound2] #note that the list holds the sounds, not strings
var = 0
sound1.play()
while 1:
    if next(): #whatever the next button trigger is
        queue[var].stop() # stop current song
        if var == len(queue - 1): # if it's the last song
            var = 0 # set the var to represent the first song
        else:
            var += 1 # else, next song
        queue[var].play() # play the song var corresponds to

Answer 2

这是我为自己工作的一个例子，以围绕程序的行为进行思考。

from os import environ
environ['PYGAME_HIDE_SUPPORT_PROMPT'] = '1'  # noqa This is used to hide the default pygame import print statement.
import pygame
import time
# Credit: https://forums.raspberrypi.com/viewtopic.php?t=102008
pygame.mixer.init()
pygame.display.init()
screen = pygame.display.set_mode((420, 240))  # Shows PyGame Window.
playlist = list()
playlist.append('/Music/Tom MacDonald - Angels (Explicit).mp3')
playlist.append('/Music/Falling In Reverse - Bad Girls Club (Explicit).mp3')
pygame.mixer.music.load(playlist.pop())               # Get the first track from the playlist
pygame.mixer.music.queue(playlist.pop())              # Queue the 2nd song
pygame.mixer.music.set_endevent(pygame.USEREVENT)     # Setup the end track event
pygame.mixer.music.play()                             # Play the music
running = True
while running:
    time.sleep(.1)
    for event in pygame.event.get():
        if event.type == pygame.USEREVENT:                # A track has ended
            if len(playlist) > 0:                         # If there are more tracks in the queue...
                pygame.mixer.music.queue(playlist.pop())  # Queue the next one in the list
        elif event.type == pygame.QUIT:                   # Create a way to exit the program.
            running = False