检查一首歌是否在 pygame 中结束

如何解决检查一首歌是否在 pygame 中结束

我正在尝试使用 Tkinter 和 PyGame（它是音乐模块）创建 MP3 播放器。我写了一个方法来检查歌曲是否播放完毕，但问题是程序本身在其中循环，我不知道如何以不同的方式实现它。有没有其他方法可以做到这一点？

    self.soNG_END = pygame.USEREVENT
    pygame.mixer.music.set_endevent(self.soNG_END)

    def __wait_for_song_to_end(self):
        while True:
            for event in pygame.event.get():
                if event.type == self.soNG_END:
                    self.__queue_song()
                    self.__set_new_selection() #works with listBox
                    break

更新
以下是相关方法的代码：

    # Gets called when the 'play' button gets pressed
    def play_song(self):
        if not pygame.mixer.music.get_busy() and self.isPaused:
            pygame.mixer.music.unpause()
            self.isPaused = False
            self.btn_pause.config(image=self.img_pause)
            return

        if len(self.playlist.songsFullPath) > 0:
            # Getting song's full path
            for path in self.playlist.songsFullPath:
                if path.find(self.playlist.songsList.get(tk.ACTIVE)) != -1:
                    self.playlist.currentSongName = path
                    self.playlist.currentSongIndex = self.playlist.songsList.curselection()[0]
                    break

            # Loading the song into the mixer
            pygame.mixer.music.load(self.playlist.currentSongName)

            # Playing the song
            pygame.mixer.music.play(loops=0)
            self.songIsLoaded = True

    def __queue_song(self):
        if self.isOnRepeat:
            pygame.mixer.music.queue(self.playlist.currentSongName)
            return

        if self.playlist.songsListSize > 1 and self.playlist.currentSongIndex < self.playlist.songsListSize - 1:
            queuedSong = self.playlist.songsFullPath[self.playlist.songsList.curselection()[0] + 1]
            self.playlist.currentSongIndex += 1
            pygame.mixer.music.queue(queuedSong)

解决方法

我推荐阅读Tkinter understanding mainloop。

不要等待歌曲完成，不断检查是否已完成。在主循环中添加一个事件循环并在 SONG_END 事件发生时设置一个状态变量：

song_end = False

在主循环中：

for event in pygame.event.get():
    if event.type == self.SONG_END:
        song_end = True

if song_end:
    # [...]

,

您可以做的是，使用 root.after() 调用该函数，以便不断检查该函数是否已结束歌曲。

import pygame 

# Same codes and imports
root = Tk() # Don't forget this
pygame.init() # Use this instead of pygame.mixer.init() as you need event
...

def check_event():
    for event in pygame.event.get():
        if event.type == MUSIC_END:
            play() # In your case,run self.__queue_song() and self.__set_new_selection()
    root.after(100,check_event) # Repeat this function every 0.1 second

MUSIC_END = pygame.USEREVENT+1
pygame.mixer.music.set_endevent(MUSIC_END)

play() # Play the first random song
check_event() # Start checking for the end of song

如果你能提供更相关的代码，那么我可以举一个更好的例子。目前，您应该能够重写它以适应您的代码。