如何解决PyQt5 Cant链接滑块可播放mp3播放器中的音频
我正在制作Mp3播放器，我快完成了，剩下的唯一事情就是时间滑块。
我设法制作了滑块，以便它可以更改音频的位置/时间，但现在我希望反之亦然，即随着音频进度移动滑块。
（忽略此信息，他们要求提供更多详细信息，但我无话可说，谢谢）
我的MRE：
import os
import vlc # version 3.0.10114
from PyQt5 import QtCore,QtGui,QtWidgets
from tkinter import Tk,filedialog # 8.6
from time import sleep
from pygame import mixer # version 1.9.6
class UiMainWindow:
def __init__(self,main_window):
self.main_window = main_window
mixer.init() # For the volume
self.vlc_instance = vlc.Instance()
media = self.vlc_instance.media_new('')
self.player = self.vlc_instance.media_player_new()
self.player.set_media(media)
self.main_window.setStyleSheet('background-color: gray')
self.main_window.resize(800,600)
self.centralwidget = QtWidgets.QWidget(self.main_window)
# Initiating the buttons and labels
self.add_new_song_button = QtWidgets.QPushButton(self.centralwidget)
self.add_new_song_button.setGeometry(QtCore.QRect(690,50,80,24))
self.add_new_song_button.clicked.connect(self.add_song)
self.time_slider = QtWidgets.QSlider(self.centralwidget)
self.time_slider.setMinimum(0)
self.time_slider.setMaximum(10000)
self.time_slider.setValue(0)
self.time_slider.setSingleStep(1)
self.time_slider.setOrientation(QtCore.Qt.Horizontal)
self.time_slider.sliderMoved.connect(self.slider_moved)
# self.time_slider.valueChanged.connect(self.slider_changed)
self.time_slider.setGeometry(QtCore.QRect(200,400,20))
# Initiating the lists and music
self.ui_song_list = QtWidgets.QListWidget(self.centralwidget)
self.ui_song_list.setGeometry(QtCore.QRect(10,120,780,480))
self.ui_song_list.setEnabled(True)
self.ui_song_list.setStyleSheet('background-color: lightblue;')
self.current_audio = '' # To prevent errors when trying to play nothing
self.audio_paths = {}
self.ui_song_list.itemClicked.connect(self.play_song)
self.retranslate_ui(self.main_window)
QtCore.QMetaObject.connectSlotsByName(self.main_window)
def config_audio(self,audio=''): # Changes the song of the player
if not audio:
media = self.vlc_instance.media_new(audio)
else:
media = self.vlc_instance.media_new(self.audio_paths[audio])
self.player = self.vlc_instance.media_player_new()
self.player.set_media(media)
def play_song(self,song): # This is called when a song is clicked
self.current_audio = song.text()
self.player.stop()
self.config_audio(audio=self.current_audio)
self.player.play()
def add_song(self):
Tk().withdraw() # Creating the interface for choosing songs
filetypes = [('mp3 files','*.mp3'),('wav files','*.wav')] # Only audio should pe added
list_of_chosen_audio = filedialog.askopenfilenames(title='Choose audio files',filetypes=filetypes)
for audio_path in list_of_chosen_audio:
audio_name = audio_path[:-4].split('/')[-1] # taking only the audio name without mp3 and audio_paths
self.audio_paths[audio_name] = audio_path
self.ui_song_list.addItem(audio_name)
self.all_songs = self.ui_song_list.findItems('',QtCore.Qt.MatchContains)
def slider_moved(self):
try:
self.player.set_position(self.time_slider.value()/10000) # / 10000 because the slider didnt work if lowered the maximum value
except Exception as e:
print(e)
def slider_changed(self):
if self.player.is_playing():
print(round(self.player.get_position()*10000,2))
self.time_slider.setValue(round(self.player.get_position()*10000,2))
self.player.set_position(self.time_slider.value()/10000)
def retranslate_ui(self,main_window): # Setting the text for all the buttons and labels
main_window.setCentralWidget(self.centralwidget)
main_window.setWindowTitle("MP3 Player")
self.add_new_song_button.setText("Add Songs")
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = UiMainWindow(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
谢谢！
解决方法
滑块具有setValue来设置滑块位置（0-1）。要更新滑块，请向应用添加计时器。
通过以下更改更新代码：
class UiMainWindow:
def __init__(self,main_window):
..........
# timer to update slide bar
timer = QTimer(self.main_window)
timer.timeout.connect(self.time_hit)
timer.start(500) # 1/2 second
def time_hit(self):
if self.player.is_playing():
self.time_slider.setValue(self.player.get_position()*10000) # update slide bar
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