Python制作一款简易音乐播放器
安装Python并添加到环境变量，pip安装相关模块：
pip install pyqt5先睹为快
在cmd窗口运行'MusicPlayer.py'文件即可。
原理简介
一、设计界面
界面设计的比较简约，大概长这个样子：
# 界面元素# --播放时间self.label1 = QLabel('00:00')self.label1.setStyle(QStyleFactory.create('Fusion'))self.label2 = QLabel('00:00')self.label2.setStyle(QStyleFactory.create('Fusion'))# --滑动条self.slider = QSlider(Qt.Horizontal, self)self.slider.sliderMoved[int].connect(lambda: self.player.setPosition(self.slider.value()))self.slider.setStyle(QStyleFactory.create('Fusion'))# --播放按钮self.play_button = QPushButton('播放', self)self.play_button.clicked.connect(self.playMusic)self.play_button.setStyle(QStyleFactory.create('Fusion'))# --上一首按钮self.preview_button = QPushButton('上一首', self)self.preview_button.clicked.connect(self.previewMusic)self.preview_button.setStyle(QStyleFactory.create('Fusion'))# --下一首按钮self.next_button = QPushButton('下一首', self)self.next_button.clicked.connect(self.nextMusic)self.next_button.setStyle(QStyleFactory.create('Fusion'))# --打开文件夹按钮self.open_button = QPushButton('打开文件夹', self)self.open_button.setStyle(QStyleFactory.create('Fusion'))self.open_button.clicked.connect(self.openDir)# --显示音乐列表self.qlist = QListWidget()self.qlist.itemDoubleClicked.connect(self.doubleClicked)self.qlist.setStyle(QStyleFactory.create('windows'))# --如果有初始化setting, 导入settingself.loadSetting()# --播放模式self.cmb = QComboBox()self.cmb.setStyle(QStyleFactory.create('Fusion'))self.cmb.addItem('顺序播放')self.cmb.addItem('单曲循环')self.cmb.addItem('随机播放')# --计时器self.timer = QTimer(self)self.timer.start(1000)self.timer.timeout.connect(self.playByMode)# 界面布局self.grid = QGridLayout()self.setLayout(self.grid)self.grid.addWidget(self.qlist, 0, 0, 5, 10)self.grid.addWidget(self.label1, 0, 11, 1, 1)self.grid.addWidget(self.slider, 0, 12, 1, 1)self.grid.addWidget(self.label2, 0, 13, 1, 1)self.grid.addWidget(self.play_button, 0, 14, 1, 1)self.grid.addWidget(self.next_button, 1, 11, 1, 2)self.grid.addWidget(self.preview_button, 2, 11, 1, 2)self.grid.addWidget(self.cmb, 3, 11, 1, 2)self.grid.addWidget(self.open_button, 4, 11, 1, 2)
（1）存放音乐的文件夹选取
直接调pyqt5相应的函数就行：
'''打开文件夹'''def openDir(self): self.cur_path = QFileDialog.getExistingDirectory(self, '选取文件夹', self.cur_path) if self.cur_path: self.showMusicList() self.cur_playing_song = '' self.setCurPlaying() self.label1.setText('00:00') self.label2.setText('00:00') self.slider.setSliderPosition(0) self.is_pause = True self.play_button.setText('播放')打开文件夹后把所有的音乐文件显示在界面左侧，并保存一些必要的信息：
'''显示文件夹中所有音乐'''def showMusicList(self):self.qlist.clear()self.updateSetting()for song in os.listdir(self.cur_path):if song.split('.')[-1] in self.song_formats:self.songs_list.append([song, os.path.join(self.cur_path, song).replace('\\', '/')])self.qlist.addItem(song)self.qlist.setCurrentRow(0)if self.songs_list:self.cur_playing_song = self.songs_list[self.qlist.currentRow()][-1]
（2）音乐播放
音乐播放功能直接调用QMediaPlayer实现：
'''播放音乐'''def playMusic(self): if self.qlist.count() == 0: self.Tips('当前路径内无可播放的音乐文件') return if not self.player.isAudioAvailable(): self.setCurPlaying() if self.is_pause or self.is_switching: self.player.play() self.is_pause = False self.play_button.setText('暂停') elif (not self.is_pause) and (not self.is_switching): self.player.pause() self.is_pause = True self.play_button.setText('播放')（3）音乐切换
点击上一首/下一首按钮切换：
'''上一首'''def previewMusic(self):self.slider.setValue(0)if self.qlist.count() == 0:self.Tips('当前路径内无可播放的音乐文件')returnpre_row = self.qlist.currentRow()-1 if self.qlist.currentRow() != 0 else self.qlist.count() - 1self.qlist.setCurrentRow(pre_row)self.is_switching = Trueself.setCurPlaying()self.playMusic()self.is_switching = False'''下一首'''def nextMusic(self):self.slider.setValue(0)if self.qlist.count() == 0:self.Tips('当前路径内无可播放的音乐文件')returnnext_row = self.qlist.currentRow() 1 if self.qlist.currentRow() != self.qlist.count()-1 else 0self.qlist.setCurrentRow(next_row)self.is_switching = Trueself.setCurPlaying()self.playMusic()self.is_switching = False
双击某首歌切换：
'''双击播放音乐'''def doubleClicked(self): self.slider.setValue(0) self.is_switching = True self.setCurPlaying() self.playMusic() self.is_switching = False根据播放模式切换：
'''根据播放模式播放音乐'''def playByMode(self):if (not self.is_pause) and (not self.is_switching):self.slider.setMinimum(0)self.slider.setMaximum(self.player.duration())self.slider.setValue(self.slider.value() 1000)self.label1.setText(time.strftime('%M:%S', time.localtime(self.player.position()/1000)))self.label2.setText(time.strftime('%M:%S', time.localtime(self.player.duration()/1000)))# 顺序播放if (self.cmb.currentIndex() == 0) and (not self.is_pause) and (not self.is_switching):if self.qlist.count() == 0:returnif self.player.position() == self.player.duration():self.nextMusic()# 单曲循环elif (self.cmb.currentIndex() == 1) and (not self.is_pause) and (not self.is_switching):if self.qlist.count() == 0:returnif self.player.position() == self.player.duration():self.is_switching = Trueself.setCurPlaying()self.slider.setValue(0)self.playMusic()self.is_switching = False# 随机播放elif (self.cmb.currentIndex() == 2) and (not self.is_pause) and (not self.is_switching):if self.qlist.count() == 0:returnif self.player.position() == self.player.duration():self.is_switching = Trueself.qlist.setCurrentRow(random.randint(0, self.qlist.count()-1))self.setCurPlaying()self.slider.setValue(0)self.playMusic()self.is_switching = False
代码文件
作者：Charles未晞
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