大家好，歡迎來(lái)到 Crossin的編程教室 ！今天給大家分享一個(gè)迷你項(xiàng)目案例：利用Python制作一款簡(jiǎn)易音樂(lè)播放器。這個(gè)程序具有一定的實(shí)用性，用到的技術(shù)也不算復(fù)雜，可以作為完成基礎(chǔ)學(xué)習(xí)后的練手項(xiàng)目。安裝Python并添加到環(huán)境變量，pip安裝相關(guān)模塊： 先睹為快 在cmd窗口運(yùn)行'MusicPlayer.py'文件即可。 
界面設(shè)計(jì)的比較簡(jiǎn)約，大概長(zhǎng)這個(gè)樣子： 源代碼里一個(gè)個(gè)地定義界面包含的元素，然后排版一下就行了：# 界面元素# --播放時(shí)間self.label1 = QLabel('00:00')self.label1.setStyle(QStyleFactory.create('Fusion'))self.label2 = QLabel('00:00')self.label2.setStyle(QStyleFactory.create('Fusion'))# --滑動(dòng)條self.slider = QSlider(Qt.Horizontal, self)self.slider.sliderMoved[int].connect(lambda: self.player.setPosition(self.slider.value()))self.slider.setStyle(QStyleFactory.create('Fusion'))# --播放按鈕self.play_button = QPushButton('播放', self)self.play_button.clicked.connect(self.playMusic)self.play_button.setStyle(QStyleFactory.create('Fusion'))# --上一首按鈕self.preview_button = QPushButton('上一首', self)self.preview_button.clicked.connect(self.previewMusic)self.preview_button.setStyle(QStyleFactory.create('Fusion'))# --下一首按鈕self.next_button = QPushButton('下一首', self)self.next_button.clicked.connect(self.nextMusic)self.next_button.setStyle(QStyleFactory.create('Fusion'))# --打開(kāi)文件夾按鈕self.open_button = QPushButton('打開(kāi)文件夾', self)self.open_button.setStyle(QStyleFactory.create('Fusion'))self.open_button.clicked.connect(self.openDir)# --顯示音樂(lè)列表self.qlist = QListWidget()self.qlist.itemDoubleClicked.connect(self.doubleClicked)self.qlist.setStyle(QStyleFactory.create('windows'))# --如果有初始化setting, 導(dǎo)入settingself.loadSetting()# --播放模式self.cmb = QComboBox()self.cmb.setStyle(QStyleFactory.create('Fusion'))self.cmb.addItem('順序播放')self.cmb.addItem('單曲循環(huán)')self.cmb.addItem('隨機(jī)播放')# --計(jì)時(shí)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）存放音樂(lè)的文件夾選取 直接調(diào)pyqt5相應(yīng)的函數(shù)就行： '''打開(kāi)文件夾'''def openDir(self): self.cur_path = QFileDialog.getExistingDirectory(self, '選取文件夾', 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')
打開(kāi)文件夾后把所有的音樂(lè)文件顯示在界面左側(cè)，并保存一些必要的信息：
'''顯示文件夾中所有音樂(lè)'''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）音樂(lè)播放 音樂(lè)播放功能直接調(diào)用QMediaPlayer實(shí)現(xiàn)： '''播放音樂(lè)'''def playMusic(self): if self.qlist.count() == 0: self.Tips('當(dāng)前路徑內(nèi)無(wú)可播放的音樂(lè)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('暫停') elif (not self.is_pause) and (not self.is_switching): self.player.pause() self.is_pause = True self.play_button.setText('播放')
點(diǎn)擊上一首/下一首按鈕切換： '''上一首'''def previewMusic(self): self.slider.setValue(0) if self.qlist.count() == 0: self.Tips('當(dāng)前路徑內(nèi)無(wú)可播放的音樂(lè)文件') return pre_row = self.qlist.currentRow()-1 if self.qlist.currentRow() != 0 else self.qlist.count() - 1 self.qlist.setCurrentRow(pre_row) self.is_switching = True self.setCurPlaying() self.playMusic() self.is_switching = False'''下一首'''def nextMusic(self): self.slider.setValue(0) if self.qlist.count() == 0: self.Tips('當(dāng)前路徑內(nèi)無(wú)可播放的音樂(lè)文件') return next_row = self.qlist.currentRow() 1 if self.qlist.currentRow() != self.qlist.count()-1 else 0 self.qlist.setCurrentRow(next_row) self.is_switching = True self.setCurPlaying() self.playMusic() self.is_switching = False
雙擊某首歌切換：
'''雙擊播放音樂(lè)'''def doubleClicked(self): self.slider.setValue(0) self.is_switching = True self.setCurPlaying() self.playMusic() self.is_switching = False
根據(jù)播放模式切換：
'''根據(jù)播放模式播放音樂(lè)'''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))) # 順序播放 if (self.cmb.currentIndex() == 0) and (not self.is_pause) and (not self.is_switching): if self.qlist.count() == 0: return if self.player.position() == self.player.duration(): self.nextMusic() # 單曲循環(huán) elif (self.cmb.currentIndex() == 1) and (not self.is_pause) and (not self.is_switching): if self.qlist.count() == 0: return if self.player.position() == self.player.duration(): self.is_switching = True self.setCurPlaying() self.slider.setValue(0) self.playMusic() self.is_switching = False # 隨機(jī)播放 elif (self.cmb.currentIndex() == 2) and (not self.is_pause) and (not self.is_switching): if self.qlist.count() == 0: return if self.player.position() == self.player.duration(): self.is_switching = True self.qlist.setCurrentRow(random.randint(0, self.qlist.count()-1)) self.setCurPlaying() self.slider.setValue(0) self.playMusic() self.is_switching = False
All done~整體來(lái)說(shuō)還是比較簡(jiǎn)單的，大家可以參考代碼中的注釋進(jìn)行理解。
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