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自己用python做的一款超炫酷音樂播放器

前言

晚上坐在電腦面前，想著一邊擼代碼，一邊聽音樂。搜了搜自己想聽的歌，奈何好多歌曲都提示需要版權，無法播放！

沒辦法，想聽歌還是得靠自己解決！今天就一起用python自制一款炫酷的音樂播放器吧~

首先一起來看看最終實現的音樂播放器效果：

下面，我們開始介紹這個音樂播放器的制作過程。

一、核心功能設計

總體來說，我們首先需要設計UI界面，對播放器的畫面布局進行排版設計；其次我們的這款音樂播放器的主要功能包括根據關鍵字搜索自動爬取音樂，獲取音樂列表，能進行音樂播放。

當然還少不了一些附加功能，例如播放方式列表循環、單曲循環、隨機播放，當前上一首下一首播放，播放暫停開始，音量增加減少，播放歷史查看等。

拆解需求，大致可以整理出核心功能如下：

UI設計排版布局

頭部主要包括關鍵字搜索和音樂來源選擇，以及窗體最小化，最大化，關閉功能
中間主體包含左右兩側，左側用來顯示播放音樂封面圖，右側用來進行音樂列表顯示
底部主要來顯示當前播放音樂，播放進度條，音量控制，上一首/下一首，暫停/開始，播放方式等附加功能

關鍵字音樂列表爬蟲

通過輸入的搜索關鍵字和選擇的音樂來源，自動爬取對應的音樂數據
將爬取獲取的音樂名進行列表顯示，顯示在中間主體搜索頁

音樂播放

音樂列表中我們需要雙擊某一首歌，對爬取的歌曲封面圖和歌曲進行下載
下載成功，對音樂文件根據播放進度條進行播放

附加功能

播放音樂時，我們還需要有播放暫停和啟動功能
音量控制提高或者降低
當前播放歌曲上一首、下一首
音樂列表播放方式，列表循環、單曲循環、隨機播放

二、實現步驟

1. UI設計排版布局

基于功能點，我們首先考慮進行簡單的UI布局設計，這里我們使用的是pyqt5。核心設計代碼如下：

def init_ui(self):
    global type
    self.setFixedSize(1025, 750)
    self.main_widget = QWidget()  # 創建窗口主部件
    self.main_layout = QGridLayout()  # 創建主部件的網格布局
    self.main_widget.setLayout(self.main_layout)  # 設置窗口主部件布局為網格布局

    self.close_widget = QWidget()  # 創建關閉側部件
    self.close_widget.setObjectName('close_widget')
    self.close_layout = QGridLayout()  # 創建左側部件的網格布局層
    self.close_widget.setLayout(self.close_layout)  # 設置左側部件布局為網格

    self.left_widget = QWidget()  # 創建左邊側部件
    self.left_widget.setObjectName('left_widget')
    self.left_layout = QGridLayout()  # 創建左側部件的網格布局層
    self.left_widget.setLayout(self.left_layout)  # 設置左側部件布局為網格

    self.right_widget = QWidget()  # 創建右側部件
    self.right_widget.setObjectName('right_widget')
    self.right_layout = QGridLayout()
    self.right_widget.setLayout(self.right_layout)  # 設置右側部件布局為網格

    self.down_widget = QWidget()  # 創建下面部件
    self.down_widget.setObjectName('down_widget')
    self.down_layout = QGridLayout()
    self.down_widget.setLayout(self.down_layout)  # 設置下側部件布局為網格

    self.up_widget = QWidget()  # 創建下面部件
    self.up_widget.setObjectName('up_widget')
    self.up_layout = QGridLayout()
    self.up_widget.setLayout(self.up_layout)  # 設置下側部件布局為網格

    self.label = QLabel(self)
    self.label.setText("還沒有播放歌曲呢╰(*°▽°*)╯")
    self.label.setStyleSheet("color:white")
    self.label.setMaximumSize(310, 20)

    self.main_layout.addWidget(self.up_widget, 0, 0, 1, 115)

    self.main_layout.addWidget(self.left_widget, 1, 0, 90, 25)
    self.main_layout.addWidget(self.right_widget, 1, 25, 90, 90)  # 22右側部件在第0行第3列，占8行9列
    self.main_layout.addWidget(self.down_widget, 100, 0, 10, 115)
    self.main_layout.addWidget(self.close_widget, 0, 110, 1, 5)  # 左側部件在第0行第0列，占1行3列

    self.down_layout.addWidget(self.label, 1, 0, 1, 1)
    self.setCentralWidget(self.main_widget)  # 設置窗口主部件

    self.tabWidget = QTabWidget(self)
    self.tabWidget.setGeometry(QRect(33, 20, 716, 471))
    self.tab = QWidget()
    self.tab.setObjectName("tab")
    self.tab_layout = QGridLayout()
    self.tab.setLayout(self.tab_layout)
    self.listwidget = QListWidget(self.tab)
    self.listwidget.doubleClicked.connect(lambda: self.change_func(self.listwidget))
    self.listwidget.setContextMenuPolicy(Qt.CustomContextMenu)
    self.listwidget.customContextMenuRequested[QPoint].connect(self.myListWidgetContext)
    self.listwidget.setObjectName("listWidget")
    self.tab_layout.addWidget(self.listwidget, 0, 0, 1, 1)
    self.tabWidget.addTab(self.tab, "      搜索頁      ")

    self.tab2 = QWidget()
    self.tab2.setObjectName("tab")
    self.tab2_layout = QGridLayout()
    self.tab2.setLayout(self.tab2_layout)
    self.listwidget2 = QListWidget(self.tab2)
    self.listwidget2.doubleClicked.connect(lambda: self.change_funcse(self.listwidget2))
    self.listwidget2.setContextMenuPolicy(Qt.CustomContextMenu)
    self.listwidget2.customContextMenuRequested[QPoint].connect(self.myListWidgetContext2)
    self.listwidget2.setObjectName("listWidget2")
    self.listwidget2.setContextMenuPolicy(3)
    self.tab2_layout.addWidget(self.listwidget2, 0, 0, 1, 1)
    self.tabWidget.addTab(self.tab2, "      最近播放      ")

    self.right_layout.addWidget(self.tabWidget, 3, 0, 100, 90)

    self.left_close = QPushButton("")  # 關閉按鈕
    self.left_close.clicked.connect(self.close)
    self.left_visit = QPushButton("")  # 空白按鈕
    self.left_visit.clicked.connect(self.big)
    self.left_mini = QPushButton("")  # 最小化按鈕
    self.left_mini.clicked.connect(self.mini)
    self.close_layout.addWidget(self.left_mini, 0, 0, 1, 1)
    self.close_layout.addWidget(self.left_close, 0, 2, 1, 1)
    self.close_layout.addWidget(self.left_visit, 0, 1, 1, 1)
    self.left_close.setFixedSize(15, 15)  # 設置關閉按鈕的大小
    self.left_visit.setFixedSize(15, 15)  # 設置按鈕大小
    self.left_mini.setFixedSize(15, 15)  # 設置最小化按鈕大小
    self.left_close.setStyleSheet(
        '''QPushButton{background:#F76677;border-radius:5px;}QPushButton:hover{background:red;}''')
    self.left_visit.setStyleSheet(
        '''QPushButton{background:#F7D674;border-radius:5px;}QPushButton:hover{background:yellow;}''')
    self.left_mini.setStyleSheet(
        '''QPushButton{background:#6DDF6D;border-radius:5px;}QPushButton:hover{background:green;}''')


    self.button_123 = QLabel("")
    self.left_layout.addWidget(self.button_123, 0, 2, 2, 2)
    self.label2 = QLabel(self)
    self.label2.setText("當前為順序播放")
    self.label2.setStyleSheet("color:green")
    self.left_layout.addWidget(self.label2, 4, 0, 2, 1)
    self.button_1234 = QPushButton(icon('fa.download', color='#3FC89C', font=24), "")
    self.button_1234.clicked.connect(self.down)
    self.button_1234.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')
    self.left_layout.addWidget(self.button_1234, 4, 2, 2, 1)
    self.button_1234 = QPushButton(icon('fa.heart', color='#3FC89C', font=24), "")
    self.button_1234.clicked.connect(self.lovesong)
    self.button_1234.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')
    self.left_layout.addWidget(self.button_1234, 4, 3, 2, 2)
    self.label3 = QLabel(self)
    self.label3.setText("")
    self.label3.setStyleSheet("color:white")
    self.down_layout.addWidget(self.label3, 1, 3, 1, 1)

    self.label7 = QLabel(self)
    self.label7.setText("")
    self.label7.setStyleSheet("color:white")
    self.label5 = QLabel(self)
    pix_img = QPixmap(str(data + '/backdown.png'))
    pix = pix_img.scaled(300, 300, Qt.KeepAspectRatio)
    self.label5.setPixmap(pix)
    # self.label5.setMaximumSize(1,1)
    self.left_layout.addWidget(self.label5, 2, 0, 2, 8)
    self.label6 = QLabel(self)
    self.label6.setText("")
    self.label6.setStyleSheet("color:#6DDF6D")
    self.left_layout.addWidget(self.label6, 2, 0, 2, 2)

    self.label23 = QLabel(self)
    self.label23.setText("                 ")
    self.label23.setStyleSheet("color:#6DDF6D")
    self.up_layout.addWidget(self.label23, 0, 100, 1, 20)

    self.shuru = QLineEdit("")
    self.up_layout.addWidget(self.shuru, 0, 120, 1, 40)
    self.shuru.returnPressed.connect(self.correct)

    self.label23 = QLabel(self)
    self.label23.setText("     軟件")
    self.label23.setStyleSheet("color:#6DDF6D")
    self.up_layout.addWidget(self.label23, 0, 160, 1, 10)

    self.label61 = QLabel(self)
    self.label61.setText("")
    self.label61.setStyleSheet("color:#6DDF6D")
    self.up_layout.addWidget(self.label61, 0, 200, 1, 50)

    self.cb = QComboBox(self)
    self.cb.addItems(['網易云', '酷狗',  'qq'])
    self.up_layout.addWidget(self.cb, 0, 180, 1, 30)
    self.cb.currentIndexChanged[int].connect(self.print)
    self.button_1 = QPushButton(icon('fa.search', color='white'), "")
    self.button_1.clicked.connect(self.correct)
    self.button_1.setStyleSheet(
        '''
        QPushButton{color:white;border-radius:5px;}QPushButton:hover{background:green;}
        ''')
    self.up_layout.addWidget(self.button_1, 0, 155, 1, 5)

    self.right_process_bar = QProgressBar()  # 播放進度部件
    self.right_process_bar.setValue(49)
    self.right_process_bar.setFixedHeight(3)  # 設置進度條高度
    self.right_process_bar.setTextVisible(False)  # 不顯示進度條文字
    self.right_process_bar.setRange(0, 10000)

    self.right_playconsole_widget = QWidget()  # 播放控制部件
    self.right_playconsole_layout = QGridLayout()  # 播放控制部件網格布局層
    self.right_playconsole_widget.setLayout(self.right_playconsole_layout)

    self.console_button_1 = QPushButton(icon('fa.backward', color='#3FC89C'), "")
    self.console_button_1.clicked.connect(self.last)
    self.console_button_1.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')

    self.console_button_2 = QPushButton(icon('fa.forward', color='#3FC89C'), "")
    self.console_button_2.clicked.connect(self.nextion)
    self.console_button_2.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')

    self.console_button_3 = QPushButton(icon('fa.pause', color='#3FC89C', font=18), "")
    self.console_button_3.clicked.connect(self.pause)
    self.console_button_3.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')

    self.console_button_4 = QPushButton(icon('fa.volume-down', color='#3FC89C', font=18), "")
    self.console_button_4.clicked.connect(self.voicedown)
    self.console_button_4.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')

    self.console_button_5 = QPushButton(icon('fa.volume-up', color='#3FC89C', font=18), "")
    self.console_button_5.clicked.connect(self.voiceup)
    self.console_button_5.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')

    self.console_button_6 = QPushButton(icon('fa.align-center', color='#3FC89C', font=18), "")
    self.console_button_6.clicked.connect(self.playmode)
    self.console_button_6.setStyleSheet(
        '''QPushButton{background:#222225;border-radius:5px;}QPushButton:hover{background:#3684C8;}''')

    self.console_button_3.setIconSize(QSize(30, 30))

    self.right_playconsole_layout.addWidget(self.console_button_4, 0, 0)

    self.right_playconsole_layout.addWidget(self.console_button_1, 0, 1)
    self.right_playconsole_layout.addWidget(self.console_button_3, 0, 2)

    self.right_playconsole_layout.addWidget(self.console_button_2, 0, 3)

    self.right_playconsole_layout.addWidget(self.console_button_5, 0, 4)

    self.right_playconsole_layout.addWidget(self.console_button_6, 0, 5)
    self.right_playconsole_layout.setAlignment(Qt.AlignCenter)  # 設置布局內部件居中顯示
    self.down_layout.addWidget(self.right_process_bar, 0, 0, 1, 4)  # 第0行第0列，占8行3列
    # 第0行第0列，占8行3列
    self.down_layout.addWidget(self.label7, 1, 2, 1, 1)
    self.down_layout.addWidget(self.right_playconsole_widget, 1, 0, 1, 4)
    self.setWindowOpacity(0.95)  # 設置窗口透明度
    self.setAttribute(Qt.WA_TranslucentBackground)
    self.setWindowFlag(Qt.FramelessWindowHint)  # 隱藏邊框
    self.main_layout.setSpacing(0)

實現效果如下：

2. 關鍵字音樂列表爬蟲

我們可以根據輸入的關鍵字和音樂來源進行音樂爬取。這里我們需要通過多線程，將歌曲、歌手、歌曲url地址全都獲取。核心代碼如下：

def run(self):
  qmut.lock()
  try:
      global paing
      global stop
      global lrcs
      global urls
      global songs
      global name
      global songid
      global proxies
      global pic
      global tryed
      paing = True

      print('搜索軟件{}'.format(type))
      print('開始搜索')
      name = name
      headers = {
          'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.110.430.128 Safari/537.36',
          'X-Requested-With': 'XMLHttpRequest'

      }
      urls = []
      songs = []
      pic = []
      lrcs = []
      pages = 5
      print(pages)
      for a in range(0, pages):
          if not stop:

              urlss = ['http://music.9q4.cn/', 'https://defcon.cn/dmusic/','http://www.xmsj.org/',
                      'http://music.laomao.me/']
              print (tryed)
              if tryed >3:

                  tryed = 0
                  url = urlss[tryed]
              else:
                  url = urlss[tryed]
              print (urlss[tryed])

              params = {'input': name,
                        'filter': 'name',
                        'type': type,
                        'page': a
                        }
              if not stop:
                  try:
                      res = post(url, params, headers=headers, proxies=proxies)
                      html = res.json()

                      for i in range(0, 10):

                              try:
                                  title = jsonpath(html, '$..title')[i]
                                  author = jsonpath(html, '$..author')[i]
                                  url1 = jsonpath(html, '$..url')[i]  # 取下載網址
                                  pick = jsonpath(html, '$..pic')[i]  # 取歌詞
                                  lrc = jsonpath(html, '$..lrc')[i]
                                  print(title, author)
                                  lrcs.append(lrc)
                                  urls.append(url1)
                                  pic.append(pick)
                                  songs.append(str(title) + ' - ' + str(author))
                              except:
                                  pass
                  except:
                      stop = False
                      paing = False
                  self.trigger.emit(str('finish'))
              else:
                  self.trigger.emit(str('finish'))
          else:
              self.trigger.emit(str('clear'))
              pass

      stop = False
      paing = False
  except:
      print('爬取歌曲出錯')
      self.trigger.emit(str('unfinish'))
      stop = False
      paing = False
  qmut.unlock()

爬取代碼寫好了，我們還需要將爬取的這些音樂數據列表顯示到畫面中搜索頁面中。代碼如下：

def repite(self, name, type):
    global tryed
    global paing
    global stop
    self.listwidget.clear()
    self.listwidget.addItem('搜索中')
    self.listwidget.item(0).setForeground(Qt.white)
    try:
        if paing:
            stop = True

            self.listwidget.clear()
            self.work2 = PAThread()
            self.work2.start()
            self.work2.trigger.connect(self.seafinish)
        else:
            self.work2 = PAThread()
            self.work2.start()
            self.work2.trigger.connect(self.seafinish)
    except:
        tryed = tryed + 1
        get_info('https://www.kuaidaili.com/free/inha')
        self.listwidget.addItem('貌似沒網了呀`(*>﹏*)′,再試一遍吧~')
        self.listwidget.item(0).setForeground(Qt.white)

效果如下：

3. 音樂播放

關鍵字搜索音樂列表完成之后，接下來我們需要實現音樂播放功能。首先需要從爬取的url下載待播放的歌曲，這里還是通過多線程進行。核心代碼如下：

class WorkThread(QThread):
    trigger = pyqtSignal(str)

    def __int__(self):
        # 初始化函數
        super(WorkThread, self).__init__()
    
    # 進度條
    def cbk(self, a, b, c):
        '''''回調函數
        @a:已經下載的數據塊
        @b:數據塊的大小
        @c:遠程文件的大小
        '''
        per = 100.0 * a * b / c
        if per > 100:
            per = 100
        # print   ('%.2f%%' % per)
        self.trigger.emit(str('%.2f%%' % per))

    def run(self):
        try:
            global number
            global path
            global downloading
                        try:
                proxies = {
                    'http': 'http://124.72.109.183:8118',
                    ' Shttp': 'http://49.85.1.79:31666'

                }
                headers = {
                    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36',
                    'X-Requested-With': 'XMLHttpRequest'}
                try:
                    try:
                        try:
                            aq = pic[num]
                            aqq = aq.split('/')

                        except:
                            pass

                        if type == 'kugou' and len(aqq) - 1 == 6:
                            aqqe = str(aqq[0]) + str('//') + str(aqq[2]) + str('/') + str(aqq[3]) + str('/') + str(
                                '400') + str('/') + str(aqq[5]) + str('/') + str(aqq[6])
                            print(aqqe)
                        elif type == 'netease' and len(aqq) - 1 == 4:
                            aqn = aq.split('?')
                            b = '?param=500x500'
                            aqqe = (str(aqn[0]) + str(b))
                            print(aqqe)
                        else:
                            aqqe = pic[num]
                        req = get(aqqe)

                        checkfile = open(str(data + '/ls1.png'), 'w+b')
                        for i in req.iter_content(100000):
                            checkfile.write(i)

                        checkfile.close()
                        lsfile = str(data + '/ls1.png')
                        safile = str(data + '/back.png')
                        draw(lsfile, safile)
                    except:
                        pass
                    url1 = urls[num]
                    print(url1)
                    number = number + 1
                    path = str(data + '\{}.臨時文件'.format(number))
                    headers = {
                        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.110.430.128 Safari/537.36',
                        'X-Requested-With': 'XMLHttpRequest'
                    }
                    with get(url1, stream=True, headers=headers) as r, open(path, 'wb') as file:
                        total_size = int(r.headers['content-length'])
                        content_size = 0
                        for content in r.iter_content(chunk_size=1024):
                            file.write(content)
                            content_size += len(content)
                            plan = (content_size / total_size) * 100
                            # print(int(plan))
                            develop = str(int(plan)) + str('%')
                            self.trigger.emit(str(develop))
                    to = 'downloadmusic\{}.mp3'.format(songs[num])
                    makedirs('downloadmusic', exist_ok=True)
                except:
                    pass
                try:
                    copyfile(path, to)
                except:
                    pass
                downloading = False
                self.trigger.emit(str('finish'))
            except:
                self.trigger.emit(str('nofinish'))

音樂播放模塊：

    def bofang(self, num, bo):
        print('嘗試進行播放')
        try:
            import urllib
            global pause
            global songs
            global music
            global downloading
            downloading = True
            self.console_button_3.setIcon(icon('fa.pause', color='#F76677', font=18))
            pause = False
            try:
                mixer.stop()
            except:
                pass
            mixer.init()
            try:
                self.Timer = QTimer()
                self.Timer.start(500)
            except:
                pass
            try:
                self.label.setText('正在尋找文件...')
                self.work = WorkThread()
                self.work.start()
                self.work.trigger.connect(self.display)
            except:
                print('無法播放，歌曲下載錯誤')
                downloading = False
                pass
        except:
            sleep(0.1)
            print('播放系統錯誤')
            # self.next()
            pass

    def display(self, sd):
        global pause
        global songed
        global urled
        global lrcd
        global timenum
        if sd == 'finish':
            try:
                if bo == 'boing':
                    self.label.setText(songs[num])
                elif bo == 'boed':
                    self.label.setText(songed[num])
                elif bo == 'love':
                    self.label.setText(loves[num])
                try:
                    pix_img = QPixmap(str(data + '/back.png'))
                    pix = pix_img.scaled(300, 300, Qt.KeepAspectRatio)
                    self.label5.setPixmap(pix)
                except:
                    pix_img = QPixmap(str(data + '/backdown.png'))
                    pix = pix_img.scaled(300, 300, Qt.KeepAspectRatio)
                    self.label5.setPixmap(pix)
                print(str(data + '\{}.臨時文件'.format(number)))
                mixer.music.load(str(data + '\{}.臨時文件'.format(number)))  # 載入音樂
                mixer.music.play()
                self.console_button_3.setIcon(icon('fa.pause', color='#F76677', font=18))
                pause = False
                try:
                    mp3 = str(data + '\{}.臨時文件'.format(number))
                    xx = load(mp3)
                    timenum = xx.info.time_secs
                    global start
                    start = True
                except:
                    print('MP3錯誤，播放失敗')

                if bo == 'boing':
                    songed.append(songs[num])
                    urled.append(urls[num])
                    picd.append(pic[num])
                    lrcd.append(lrcs[num])
                    r = 0
                    self.listwidget2.clear()
                    for i in songed:
                        # self.listwidget.addItem(i)#將文件名添加到listWidget

                        self.listwidget2.addItem(i)
                        self.listwidget2.item(r).setForeground(Qt.white)
                        r = r + 1
                else:
                    pass
                # 播放音樂
            except:
                pass
        elif sd == 'nofinish':
            self.label.setText('下載錯誤')
        elif sd == 'lrcfinish':
            r = 0
            for i in lrct:
                if not i == '\r':
                    r = r + 1
                else:
                    pass
        elif sd == 'lrcnofinish':
            pass
        else:
            self.label.setText('加速下載中,已完成{}'.format(sd))

至此，我們的音樂播放器已經可以正常播放音樂了。

4. 附加功能

主要功能已經完成了，下面我們還可以添加一些附加功能，例如播放方式列表循環、單曲循環、隨機播放，當前上一首下一首播放，播放暫停開始，音量增加減少等等。

播放模式：

（1）隨機播放：

def shui(self):
    global num
    global songs
    if bo == 'boing':
        q = int(len(songs) - 1)
        num = int(randint(1, q))
    elif bo == 'love':
        q = int(len(loves) - 1)
        num = int(randint(1, q))
    else:
        q = int(len(songed) - 1)
        num = int(randint(0, q))

    try:
        print('隨機播放下一首')
        mixer.init()
        self.Timer = QTimer()
        self.Timer.start(500)
        # self.Timer.timeout.connect(self.timercontorl)#時間函數，與下面的進度條和時間顯示有關
        if bo == 'boing':
            self.label.setText(songs[num])
        elif bo == 'love':
            self.label.setText(loves[num])
        else:
            self.label.setText(songed[num])
        self.bofang(num, bo)  # 播放音樂
    except:
        pass

（2）上一首、下一首：

def last(self):
    global num
    global songs
    if num == 0:
        print('冇')
        num = len(songs) - 1
    else:
        num = num - 1
    try:
        self.bofang(num)
        self.label.setText(songs[num])
    except:
        pass

#下一首
def next(self):
    print ('nexting')
    global num
    global songs
    if num == len(songs) - 1:
        print('冇')
        num = 0
    else:
        num = num + 1
    try:
        self.label.setText(songs[num])
        self.bofang(num)
    except:
        print ('next error')
        pass

（3）單曲循環：

def always(self):
    try:
        if bo == 'boing':
            self.label.setText(songs[num])
        else:
            self.label.setText(songed[num])
        self.bofang(num, bo)  # 播放音樂

    except:
        pass

（4）播放模式選擇：

def playmode(self):
    global play
    try:
        if play == 'shun':
            play = 'shui'
            print('切換到隨機播放')
            self.label2.setText("當前為隨機播放")
            try:
                self.console_button_6.setIcon(icon('fa.random', color='#3FC89C', font=18))
                print('done')
            except:
                print('none')
                pass
            # self.left_shui.setText('切換為單曲循環')
        elif play == 'shui':
            play = 'always'
            print('切換到單曲循環')
            self.label2.setText("當前為單曲循環")
            try:
                self.console_button_6.setIcon(icon('fa.retweet', color='#3FC89C', font=18))
                print('done')
            except:
                print('none')

            # self.left_shui.setText('切換為順序播放')
        elif play == 'always':
            play = 'shun'
            print('切換到順序播放')
            self.label2.setText("當前為順序播放")
            try:
                self.console_button_6.setIcon(icon('fa.align-center', color='#3FC89C', font=18))
                print('done')
            except:
                print('none')

            # self.left_shui.setText('切換為隨機播放')
    except:
        print('模式選擇錯誤')
        pass

播放暫停/開始：

def pause(self):
    global pause
    if pause:
        try:
            mixer.music.unpause()
        except:
            pass
        self.console_button_3.setIcon(icon('fa.pause', color='#3FC89C', font=18))
        pause = False
    else:
        try:
            mixer.music.pause()
        except:
            pass
        self.console_button_3.setIcon(icon('fa.play', color='#F76677', font=18))
        pause = True

音量提高/降低：

def voiceup(self):
    try:
        print('音量加大')
        global voice
        voice += 0.1
        if voice > 1:
            voice = 1
        mixer.music.set_volume(voice)
        k = Decimal(voice).quantize(Decimal('0.00'))
        self.label3.setText('音量：{}'.format(str(k * 100) + '%'))
    except:
        pass

def voicedown(self):
    try:
        print('音量減少')
        global voice
        voice -= 0.1
        if voice  0:
            voice = 0
        mixer.music.set_volume(voice)
        k = Decimal(voice).quantize(Decimal('0.00'))
        self.label3.setText('音量：{}'.format(str(k * 100) + '%'))
    except:
        pass

至此，這款音樂播放器就基本完成啦~ 一起來看看效果吧！