python-pyqt的简易音乐播放器

使用python + pyqt实现的音乐播放器。包括音乐播放和暂停，进度条控制功能。

1.界面设计

1.1 摆放组件

使用QtDesinger，将需要的UI组件摆放好

(1)整体为水平布局，左边为图片，右边为垂直布局的其他组件

(2)右边整体为垂直布局，有三行，第一行是标题lable，第二行是水平布局的进度条和时间显示，第三行是水平布局的音量条和按钮

(3)第二行是水平布局的进度条和时间lable

(4)第三行是音量条和按钮，由于要居右放置，因此左侧有一个空白的lable用于占位

1.2 调整组件尺寸

最终效果

1.3 导出为python代码

QtDesigner导出为python代码，Ui_untitled.py文件

# -*- coding: utf-8 -*-

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def __init__(self,music_player_obj):
        self.song_formats = ['mp3', 'm4a', 'flac', 'wav', 'ogg']
        self.songs_list = []
        self.cur_playing_song = ''
        self.is_pause = True
        self.cur_music_path = ''
        self.music_player_obj = music_player_obj
        self.MainWindow = None
        pass
    def setupUi(self, MainWindow):
        self.MainWindow = MainWindow
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(820, 125)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
        MainWindow.setSizePolicy(sizePolicy)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.layoutWidget = QtWidgets.QWidget(self.centralwidget)
        self.layoutWidget.setGeometry(QtCore.QRect(9, 9, 781, 81))
        self.layoutWidget.setObjectName("layoutWidget")
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.layoutWidget)
        self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayout_2.setSpacing(5)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.logo_lable = QtWidgets.QLabel(self.layoutWidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(1)
        sizePolicy.setVerticalStretch(1)
        sizePolicy.setHeightForWidth(self.logo_lable.sizePolicy().hasHeightForWidth())
        self.logo_lable.setSizePolicy(sizePolicy)
        self.logo_lable.setText("")
        self.logo_lable.setPixmap(QtGui.QPixmap("e:\\myCode\\py-music-player\\res/music_icon.png"))
        self.logo_lable.setObjectName("logo_lable")
        self.horizontalLayout_2.addWidget(self.logo_lable)
        self.verticalLayout = QtWidgets.QVBoxLayout()
        self.verticalLayout.setSizeConstraint(QtWidgets.QLayout.SetDefaultConstraint)
        self.verticalLayout.setSpacing(0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.music_title = QtWidgets.QLabel(self.layoutWidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.music_title.sizePolicy().hasHeightForWidth())
        self.music_title.setSizePolicy(sizePolicy)
        self.music_title.setObjectName("music_title")
        self.verticalLayout.addWidget(self.music_title,0, QtCore.Qt.AlignHCenter)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setSizeConstraint(QtWidgets.QLayout.SetDefaultConstraint)
        self.horizontalLayout_3.setContentsMargins(0, -1, -1, -1)
        self.horizontalLayout_3.setSpacing(20)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.progress_slider = QtWidgets.QSlider(self.layoutWidget)
        self.progress_slider.setEnabled(True)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.progress_slider.sizePolicy().hasHeightForWidth())
        self.progress_slider.setSizePolicy(sizePolicy)
        self.progress_slider.setMinimumSize(QtCore.QSize(0, 0))
        self.progress_slider.setOrientation(QtCore.Qt.Horizontal)
        self.progress_slider.setObjectName("progress_slider")
        self.horizontalLayout_3.addWidget(self.progress_slider)
        self.progress_lable = QtWidgets.QLabel(self.layoutWidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.progress_lable.sizePolicy().hasHeightForWidth())
        self.progress_lable.setSizePolicy(sizePolicy)
        self.progress_lable.setObjectName("progress_lable")
        self.horizontalLayout_3.addWidget(self.progress_lable)
        self.horizontalLayout_3.setStretch(0, 9)
        self.horizontalLayout_3.setStretch(1, 1)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setSizeConstraint(QtWidgets.QLayout.SetDefaultConstraint)
        self.horizontalLayout.setSpacing(12)
        self.horizontalLayout.setObjectName("horizontalLayout")
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        self.label = QtWidgets.QLabel(self.layoutWidget)
        self.label.setText("")
        self.label.setObjectName("label")
        self.horizontalLayout.addWidget(self.label)
        self.volume_slider = QtWidgets.QSlider(self.layoutWidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.volume_slider.sizePolicy().hasHeightForWidth())
        self.volume_slider.setSizePolicy(sizePolicy)
        self.volume_slider.setOrientation(QtCore.Qt.Horizontal)
        self.volume_slider.setObjectName("volume_slider")
        self.horizontalLayout.addWidget(self.volume_slider)
        self.play_btn = QtWidgets.QPushButton(self.layoutWidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.play_btn.sizePolicy().hasHeightForWidth())
        self.play_btn.setSizePolicy(sizePolicy)
        self.play_btn.setObjectName("play_btn")
        self.horizontalLayout.addWidget(self.play_btn)
        self.openmusic_btn = QtWidgets.QPushButton(self.layoutWidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.openmusic_btn.sizePolicy().hasHeightForWidth())
        self.openmusic_btn.setSizePolicy(sizePolicy)
        self.openmusic_btn.setObjectName("openmusic_btn")
        self.horizontalLayout.addWidget(self.openmusic_btn)
        self.horizontalLayout.setStretch(0, 2)
        self.horizontalLayout.setStretch(3, 2)
        self.horizontalLayout.setStretch(4, 2)
        self.verticalLayout.addLayout(self.horizontalLayout)
        self.verticalLayout.setStretch(0, 1)
        self.verticalLayout.setStretch(1, 1)
        self.verticalLayout.setStretch(2, 10)
        self.horizontalLayout_2.addLayout(self.verticalLayout)
        self.horizontalLayout_2.setStretch(1, 10)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 889, 22))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        
        self.retranslateUi(MainWindow)
        self.openmusic_btn.clicked.connect(self.music_player_obj.on_btn_openmusic)
        self.play_btn.clicked.connect(self.music_player_obj.on_btn_playMusic)
        
        def retranslateUi(self, MainWindow):
            _translate = QtCore.QCoreApplication.translate
            MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
            self.music_title.setText(_translate("MainWindow", "请打开音乐"))
            self.progress_lable.setText(_translate("MainWindow", "00:00/00:00"))
            self.play_btn.setText(_translate("MainWindow", "播放"))
            self.openmusic_btn.setText(_translate("MainWindow", "打开"))
            
            def Tips(self, message):
                QtWidgets.QMessageBox.about(self.MainWindow, "提示", message)

2.功能实现

创建主程序文件main.py，初始化界面并启动界面程序

# -*- coding: utf-8 -*-
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
import Ui_untitled
import music_player

print("Hello World")


if __name__ == '__main__':
    app = QApplication(sys.argv)
    MainWindow = QMainWindow()
    music_player = music_player.music_player()
    ui = Ui_untitled.Ui_MainWindow(music_player)
    ui.setupUi(MainWindow)
    music_player.set_ui_obj(ui)
    MainWindow.show()
    sys.exit(app.exec_())

创建music_player.py文件，用于实现按钮功能

# -*- coding: utf-8 -*-
from PyQt5.QtWidgets import  QFileDialog
from PyQt5.QtCore import QUrl, QTimer
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContent
import time

class music_player():
    ui_obj = None
    def __init__(self):
        self.player = QMediaPlayer()
        self.is_switching = False
        self.ui_obj = None
        self.cur_music_path =''
        self.is_pause = True
        self.is_switching = False
        self.setup_grogress_slider()
        
    #获取到UI对象，顺便将进度条归零
    def set_ui_obj(self,ui_obj):
        self.ui_obj = ui_obj
        self.ui_obj.progress_slider.sliderMoved[int].connect(lambda: self.player.setPosition(self.ui_obj.progress_slider.value()))

    #"打开"按钮的功能实现
    def on_btn_openmusic(self):
        print("on btn openmusic")
        music_path = QFileDialog.getOpenFileName(None,"选取音乐文件",'./')
        self.cur_music_path = music_path[0]
        music_title = self.cur_music_path.split('/')[-1].split('.')[0]
        print(self.cur_music_path)
        self.ui_obj.music_title.setText(music_title)
        self.setCurPlaying()
    
    #弹出提示窗口
    def Tips(self, message):
        self.ui_obj.Tips(message)
    
    #设置当前播放文件
    def setCurPlaying(self):
        self.player.setMedia(QMediaContent(QUrl(self.cur_music_path)))

    #播放/暂停按钮的功能实现
    def on_btn_playMusic(self):
        print("in on_btn_playMusic")
        if not self.cur_music_path:
                self.Tips('当前无可播放的音乐文件')
                return
        if not self.player.isAudioAvailable():
                self.Tips('当前无可播放的音乐文件')
                return
        if self.is_pause:
                self.player.play()
                self.is_pause = False
                self.ui_obj.play_btn.setText('暂停')
        elif (not self.is_pause):
                self.player.pause()
                self.is_pause = True
                self.ui_obj.play_btn.setText('播放')
        self.update_progress_slider()

    #设置并启动进度条定时器，每一秒刷新一次进度条
    def setup_grogress_slider(self):
        self.timer = QTimer(self.ui_obj)
        self.timer.start(1000)
        self.timer.timeout.connect(self.update_progress_slider)
    
    #更新进度条位置
    def update_progress_slider(self):
        #没有歌曲时不更新进度条
        if not self.player.isAudioAvailable():
            return
        # 刷新进度条
        if (not self.is_pause):
            self.ui_obj.progress_slider.setMinimum(0)
            self.ui_obj.progress_slider.setMaximum(self.player.duration())
            self.ui_obj.progress_slider.setValue(self.ui_obj.progress_slider.value() + 1000)
            print("music pos:%s"%self.player.position())
        self.ui_obj.progress_lable.setText(time.strftime('%M:%S', time.localtime(self.player.position()/1000)))

3.最终效果