【Pyqt5】水平布局与垂直布局及其交叉展示及实战音乐播放器UI

感受一下Pyqt5的水平布局与垂直布局及其交叉展示

需求：

4个按钮水平排放
4个按钮垂直排放
水平排放与垂直排放并用
实战：音乐播放器UI

水平排放

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QHBoxLayoutclass MyWindow(QWidget):def __init__(self):super().__init__()# 设置窗口标题self.setWindowTitle("mdwsw")# 创建一个水平布局layout = QHBoxLayout()# 创建4个按钮button1 = QPushButton("Button 1")button2 = QPushButton("Button 2")button3 = QPushButton("Button 3")button4 = QPushButton("Button 4")# 将按钮添加到布局中layout.addWidget(button1)layout.addWidget(button2)layout.addWidget(button3)layout.addWidget(button4)# 设置窗口的布局self.setLayout(layout)# 设置窗口大小self.setGeometry(100, 100, 400, 100)# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)window = MyWindow()window.show()sys.exit(app.exec_())

效果展示
在这里插入图片描述

垂直排放

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayoutclass MyWindow(QWidget):def __init__(self):super().__init__()# 设置窗口标题self.setWindowTitle("mdwsw")# 创建一个水平布局layout = QVBoxLayout()# 创建4个按钮button1 = QPushButton("Button 1")button2 = QPushButton("Button 2")button3 = QPushButton("Button 3")button4 = QPushButton("Button 4")# 将按钮添加到布局中layout.addWidget(button1)layout.addWidget(button2)layout.addWidget(button3)layout.addWidget(button4)# 设置窗口的布局self.setLayout(layout)# 设置窗口大小self.setGeometry(100, 100, 400, 100)# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)window = MyWindow()window.show()sys.exit(app.exec_())

效果展示
在这里插入图片描述

交叉展示

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayoutclass MyWindow(QWidget):def __init__(self):super().__init__()# 设置窗口标题self.setWindowTitle("mdwsw")# 创建一个垂直布局layout_v = QVBoxLayout()# 创建一个水平布局layout_h = QHBoxLayout()# 创建4个按钮button1 = QPushButton("Button 1")button2 = QPushButton("Button 2")button3 = QPushButton("Button 3")button4 = QPushButton("Button 4")# 将按钮添加到布局中layout_h.addWidget(button1)layout_h.addWidget(button2)layout_h.addWidget(button3)layout_h.addWidget(button4)# 将水平布局添加到垂直布局中layout_v.addLayout(layout_h)# 创建4个按钮button5 = QPushButton("Button 5")button6 = QPushButton("Button 6")button7 = QPushButton("Button 7")button8 = QPushButton("Button 8")layout_v.addWidget(button5)layout_v.addWidget(button6)layout_v.addWidget(button7)layout_v.addWidget(button8)# 设置窗口的布局self.setLayout(layout_v)# 设置窗口大小self.setGeometry(100, 100, 400, 200)# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)window = MyWindow()window.show()sys.exit(app.exec_())

效果展示
在这里插入图片描述

实战

结合上面的知识，制作一个音乐播放器UI

import sys
from PyQt5.QtWidgets import (QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayout, QSlider, QLabel
)
from PyQt5.QtCore import Qtclass MusicPlayer(QWidget):def __init__(self):super().__init__()# 设置窗口标题self.setWindowTitle("Music Player_Mdwsw")# 创建主布局main_layout = QVBoxLayout()# 歌曲信息self.song_info = QLabel("当前播放: 未知 - 未知")self.song_info.setAlignment(Qt.AlignCenter)main_layout.addWidget(self.song_info)# 进度条self.progress_slider = QSlider(Qt.Horizontal)self.progress_slider.setRange(0, 100)  # 假设歌曲长度为 100self.progress_slider.setValue(0)  # 初始进度为 0main_layout.addWidget(self.progress_slider)# 控制按钮布局control_layout = QHBoxLayout()# 上一首按钮self.prev_button = QPushButton("上一首")control_layout.addWidget(self.prev_button)# 播放/暂停按钮self.play_pause_button = QPushButton("播放")control_layout.addWidget(self.play_pause_button)# 停止按钮self.stop_button = QPushButton("停止")control_layout.addWidget(self.stop_button)# 下一首按钮self.next_button = QPushButton("下一首")control_layout.addWidget(self.next_button)# 将控制按钮布局添加到主布局main_layout.addLayout(control_layout)# 音量控制布局volume_layout = QHBoxLayout()# 音量标签volume_label = QLabel("音量:")volume_layout.addWidget(volume_label)# 音量滑块self.volume_slider = QSlider(Qt.Horizontal)self.volume_slider.setRange(0, 100)self.volume_slider.setValue(50)  # 初始音量为 50volume_layout.addWidget(self.volume_slider)# 将音量控制布局添加到主布局main_layout.addLayout(volume_layout)# 设置主布局self.setLayout(main_layout)# 设置窗口大小self.setGeometry(100, 100, 400, 200)# 连接按钮信号和槽函数self.play_pause_button.clicked.connect(self.toggle_play_pause)self.stop_button.clicked.connect(self.stop_music)self.prev_button.clicked.connect(self.prev_song)self.next_button.clicked.connect(self.next_song)self.volume_slider.valueChanged.connect(self.adjust_volume)self.progress_slider.valueChanged.connect(self.seek_position)# 槽函数def toggle_play_pause(self):if self.play_pause_button.text() == "播放":self.play_pause_button.setText("暂停")print("播放音乐")else:self.play_pause_button.setText("播放")print("暂停音乐")def stop_music(self):self.play_pause_button.setText("播放")print("停止播放")def prev_song(self):print("切换到上一首")def next_song(self):print("切换到下一首")def adjust_volume(self, value):print(f"调整音量: {value}")def seek_position(self, value):print(f"跳转到进度: {value}%")# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)player = MusicPlayer()player.show()sys.exit(app.exec_())

效果展示
在这里插入图片描述
点击触发后日志展示：

跳转到进度: 40%
切换到上一首
播放音乐
停止播放
切换到下一首
跳转到进度: 41%
调整音量: 56

定制一个属于自己的音乐播放器

选择音频文件播放

import sys
from PyQt5.QtWidgets import (QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayout, QSlider, QLabel, QFileDialog
)
from PyQt5.QtCore import Qt, QUrl, QTimer
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContent
from PyQt5.QtMultimediaWidgets import QVideoWidgetclass MusicPlayer(QWidget):def __init__(self):super().__init__()# 初始化媒体播放器self.media_player = QMediaPlayer()self.playlist = []  # 播放列表self.current_index = 0  # 当前播放的歌曲索引# 设置窗口标题self.setWindowTitle("本地音乐播放器")# 创建主布局main_layout = QVBoxLayout()# 歌曲信息self.song_info = QLabel("当前播放: 无")self.song_info.setAlignment(Qt.AlignCenter)main_layout.addWidget(self.song_info)# 进度条self.progress_slider = QSlider(Qt.Horizontal)self.progress_slider.setRange(0, 100)self.progress_slider.setValue(0)self.progress_slider.sliderMoved.connect(self.seek_position)main_layout.addWidget(self.progress_slider)# 控制按钮布局control_layout = QHBoxLayout()# 上一首按钮self.prev_button = QPushButton("上一首")self.prev_button.clicked.connect(self.prev_song)control_layout.addWidget(self.prev_button)# 播放/暂停按钮self.play_pause_button = QPushButton("播放")self.play_pause_button.clicked.connect(self.toggle_play_pause)control_layout.addWidget(self.play_pause_button)# 停止按钮self.stop_button = QPushButton("停止")self.stop_button.clicked.connect(self.stop_music)control_layout.addWidget(self.stop_button)# 下一首按钮self.next_button = QPushButton("下一首")self.next_button.clicked.connect(self.next_song)control_layout.addWidget(self.next_button)# 将控制按钮布局添加到主布局main_layout.addLayout(control_layout)# 音量控制布局volume_layout = QHBoxLayout()# 音量标签volume_label = QLabel("音量:")volume_layout.addWidget(volume_label)# 音量滑块self.volume_slider = QSlider(Qt.Horizontal)self.volume_slider.setRange(0, 100)self.volume_slider.setValue(50)self.volume_slider.valueChanged.connect(self.adjust_volume)volume_layout.addWidget(self.volume_slider)# 将音量控制布局添加到主布局main_layout.addLayout(volume_layout)# 添加文件选择按钮self.file_button = QPushButton("选择音乐文件")self.file_button.clicked.connect(self.open_file_dialog)main_layout.addWidget(self.file_button)# 设置主布局self.setLayout(main_layout)# 设置窗口大小self.setGeometry(100, 100, 400, 200)# 定时器用于更新进度条self.timer = QTimer()self.timer.timeout.connect(self.update_progress)# 打开文件对话框def open_file_dialog(self):file_dialog = QFileDialog()file_dialog.setFileMode(QFileDialog.ExistingFiles)file_dialog.setNameFilter("音乐文件 (*.mp3 *.wav)")if file_dialog.exec_():files = file_dialog.selectedFiles()self.playlist = filesself.current_index = 0self.load_song(self.current_index)# 加载歌曲def load_song(self, index):if 0 <= index < len(self.playlist):song_path = self.playlist[index]self.media_player.setMedia(QMediaContent(QUrl.fromLocalFile(song_path)))self.song_info.setText(f"当前播放: {song_path.split('/')[-1]}")self.play_pause_button.setText("播放")self.media_player.play()# 切换播放/暂停def toggle_play_pause(self):if self.media_player.state() == QMediaPlayer.PlayingState:self.media_player.pause()self.play_pause_button.setText("播放")else:self.media_player.play()self.play_pause_button.setText("暂停")# 停止播放def stop_music(self):self.media_player.stop()self.play_pause_button.setText("播放")# 上一首def prev_song(self):if self.current_index > 0:self.current_index -= 1self.load_song(self.current_index)# 下一首def next_song(self):if self.current_index < len(self.playlist) - 1:self.current_index += 1self.load_song(self.current_index)# 调整音量def adjust_volume(self, value):self.media_player.setVolume(value)# 跳转到指定位置def seek_position(self, value):if self.media_player.duration() > 0:position = int((value / 100) * self.media_player.duration())self.media_player.setPosition(position)# 更新进度条def update_progress(self):if self.media_player.duration() > 0:progress = int((self.media_player.position() / self.media_player.duration()) * 100)self.progress_slider.setValue(progress)# 播放状态改变时启动或停止定时器def media_state_changed(self, state):if state == QMediaPlayer.PlayingState:self.timer.start(1000)  # 每秒更新一次进度条else:self.timer.stop()# 初始化媒体播放器信号连接def init_media_player(self):self.media_player.stateChanged.connect(self.media_state_changed)# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)player = MusicPlayer()player.init_media_player()  # 初始化媒体播放器信号连接player.show()sys.exit(app.exec_())

效果展示
在这里插入图片描述
优化：选择文件夹，识别文件夹内音频文件，播放音频

import sys
import os
from PyQt5.QtWidgets import (QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayout, QSlider, QLabel, QFileDialog
)
from PyQt5.QtCore import Qt, QUrl, QTimer
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContentclass MusicPlayer(QWidget):def __init__(self):super().__init__()# 初始化媒体播放器self.media_player = QMediaPlayer()self.playlist = []  # 播放列表self.current_index = 0  # 当前播放的歌曲索引# 设置窗口标题self.setWindowTitle("本地音乐播放器")# 创建主布局main_layout = QVBoxLayout()# 歌曲信息self.song_info = QLabel("当前播放: 无")self.song_info.setAlignment(Qt.AlignCenter)main_layout.addWidget(self.song_info)# 进度条self.progress_slider = QSlider(Qt.Horizontal)self.progress_slider.setRange(0, 100)self.progress_slider.setValue(0)self.progress_slider.sliderMoved.connect(self.seek_position)main_layout.addWidget(self.progress_slider)# 控制按钮布局control_layout = QHBoxLayout()# 上一首按钮self.prev_button = QPushButton("上一首")self.prev_button.clicked.connect(self.prev_song)control_layout.addWidget(self.prev_button)# 播放/暂停按钮self.play_pause_button = QPushButton("播放")self.play_pause_button.clicked.connect(self.toggle_play_pause)control_layout.addWidget(self.play_pause_button)# 停止按钮self.stop_button = QPushButton("停止")self.stop_button.clicked.connect(self.stop_music)control_layout.addWidget(self.stop_button)# 下一首按钮self.next_button = QPushButton("下一首")self.next_button.clicked.connect(self.next_song)control_layout.addWidget(self.next_button)# 将控制按钮布局添加到主布局main_layout.addLayout(control_layout)# 音量控制布局volume_layout = QHBoxLayout()# 音量标签volume_label = QLabel("音量:")volume_layout.addWidget(volume_label)# 音量滑块self.volume_slider = QSlider(Qt.Horizontal)self.volume_slider.setRange(0, 100)self.volume_slider.setValue(20)self.volume_slider.valueChanged.connect(self.adjust_volume)volume_layout.addWidget(self.volume_slider)# 将音量控制布局添加到主布局main_layout.addLayout(volume_layout)# 添加文件夹选择按钮self.folder_button = QPushButton("选择文件夹")self.folder_button.clicked.connect(self.open_folder_dialog)main_layout.addWidget(self.folder_button)# 设置主布局self.setLayout(main_layout)# 设置窗口大小self.setGeometry(100, 100, 400, 200)# 定时器用于更新进度条self.timer = QTimer()self.timer.timeout.connect(self.update_progress)# 打开文件夹对话框def open_folder_dialog(self):folder_dialog = QFileDialog()folder_path = folder_dialog.getExistingDirectory(self, "选择文件夹")if folder_path:self.load_songs_from_folder(folder_path)else:self.load_songs_from_folder(r"D:\BaiduNetdiskDownload\儿歌")# 从文件夹加载音频文件def load_songs_from_folder(self, folder_path):self.playlist = []supported_formats = [".mp3", ".wav"]  # 支持的音频格式for root, dirs, files in os.walk(folder_path):for file in files:if any(file.endswith(format) for format in supported_formats):self.playlist.append(os.path.join(root, file))if self.playlist:self.current_index = 0self.load_song(self.current_index)else:self.song_info.setText("未找到支持的音频文件")# 加载歌曲def load_song(self, index):if 0 <= index < len(self.playlist):song_path = self.playlist[index]self.media_player.setMedia(QMediaContent(QUrl.fromLocalFile(song_path)))self.song_info.setText(f"当前播放: {os.path.basename(song_path)}")self.play_pause_button.setText("播放")self.media_player.play()# 切换播放/暂停def toggle_play_pause(self):if self.media_player.state() == QMediaPlayer.PlayingState:self.media_player.pause()self.play_pause_button.setText("播放")else:self.media_player.play()self.play_pause_button.setText("暂停")# 停止播放def stop_music(self):self.media_player.stop()self.play_pause_button.setText("播放")# 上一首def prev_song(self):if self.current_index > 0:self.current_index -= 1self.load_song(self.current_index)# 下一首def next_song(self):if self.current_index < len(self.playlist) - 1:self.current_index += 1self.load_song(self.current_index)# 调整音量def adjust_volume(self, value):self.media_player.setVolume(value)# 跳转到指定位置def seek_position(self, value):if self.media_player.duration() > 0:position = int((value / 100) * self.media_player.duration())self.media_player.setPosition(position)# 更新进度条def update_progress(self):if self.media_player.duration() > 0:progress = int((self.media_player.position() / self.media_player.duration()) * 100)self.progress_slider.setValue(progress)# 播放状态改变时启动或停止定时器def media_state_changed(self, state):if state == QMediaPlayer.PlayingState:self.timer.start(1000)  # 每秒更新一次进度条else:self.timer.stop()# 初始化媒体播放器信号连接def init_media_player(self):self.media_player.stateChanged.connect(self.media_state_changed)# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)player = MusicPlayer()player.init_media_player()  # 初始化媒体播放器信号连接player.show()sys.exit(app.exec_())

再优化：播放当前结束，自动跳转下一首；

import sys
import os
from PyQt5.QtWidgets import (QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayout, QSlider, QLabel, QFileDialog
)
from PyQt5.QtCore import Qt, QUrl, QTimer
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContentclass MusicPlayer(QWidget):def __init__(self):super().__init__()# 初始化媒体播放器self.media_player = QMediaPlayer()self.playlist = []  # 播放列表self.current_index = 0  # 当前播放的歌曲索引# 设置窗口标题self.setWindowTitle("本地音乐播放器")# 创建主布局main_layout = QVBoxLayout()# 歌曲信息self.song_info = QLabel("当前播放: 无")self.song_info.setAlignment(Qt.AlignCenter)main_layout.addWidget(self.song_info)# 进度条self.progress_slider = QSlider(Qt.Horizontal)self.progress_slider.setRange(0, 100)self.progress_slider.setValue(0)self.progress_slider.sliderMoved.connect(self.seek_position)main_layout.addWidget(self.progress_slider)# 控制按钮布局control_layout = QHBoxLayout()# 上一首按钮self.prev_button = QPushButton("上一首")self.prev_button.clicked.connect(self.prev_song)control_layout.addWidget(self.prev_button)# 播放/暂停按钮self.play_pause_button = QPushButton("播放")self.play_pause_button.clicked.connect(self.toggle_play_pause)control_layout.addWidget(self.play_pause_button)# 停止按钮self.stop_button = QPushButton("停止")self.stop_button.clicked.connect(self.stop_music)control_layout.addWidget(self.stop_button)# 下一首按钮self.next_button = QPushButton("下一首")self.next_button.clicked.connect(self.next_song)control_layout.addWidget(self.next_button)# 将控制按钮布局添加到主布局main_layout.addLayout(control_layout)# 音量控制布局volume_layout = QHBoxLayout()# 音量标签volume_label = QLabel("音量:")volume_layout.addWidget(volume_label)# 音量滑块self.volume_slider = QSlider(Qt.Horizontal)self.volume_slider.setRange(0, 100)self.volume_slider.setValue(20)self.volume_slider.valueChanged.connect(self.adjust_volume)volume_layout.addWidget(self.volume_slider)# 将音量控制布局添加到主布局main_layout.addLayout(volume_layout)# 添加文件夹选择按钮self.folder_button = QPushButton("选择文件夹")self.folder_button.clicked.connect(self.open_folder_dialog)main_layout.addWidget(self.folder_button)# 设置主布局self.setLayout(main_layout)# 设置窗口大小self.setGeometry(100, 100, 400, 200)# 定时器用于更新进度条self.timer = QTimer()self.timer.timeout.connect(self.update_progress)# 初始化媒体播放器信号连接self.init_media_player()# 打开文件夹对话框def open_folder_dialog(self):folder_dialog = QFileDialog()folder_path = folder_dialog.getExistingDirectory(self, "选择文件夹")if folder_path:self.load_songs_from_folder(folder_path)else:self.load_songs_from_folder(r"D:\BaiduNetdiskDownload\儿歌")# 从文件夹加载音频文件def load_songs_from_folder(self, folder_path):self.playlist = []supported_formats = [".mp3", ".wav"]  # 支持的音频格式for root, dirs, files in os.walk(folder_path):for file in files:if any(file.endswith(format) for format in supported_formats):self.playlist.append(os.path.join(root, file))if self.playlist:self.current_index = 0self.load_song(self.current_index)else:self.song_info.setText("未找到支持的音频文件")# 加载歌曲def load_song(self, index):if 0 <= index < len(self.playlist):song_path = self.playlist[index]self.media_player.setMedia(QMediaContent(QUrl.fromLocalFile(song_path)))self.song_info.setText(f"当前播放: {os.path.basename(song_path)}")self.play_pause_button.setText("播放")self.media_player.play()# 切换播放/暂停def toggle_play_pause(self):if self.media_player.state() == QMediaPlayer.PlayingState:self.media_player.pause()self.play_pause_button.setText("播放")else:self.media_player.play()self.play_pause_button.setText("暂停")# 停止播放def stop_music(self):self.media_player.stop()self.play_pause_button.setText("播放")# 上一首def prev_song(self):if self.current_index > 0:self.current_index -= 1self.load_song(self.current_index)# 下一首def next_song(self):if self.current_index < len(self.playlist) - 1:self.current_index += 1self.load_song(self.current_index)else:# 如果已经是最后一首，停止播放self.stop_music()# 调整音量def adjust_volume(self, value):self.media_player.setVolume(value)# 跳转到指定位置def seek_position(self, value):if self.media_player.duration() > 0:position = int((value / 100) * self.media_player.duration())self.media_player.setPosition(position)# 更新进度条def update_progress(self):if self.media_player.duration() > 0:progress = int((self.media_player.position() / self.media_player.duration()) * 100)self.progress_slider.setValue(progress)# 播放状态改变时启动或停止定时器def media_state_changed(self, state):if state == QMediaPlayer.PlayingState:self.timer.start(1000)  # 每秒更新一次进度条else:self.timer.stop()# 媒体状态改变时检查是否播放结束def media_status_changed(self, status):if status == QMediaPlayer.EndOfMedia:self.next_song()  # 自动播放下一首# 初始化媒体播放器信号连接def init_media_player(self):self.media_player.stateChanged.connect(self.media_state_changed)self.media_player.mediaStatusChanged.connect(self.media_status_changed)# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)player = MusicPlayer()player.show()sys.exit(app.exec_())

在这里插入图片描述
时间显示

import sys
import os
from PyQt5.QtWidgets import (QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayout, QSlider, QLabel, QFileDialog
)
from PyQt5.QtCore import Qt, QUrl, QTimer
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContentclass MusicPlayer(QWidget):def __init__(self):super().__init__()# 初始化媒体播放器self.media_player = QMediaPlayer()self.playlist = []  # 播放列表self.current_index = 0  # 当前播放的歌曲索引# 设置窗口标题self.setWindowTitle("本地音乐播放器")# 创建主布局main_layout = QVBoxLayout()# 歌曲信息self.song_info = QLabel("当前播放: 无")self.song_info.setAlignment(Qt.AlignCenter)main_layout.addWidget(self.song_info)# 时间显示self.time_label = QLabel("00:00 / 00:00")self.time_label.setAlignment(Qt.AlignCenter)main_layout.addWidget(self.time_label)# 进度条self.progress_slider = QSlider(Qt.Horizontal)self.progress_slider.setRange(0, 100)self.progress_slider.setValue(0)self.progress_slider.sliderMoved.connect(self.seek_position)main_layout.addWidget(self.progress_slider)# 控制按钮布局control_layout = QHBoxLayout()# 上一首按钮self.prev_button = QPushButton("上一首")self.prev_button.clicked.connect(self.prev_song)control_layout.addWidget(self.prev_button)# 播放/暂停按钮self.play_pause_button = QPushButton("播放")self.play_pause_button.clicked.connect(self.toggle_play_pause)control_layout.addWidget(self.play_pause_button)# 停止按钮self.stop_button = QPushButton("停止")self.stop_button.clicked.connect(self.stop_music)control_layout.addWidget(self.stop_button)# 下一首按钮self.next_button = QPushButton("下一首")self.next_button.clicked.connect(self.next_song)control_layout.addWidget(self.next_button)# 将控制按钮布局添加到主布局main_layout.addLayout(control_layout)# 音量控制布局volume_layout = QHBoxLayout()# 音量标签volume_label = QLabel("音量:")volume_layout.addWidget(volume_label)# 音量滑块self.volume_slider = QSlider(Qt.Horizontal)self.volume_slider.setRange(0, 100)self.volume_slider.setValue(50)self.volume_slider.valueChanged.connect(self.adjust_volume)volume_layout.addWidget(self.volume_slider)# 将音量控制布局添加到主布局main_layout.addLayout(volume_layout)# 添加文件夹选择按钮self.folder_button = QPushButton("选择文件夹")self.folder_button.clicked.connect(self.open_folder_dialog)main_layout.addWidget(self.folder_button)# 设置主布局self.setLayout(main_layout)# 设置窗口大小self.setGeometry(100, 100, 400, 250)# 定时器用于更新进度条和时间显示self.timer = QTimer()self.timer.timeout.connect(self.update_progress_and_time)# 初始化媒体播放器信号连接self.init_media_player()# 打开文件夹对话框def open_folder_dialog(self):folder_dialog = QFileDialog()folder_path = folder_dialog.getExistingDirectory(self, "选择文件夹")if folder_path:self.load_songs_from_folder(folder_path)# 从文件夹加载音频文件def load_songs_from_folder(self, folder_path):self.playlist = []supported_formats = [".mp3", ".wav"]  # 支持的音频格式for root, dirs, files in os.walk(folder_path):for file in files:if any(file.endswith(format) for format in supported_formats):self.playlist.append(os.path.join(root, file))if self.playlist:self.current_index = 0self.load_song(self.current_index)else:self.song_info.setText("未找到支持的音频文件")# 加载歌曲def load_song(self, index):if 0 <= index < len(self.playlist):song_path = self.playlist[index]self.media_player.setMedia(QMediaContent(QUrl.fromLocalFile(song_path)))self.song_info.setText(f"当前播放: {os.path.basename(song_path)}")self.play_pause_button.setText("播放")self.media_player.play()# 切换播放/暂停def toggle_play_pause(self):if self.media_player.state() == QMediaPlayer.PlayingState:self.media_player.pause()self.play_pause_button.setText("播放")else:self.media_player.play()self.play_pause_button.setText("暂停")# 停止播放def stop_music(self):self.media_player.stop()self.play_pause_button.setText("播放")# 上一首def prev_song(self):if self.current_index > 0:self.current_index -= 1self.load_song(self.current_index)# 下一首def next_song(self):if self.current_index < len(self.playlist) - 1:self.current_index += 1self.load_song(self.current_index)else:# 如果已经是最后一首，停止播放self.stop_music()# 调整音量def adjust_volume(self, value):self.media_player.setVolume(value)# 跳转到指定位置def seek_position(self, value):if self.media_player.duration() > 0:position = int((value / 100) * self.media_player.duration())self.media_player.setPosition(position)# 更新进度条和时间显示def update_progress_and_time(self):if self.media_player.duration() > 0:# 更新进度条progress = int((self.media_player.position() / self.media_player.duration()) * 100)self.progress_slider.setValue(progress)# 更新时间显示current_time = self.format_time(self.media_player.position())total_time = self.format_time(self.media_player.duration())self.time_label.setText(f"{current_time} / {total_time}")# 格式化时间（毫秒 -> 分钟:秒）def format_time(self, milliseconds):seconds = int(milliseconds / 1000)minutes = seconds // 60seconds = seconds % 60return f"{minutes:02}:{seconds:02}"# 播放状态改变时启动或停止定时器def media_state_changed(self, state):if state == QMediaPlayer.PlayingState:self.timer.start(1000)  # 每秒更新一次进度条和时间else:self.timer.stop()# 媒体状态改变时检查是否播放结束def media_status_changed(self, status):if status == QMediaPlayer.EndOfMedia:self.next_song()  # 自动播放下一首# 初始化媒体播放器信号连接def init_media_player(self):self.media_player.stateChanged.connect(self.media_state_changed)self.media_player.mediaStatusChanged.connect(self.media_status_changed)# 主程序
if __name__ == "__main__":app = QApplication(sys.argv)player = MusicPlayer()player.show()sys.exit(app.exec_())