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哈尔滨专门做网站,秦皇岛百度推广,前程无忧做一年网站多钱,住房和城乡建设部干部学院网站感受一下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 MyWindo…

感受一下Pyqt5的水平布局与垂直布局及其交叉展示

需求：

  1. 4个按钮水平排放
  2. 4个按钮垂直排放
  3. 水平排放与垂直排放并用
  4. 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_())

效果展示
在这里插入图片描述

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