简介：
最近在写一个项目，用到了wget下载视频，为了更好的视觉效果，所以使用pyqt5中QProgressBar来实现下载进度条。当视频开始下载就会弹出下载进度条，下载完成后进度条消失。效果如下图;
具体代码实现 ：
import os
import sys
import wget
from PyQt5 import QtWidgets
from PyQt5.QtGui import QFont
from PyQt5.QtWidgets import QProgressBar, QHBoxLayout, QWidget
from config.path import parent_path
from PyQt5.QtCore import QThread, pyqtSignalclass DownloadWidget(QWidget):def __init__(self, video_url, video_name):super(DownloadWidget, self).__init__()self.url = video_urlself.target_name = video_nameself.setWindowTitle('视频下载中...')layout = QHBoxLayout(self)# 创建进度条self.progressBar = QProgressBar(self, minimumWidth=400)self.progressBar.setStyleSheet("QProgressBar { border: 2px solid grey; border-radius: 5px; background-color: ""#FFFFFF; text-align: center;}QProgressBar::chunk {background:QLinearGradient(""x1:0,y1:0,x2:2,y2:0,stop:0 #666699,stop:1 #DB7093); }")font = QFont()font.setBold(True)font.setWeight(30)self.progressBar.setFont(font)self.progressBar.setValue(0)self.progressBar.setMinimum(0)self.progressBar.setMaximum(100)self.progressBar.setFormat('Loaded %p%'.format(self.progressBar.value() - self.progressBar.minimum()))layout.addWidget(self.progressBar)# 创建并启动下载线程self.download_thread = DownloadThread(self.url, self.target_name)self.download_thread.progressChanged.connect(self.update_progress)self.download_thread.start()# 更新进度条def update_progress(self, value):if value == 100:print('下载完成！！！！！！')self.close()self.progressBar.setValue(value)class DownloadThread(QThread):# 定义信号progressChanged = pyqtSignal(int)def __init__(self, video_url, video_name):super(DownloadThread, self).__init__()self.url = video_urlself.target_name = video_namedef run(self):tmpdir = parent_path + '\\static\\mp4'self.download_video(self.url, os.path.join(tmpdir, self.target_name))# 下载视频def download_video(self, url, target_path):wget.download(url, out=target_path, bar=self.progress_bar_callback)self.progressChanged.emit(100)# 回调函数，用于更新进度条def progress_bar_callback(self, current, total, width=80):progress = current / total * 100self.progressChanged.emit(int(progress))if __name__ == '__main__':print("system open")app = QtWidgets.QApplication(sys.argv)main_ui = DownloadWidget("url", 'test.mp4')main_ui.show()sys.exit(app.exec_())
