pyqt的软件实现自动升级，安装的代码例子

以下是一个使用PyQt实现自动升级和安装的代码例子：

import sys
import urllib.request
import zipfile
import os
from PyQt5.QtWidgets import QApplication, QDialog, QLabel, QPushButton, QProgressBar
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import Qt, QThread, pyqtSignal, QUrl
from PyQt5.QtNetwork import QNetworkAccessManager, QNetworkRequest, QNetworkReply

class Updater(QDialog):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("Updater")
        self.setWindowIcon(QIcon("icon.png"))
        self.setFixedSize(400, 150)

        self.lbl_info = QLabel("Checking for updates...", self)
        self.lbl_info.setGeometry(20, 20, 360, 20)

        self.progress_bar = QProgressBar(self)
        self.progress_bar.setRange(0, 100)
        self.progress_bar.setGeometry(20, 50, 360, 20)

        self.btn_update = QPushButton("Update", self)
        self.btn_update.setGeometry(20, 90, 80, 30)
        self.btn_update.clicked.connect(self.update)

        self.btn_quit = QPushButton("Quit", self)
        self.btn_quit.setGeometry(300, 90, 80, 30)
        self.btn_quit.clicked.connect(self.quit)

        self.network_manager = QNetworkAccessManager()
        self.network_manager.finished.connect(self.download_finished)

        self.download_thread = DownloadThread()
        self.download_thread.download_progress.connect(self.download_progress)
        self.download_thread.download_complete.connect(self.download_complete)

    def check_updates(self):
        self.lbl_info.setText("Checking for updates...")
        self.progress_bar.setValue(0)

        url = "http://example.com/version.txt"
        request = QNetworkRequest(QUrl(url))
        self.network_manager.get(request)

    def download_progress(self, progress):
        self.progress_bar.setValue(progress)

    def download_complete(self, success):
        if success:
            self.lbl_info.setText("Download complete. Installing updates...")
            self.install_updates()
        else:
            self.lbl_info.setText("Download failed. Please try again later.")
            self.btn_update.setEnabled(True)

    def install_updates(self):
        self.progress_bar.setValue(0)

        with zipfile.ZipFile("updates.zip", "r") as zip_ref:
            zip_ref.extractall()

        os.execl(sys.executable, *([sys.executable] + sys.argv))

    def update(self):
        self.btn_update.setEnabled(False)
        self.download_thread.start()

    def quit(self):
        sys.exit()

    def download_finished(self, reply):
        if reply.error() != QNetworkReply.NoError:
            self.lbl_info.setText("Network error. Please try again later.")
            self.btn_update.setEnabled(True)
            return

        data = reply.readAll().data().decode()
        latest_version = data.strip()

        if latest_version == "1.0":
            self.lbl_info.setText("You have the latest version.")
            self.btn_update.setEnabled(False)
        else:
            self.lbl_info.setText("New version available. Click Update to download.")
            self.btn_update.setEnabled(True)

class DownloadThread(QThread):
    download_progress = pyqtSignal(int)
    download_complete = pyqtSignal(bool)

    def run(self):
        url = "http://example.com/updates.zip"
        request = QNetworkRequest(QUrl(url))
        reply = updater.network_manager.get(request)

        file_size = int(reply.header(QNetworkRequest.ContentLengthHeader))
        bytes_per_chunk = 1024 * 1024
        downloaded = 0

        with open("updates.zip", "wb") as file:
            while True:
                data = reply.read(bytes_per_chunk)

                if not data:
                    break

                downloaded += len(data)
                file.write(data)

                progress = int(downloaded / file_size * 100)
                self.download_progress.emit(progress)

        success = downloaded == file_size
        self.download_complete.emit(success)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    updater = Updater()
    updater.check_updates()
    updater.show()
    sys.exit(app.exec_())

在这个例子中，Updater类实现了一个简单的GUI界面，用户可以通过点击Update按钮来触发自动升级的过程。当用户点击Update按钮时，程序会启动一个DownloadThread线程来下载更新包。下载过程中，程序会不断地发出download_progress信号来更新进度条。当下载完成时，程序会发出download_complete信号，并根据下载结果来决定是否安装更新。安装更新的过程很简单，只需要将更新包解压缩并重新启动程序即可。