Pyqt中让progressbar根据Qprocess执行的进度不断更新

你可以通过以下代码实现让progressbar根据Qprocess执行的进度不断更新：

from PyQt5.QtCore import QProcess, pyqtSignal, Qt
from PyQt5.QtGui import QTextCursor
from PyQt5.QtWidgets import QApplication, QDialog, QDialogButtonBox, QProgressBar, QVBoxLayout, QTextEdit

class ProcessDialog(QDialog):
    def __init__(self, parent=None):
        super(ProcessDialog, self).__init__(parent)

        self.process = QProcess(self)
        self.process.readyReadStandardOutput.connect(self.updateOutput)
        self.process.finished.connect(self.processFinished)

        self.progressBar = QProgressBar(self)
        self.progressBar.setRange(0, 100)

        self.logWindow = QTextEdit(self)
        self.logWindow.setReadOnly(True)

        self.buttonBox = QDialogButtonBox(Qt.Horizontal, self)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel)

        layout = QVBoxLayout(self)
        layout.addWidget(self.progressBar)
        layout.addWidget(self.logWindow)
        layout.addWidget(self.buttonBox)

        self.setLayout(layout)

        self.buttonBox.rejected.connect(self.reject)

    def startProcess(self, program, arguments):
        self.process.start(program, arguments)

        if not self.process.waitForStarted():
            self.logWindow.append("Failed to start process")
            self.reject()

        self.logWindow.append("Process started: %s %s" % (program, ' '.join(arguments)))

    def updateOutput(self):
        cursor = self.logWindow.textCursor()
        cursor.movePosition(QTextCursor.End)
        cursor.insertText(str(self.process.readAllStandardOutput(), encoding='utf-8'))
        self.logWindow.setTextCursor(cursor)
        self.logWindow.ensureCursorVisible()

        # 根据进程执行情况更新进度条
        progress = self.process.readAll().data().decode('utf-8').strip()
        if progress.isnumeric():
            self.progressBar.setValue(int(progress))

    def processFinished(self):
        self.logWindow.append("Process finished with exit code %d" % self.process.exitCode())
        self.buttonBox.button(QDialogButtonBox.Cancel).setText("Close")

if __name__ == '__main__':
    import sys

    app = QApplication(sys.argv)

    dialog = ProcessDialog()
    dialog.startProcess('ping', ['-c', '10', 'google.com'])
    dialog.exec_()
    
    sys.exit(app.exec_())

在这个例子中，我们创建了一个ProcessDialog类，该类包含了一个QProgressBar和QTextEdit。我们使用QProcess执行了一个ping命令，并在QTextEdit中实时显示输出。在updateOutput函数中，我们还根据进程执行情况更新了QProgressBar。