用Python语言实现pyqt5的弹窗进度条与子线程同步关联

可以使用QThread和QProgressDialog来实现弹窗进度条与子线程同步关联。具体实现可以参考以下代码：

from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QApplication, QDialog, QProgressBar, QPushButton, QVBoxLayout, QProgressDialog

class Worker(QThread):
    progress_signal = pyqtSignal(int)

    def run(self):
        for i in range(101):
            self.progress_signal.emit(i)
            self.msleep(50)

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

        self.progress_bar = QProgressBar()
        self.progress_bar.setMinimum(0)
        self.progress_bar.setMaximum(100)

        self.start_button = QPushButton("Start")
        self.start_button.clicked.connect(self.start_worker)

        layout = QVBoxLayout()
        layout.addWidget(self.progress_bar)
        layout.addWidget(self.start_button)

        self.setLayout(layout)

    def start_worker(self):
        self.worker = Worker()
        self.worker.progress_signal.connect(self.update_progress)
        self.worker.start()

        self.progress_dialog = QProgressDialog("Processing...", "Cancel", 0, 100, self)
        self.progress_dialog.setWindowModality(2)
        self.progress_dialog.canceled.connect(self.worker.terminate)
        self.progress_dialog.show()

    def update_progress(self, value):
        self.progress_bar.setValue(value)
        self.progress_dialog.setValue(value)

if __name__ == '__main__':
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()

这段代码实现了一个带有进度条的弹窗，点击Start按钮后会启动一个子线程，子线程会不断更新进度条的值，并将当前进度值通过信号发送给主线程。主线程接收到信号后更新进度条的值，并将当前进度值同步更新到进度对话框中。如果用户点击了进度对话框中的取消按钮，子线程会被终止。