pyqt5进度条扫光

在 PyQt5 中实现进度条的同步可以通过使用 QThread 或者 QRunnable 来实现。下面是一个使用 QThread 的示例代码：

from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QProgressBar

class WorkerThread(QThread):
    progress_changed = pyqtSignal(int)

    def run(self):
        for i in range(101):
            self.progress_changed.emit(i)
            self.msleep(100)  # 模拟耗时操作

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

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

        self.start_button = QPushButton("Start", self)
        self.start_button.clicked.connect(self.start_thread)

        self.setCentralWidget(self.progress_bar)
        self.addToolBar(self.start_button)

        self.worker_thread = WorkerThread()
        self.worker_thread.progress_changed.connect(self.on_progress_changed)

    def start_thread(self):
        self.worker_thread.start()

    def on_progress_changed(self, value):