从QRunnable发出信号

问题描述

我正在尝试从QRunnable向我的主QObject发送信号，但是由于某种原因，它没有接收到它们.

I'm trying to send a signal from a QRunnable to my main QObject, but for some reason it isn't receiving them.

这是正确的方法吗?

这是一个小测试用例:

import sys

from PyQt4.QtGui import QApplication
from PyQt4.QtCore import QThreadPool, QObject, QRunnable, pyqtSignal

class WorkerSignals(QObject):
    result = pyqtSignal(int)

class Worker(QRunnable):
    def __init__(self, task):
        super(Worker, self).__init__()

        self.task = task
        self.signals = WorkerSignals()

    def run(self):
        print 'Sending', self.task
        self.signals.result.emit(self.task)

class Tasks(QObject):
    def __init__(self):
        super(Tasks, self).__init__()

        self.pool = QThreadPool()
        self.pool.setMaxThreadCount(1)

    def process_result(self, task):
        print 'Receiving', task    # This does not run

    def start(self):
        for task in range(10):
            worker = Worker(task)
            worker.signals.result.connect(self.process_result)

            self.pool.start(worker)

        self.pool.waitForDone()

if __name__ == '__main__':
    app = QApplication(sys.argv)

    stuff = Tasks()
    stuff.start()

推荐答案

您需要致电app.exec_()

检出 PyQt4中的事件和信号

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