QThread:线程仍在运行时被销毁 [英] QThread: Destroyed while thread is still running
本文介绍了QThread:线程仍在运行时被销毁的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在 Python 中遇到 QThreads 问题.我想更改标签的背景颜色.但是我的应用程序在启动时崩溃了.QThread:线程仍在运行时被销毁"
I'm having problem with QThreads in python. I want to change background color of label. But My application crash while starting. "QThread: Destroyed while thread is still running"
class MainWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
statusTh = statusThread(self)
self.connect(statusTh, SIGNAL('setStatus'), self.st, Qt.QueuedConnection)
statusTh.start()
def st(self):
if self.status == 'ON':
self.ui.label.setStyleSheet('background-color:green')
else:
self.ui.label.setStyleSheet('background-color:red')
class statusThread(QThread):
def __init__(self, mw):
super(statusThread, self).__init__()
def run(self):
while True:
time.sleep(1)
self.emit(SIGNAL('setStatus'))
if __name__ == "__main__":
app = QApplication(sys.argv)
main_window = MainWindow()
main_window.show()
sys.exit(app.exec_())
推荐答案
在线程被创建后你没有存储对线程的引用,这意味着它会在程序运行一段时间后被垃圾回收(即销毁)离开 MainWindow
的 __init__
.你至少需要在线程运行时存储它,例如使用 self.statusTh
:
You're not storing a reference to the thread after it's been created, which means that it will be garbage collected (ie. destroyed) some time after the program leaves MainWindow
s __init__
. You need to store it at least as long as the thread is running, for example use self.statusTh
:
self.statusTh = statusThread(self)
self.connect(self.statusTh, SIGNAL('setStatus'), self.st, Qt.QueuedConnection)
self.statusTh.start()
这篇关于QThread:线程仍在运行时被销毁的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文