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在Delphi里我记得是使用TThread.Synchronize(TThreadMethod),原理是利用了一个隐藏窗口来处理。
在QT Debug模式一下,碰到了同样的问题,显示错误:
cannot send events to objects owned by a different thread
解决方案是使用信号槽,就是在线程里不断的发信号,UI线程的槽函数不断的接受信号并做处理:
So as a solution I would propose the following:
参考:http://stackoverflow.com/questions/9018434/qthread-doesnt-work-well
或者使用:
int ThreadTest::showProgress(int percent, void *pContext)
{
// instead of: someOtherQObject->updateProgress(percent);
QMetaObject::invokeMethod(someOtherQObject, // obj
SLOT(updateProgress(int)), // member
Qt::QueuedConnection, // connection type
Q_ARG(int, percent)); // val1
//qDebug() << "Progress: " << QString::number(percent);
return 0;
}
https://forum.qt.io/topic/9119/solved-how-can-i-evade-the-error-cannot-send-events-to-objects-owned-by-a-different-thread/4
在非UI线程中更改UI(Delphi使用隐藏窗口来处理,QT使用信号槽)
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原文地址:http://www.cnblogs.com/findumars/p/4741042.html