//1,匿名lamda函数
connect(testthread,&testThread::show,this,[=](QString message){ui->mylab->setText(message);});
//2,信号与槽函数
connect(testthread,&testThread::show,ui->mylab,&QLabel::setText);
//3,信号与自定义槽函数
connect(testthread,&testThread::show,this,&MainWindow::settext);
void MainWindow::settext(QString message)
{
ui->mylab->setText(message);
}
Three ways for QT to update the UI
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Origin blog.csdn.net/dwm88888888/article/details/131030833
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