:: *spSignal)(int)=&QSpinBox::valueChanged;
connect(ui->spinBox,spSignal,ui->horizontalSlider,&QSlider...::setValue);
//反过来
connect(ui->horizontalSlider,&QSlider::valueChanged,ui->spinBox,&QSpinBox...arg(ev->globalX()).arg(ev->globalY());
qDebug()<<str;
return true;//代表用户自己处理,不向下分发...(ev->globalX()).arg(ev->globalY());
qDebug()<<str;
return true;//代表用户自己处理,不向下分发...painter.drawRect(QRect(100,100,100,100));
//写字
painter.drawText(QRect(100,100,100,100),"好好学习,天天向上