QScrollArea添加控件自动滚动

 

QScrollArea在添加控件的时候会自动触发一个信号 

void QAbstractSlider::rangeChanged(int min, int max)

This signal is emitted when the slider range has changed, with min being the new minimum, and max being the new maximum.

See also minimum and maximum.

意思是你添加控件，我这边发现有东西塞过来了，我滚动条要变化一下。

根据这个就知道有控件进入QScrollArea了，这就好办了。

connect(ui->scrollArea->verticalScrollBar(),SIGNAL(rangeChanged(int,int)),this,SLOT(slot_sendScroll()));
}

槽函数里面这么写

void MYCLASS::slot_sendScroll()
{
    ui->scrollArea->verticalScrollBar()->setValue( ui->scrollArea->verticalScrollBar()->maximum());//直接滚到底
}