问题
How can one hide the scrollbars in a QScrollArea? Currently I use the hide() method on the scrollbars returned by QScrollArea::horizontalScrollBar() and QScrollArea::verticalScrollBar() but the space reserved for scrollbars still remains. Obviously this looks very ugly and is not space efficient. If I remove the scrollbars altogether I can no longer easily scroll to a specific point using QScrollBar::setValue().
回答1:
Use this code:
QAbstractScrollArea::setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff )
QAbstractScrollArea::setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff )
回答2:
You can hide it using a style sheet.
Use height:0px; to hide the horizontal scroll bar and width=0px; to hide the vertical scroll bar.
Like that:
horizontalScrollBar()->setStyleSheet("QScrollBar {height:0px;}");
verticalScrollBar()->setStyleSheet("QScrollBar {width:0px;}");
And voila!.No scroll bars, and you can still manipulate them using setValue().
回答3:
From Qt documents for scrollContentsBy():
Calling this function in order to scroll programmatically is an error, use the scroll bars instead (e.g. by calling QScrollBar::setValue() directly).
回答4:
This piece of code can do the job:
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
verticalScrollBar()->hide();
verticalScrollBar()->resize(0, 0);
来源：https://stackoverflow.com/questions/61209275/getting-rid-of-scroll-bars