qt中 怎么把ButtonGroup中的radioButton全部设为已选中

Question

如题 ，把buttongroup中的button全部设为已被选中

Answer 1

不可能，同一groupbox的radiobutton只能同时选中一个：

 A QRadioButton is an option button that can be switched on (checked) or off (unchecked). Radio buttons typically present the user with a "one of many" choice. In a group of radio buttons **only one** radio button at a time can be checked; if the user selects another button, the previously selected button is switched off.   <http://doc.qt.io/qt-5/qradiobutton.html>