Qt窗体内控件自适应调整大小

http://stackoverflow.com/questions/3492739/auto-expanding-layout-with-qt-designer

After creating your QVBoxLayout in Qt Designer, right-click on the background of your widget/dialog/window (not the QVBoxLayout, but the parent widget) and

select Lay Out -> Lay Out in a Grid from the bottom of the context-menu. The QVBoxLayout should now stretch to fit the window and will resize automatically when the entire window is resized.

右击窗体->布局->栅格布局