AutoLayout UIScrollView内容在旋转时不调整大小（包括示例项目）

I'm trying to wrap my head around AutoLayout works and I think I understand most of it except for UIScrollViews. When I add those views to a project, they refuse to expand the dimensions of the screen. They will appear fine in the iPhone vertical view but when rotated, they will not expand. Also, when you launch the project in the iPad simulator, the UIScrollView screens will not expand to the dimensions of the iPad. The actual UIScrollView expands but it's content does not expand.I'm trying to wrap my head around AutoLayout wo