App crashes in lower versions of iPhone

Question

I have created my iPhone app using X code 4.5 and used .xib as 4 inch retina display mode,i have checked "Auto layout" in many views(actually while beginning i was not aware about size issue and all), Now my project is almost over,its running fine with ios6,but when i run it on ios5 it crashes and also if i unchecked all "Auto layout" it crashes in ios6 too.

I am not getting an idea about auto layout, How can make it OK?

Answer 1

请勿对iOS 5.0及以下版本使用自动布局。.删除所有xib的复选标记，然后尝试...