Are storyboards going to work on ios 4?

问题

Storyboards are new features in xcode 4.2 which simplify navigation design.
I assume new apps using storyboards are going to be working just fine on iOS 5 when it ships but I haven't seen anything about storyboards compatibility with iOS 4.
It makes sense that they would work (just like ARC is supposed to be going to work - they are a compiler / IDE feature, not runtime features AFAIK) but that's just me guessing, does anyone know if it's safe to use storyboards and be able to ship for iOS 4?

thanks!

回答1:

Storyboards themselves are NDAd. But no, storyboards are absolutely not compatible with iOS4, the rely on new runtime classes which are not available there.

来源：https://stackoverflow.com/questions/7190571/are-storyboards-going-to-work-on-ios-4