问题描述：
今天开始做陆家嘴金融杂志，发现新建的项目报错，如下：
Storyboards are unavailable on iOS 4.3 and prior
问题解决：
1.Open XXXXXX.storyboard
2.Open Identity and Type tag in your right view of Xcode.
3.Set the value of Development in Document Versioning to "Xcode 4.2" (my default value is "Default Version (Xcode 4.1)".
4.Change the value of Deployment from Project SDK Version (iOS 5.0) to iOS 5.0, then back to Project SDK Version (iOS 5.0)