让程序同时支持iOS 六和iOS 7

让程序同时支持iOS 6和iOS 7传送门:http://beyondvincent.com/blog/2013/11/19/122-working-with-ios-6-an

让程序同时支持iOS 6和iOS 7

传送门:

http://beyondvincent.com/blog/2013/11/19/122-working-with-ios-6-and-7/