I'm using NSAttributedString inside my app. Does that mean I have to set my iPhone Deployment Target to 6.0 because NSAttributedString is only supported starting from iOS 6.0?
EDIT: i'm using NSAttributedString like here http://soulwithmobiletechnology.blogspot.com/2012/07/how-to-use-nsattributedstring-in-ios-6.html
you can set deployment target lower than ios6 also but your NSAttributedString will only be working and effective on devices having iOS6 and later. I would recommend you to go for iOS6 as majority of users have already upgraded to iOS6, somewhere I read the number is 84% who have upgraded to iOS6, you can find the references for the users adapting to iOS6