Having learned Swift, followed later by Objective-C, I would say that Swift's biggest advantage (for me) was giving me a familiar-feeling language while working

Having learned Swift, followed later by Objective-C, I would say that Swift's biggest advantage (for me) was giving me a familiar-feeling language while working out the idiosyncrasies of the iOS API's, Xcode, and all the other things that come with learning iOS development. Once you know Swift well, and have written at least one app, you'll probably know a bit of Objective-C anyways. As other commenters have mentioned, there are lots of libraries that haven't been ported yet, lots of example code on Stack Overflow, etc. The Swift community is still evolving, so you're going to encounter some Obj-C as you work more in iOS-land. From there, learning Obj-C is pretty much limited to the language itself, which is not a huge hurdle (I picked up the rest of what I needed to be productive in a matter of days). TL;DR Learning Swift makes it easier to learn iOS - once you know Swift + iOS, it's easy to pick up Objective-C.