Most iOS bloggers use Swift. Want to learn iOS 9 in 2 months? I bet most examples are in Swift. I've collected almost 1000 Swift articles in the past year.
http://www.h4labs.com/dev/ios/swift.html
Think Apple's demos at WWDC will in Swift, ObjC, or both? Apple doesn't do "legacy" for very long.
http://ericasadun.com/2015/04/14/swift-in-case-you-didnt-thi...