Learn Swift and iOS Training Path

Phase 1

Learn Swift Fundamentals

Udacity Swift for Beginners (Beginner, 7 days)
Udacity Learn Swift Programming (Intermediate, 3 weeks)

Phase 2

Build your first iOS app

Udacity Swift for Developers (Level: Beginner, Timeline: 7 days)

Phase 3

Build an app that records a conversation between you and a friend, and then makes your voices sound like a chipmunck or Darth Varder.

Udacity Intro to iOS App Development (Level: Intermediate, Timeline: 1 month)

Additional Resources