If you are looking to build iOS apps, Swift is one piece of the puzzle. You will have lot to learn about libraries from Apple and others's to make you productiv

If you are looking to build iOS apps, Swift is one piece of the puzzle. You will have lot to learn about libraries from Apple and others's to make you productive. Stanford's course and courses on Udemy are a good start. I like Stanford's course better because it is tailored for someone who has some experience in programming, however Udemy course is bit more pragmatic. Be patient and be willing to put in time.