Start simple and get something on your phone - that's how I did it. My personal opinion: stick to official iOS developer documentation and code samples first. That way you'll get a good feeling how e.g. Swift should be used.
My mistake was reading too much open sourced code on Github and adapt a lot of bad coding habits.
My mistake was reading too much open sourced code on Github and adapt a lot of bad coding habits.
The Stanford courses are great too https://itunes.apple.com/us/course/developing-ios-11-apps-wi...