I've been to several technical trainings, including one at my last company on iOS, and some Goldman Sachs training on slang, their proprietary in-house language. I got almost nothing out of either.

I don't think you can really learn how to code without just doing it. Someone may say it's a "learning style" issue, but I've come to believe learning style differences are overblown when teaching "method", e.g. cooking, dancing, programming, drawing, how to play an instrument. You can read all day about how to play a violin and still be garbage until you pick it up and play it.