Nothing beats face-to-face conversation, especially when the person you are talking to has already solved the same problem you’re facing. And this goes not only for coding problems, but for the other areas that make an app successful: design, marketing, business, and so on. Conferences and local developer groups are great places to network with others.
No matter where you are, there are likely others creating iOS apps somewhere near you. Local developer groups exist all over the world. Finding them can sometimes be challenging, but the web can help. In addition to doing a simple search, you can look at a couple mobile group–aggregating websites: