If you need mentoring or are stuck and need some hands on help with building your iOS app for a business application then I am your guy. I can get you started and help you navigate through many early pitfalls as you create a really great business app.
I developed and deployed KnowledgeKeeper a mobile video app for business and enterprise. www.knowledgekeeper.com Business apps like KnowledgeKeeper almost always require a backend as a service (BaaS). I am very experienced at creating and managing the "full stack" using the Parse open source BaaS (www.parse.com) that is required to deploy and maintain a mobile iOS app.
Weather you are just getting started or if you have been using iOS Xcode for years, autolayout in interface builder can be frustrating. I can provide you with the help you need from the fundamentals of using constraints to advanced layouts with hundreds of objects.
I think Parse is one of the best if not the best back end as a service (BaaS) ever written for mobile apps. I use Parse every day. I can help you get started or for more advanced app I can help you with Parse Cloud Code. Parse is now open an source BaaS (www.parse.com) that is required to deploy and maintain a mobile iOS app.
Most API's are fairly straightforward. Just follow the API's documentation to authenticate and then make the network call. Instagram's API is a little tougher because right off the bat it requires your app to be in it's "Sandbox" while you are developing and testing. If your confused or just stuck with using the Instagram API in your iOS app, I can help.