NSData dataWithContentsOfURL: not returning data for URL that shows in browser

Question

I am making an iOS client for the Stack Exchange API. After a long, drawn out fight I finally managed to implement authentication - which gives me a token I stick into a URL

Answer 1

If you are trying to access a remote url via HTTP and using XCode 7 or later you may get a NSCocoaErrorDomain returned from [NSData dataWithContentsOfURL:].

The root cause of this may actually be your "App Transport Security Settings". By default iOS doesn't allow arbitrary loading of URLS.