I have setup CocoaPods in my project and successfully installed AFNetworking so I know I am good there...
When I try to install 'YelpAPI', I receive this error in my terminal...
[!] The platform of the target ForTheTroops (iOS 9.3) is not compatible with YelpAPI (1.0.3), which does not support ios.
I can't seem to figure out why and I can't find any instructions to set this up properly... even in Yelp's developer site.
Here's a screenshot of my podfile as well.

Update: I worked with Yelp on this and the Podspec file was updated.
Pod 'YelpAPI' works successfully now for iOS.