Pod Spark-SDK (iOS cloud SDK) v0.3.4 has been released today - it fixes the breakage caused by AFNetworking 3.x.x major release has caused (AFNetworking is an iOS comm lib Spark-SDK pod heavily relies on). I am now still pointing Spark-SDK to use the previous AFNetworking 2.x.x release and as migration process is finalized I’ll release a new version that can work with 3.x.x.
In addition 0.3.4 release now knows Electrons! 
Be sure to run pod update on your Particle related iOS projects to avoid any issues.
Sorry about that, keep on coding cool apps