iOS resources to keep yourself updated

You guys can see the trending Objective c & swift projects then learn or adopt those things to your project
https://github.com/trending/objective-c
https://github.com/trending/swift

Advanced apple presentations
https://realm.io/news/tags/apple/

Technical Blogs
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Marshalling vs Serialization

Serialization
When you serialize an object, only the member data within that object is written to the byte stream; not the code that actually implements the object.

Marshalling

When you marshall an Object along with the member data,code base is available
i.e functions of the object..it'll have the function implementation so that using the methods the data can be operated upon