Logomark
Top-notch video tutorials for developers.

Thousands of developers use NSScreencast to stay on top of iOS development.

Video Training for iOS Developers

The iOS landscape is large and changes often. With short, bite-sized videos released on a steady schedule, NSScreencast helps keep you continually up to date.

  • Quality content We stress the details. Each screencast is carefully produced in HD quality.
  • Team Plans Get access for your whole team. NSScreencast makes for great lunch & learns.
  • Any Device Stream on the web, or use one of our apps for  tv, iPhone, and iPad.
Keep up with iOS Development

NSScreencast has been releasing a new screencasts regularly for more than 6 years. With short videos you can learn a lot over time without a huge time commitment.

NSScreencast offers the largest collection of iOS development screencasts on the internet. With the range of videos that NSScreencast offers, there is something for people of every skill level.

Bite-sized screencasts on iOS and Mac development.

There is 1 episode with tag 'generics'   Clear search
lock
#395
You may encounter a scenario where you want to decode some JSON that contains an array of objects that may be of a different type. In this episode we examine such a scenario, where we have a feed that contains an array of posts, but each post object can be of a different kind, such as text, image, or video. We will take a look at how to solve this by introducing a protocol called DecodableClassFamily, and along with a Discriminator that will inform the decoding logic which type it should decode. We'll then take this working example and make a reusable solution using Swift Generics.