Show HN: Make an app by adding JSON to this app

Re:Show HN: Make an app by adding JSON to this app by saganus on Saturday November 05, 2016 @10:36AM (#12879918)

This is very interesting.

However I'm no iOS developer, so could you give me a cursory explanation on how it works? I mean, I can imagine creating a framework that has "empty" screens, and then just loading data into them, but this seems like it can do much more.

So for example, if I want an app with say 4 screens, and GPS access (if supported) and a few buttons, do you have all those objects already in memory and just copy them and inject the data to show on screen?

Or maybe it's too early and I'm missing something. Very neat though!

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Re:Show HN: Make an app by adding JSON to this app by gliechtenstein on Saturday November 05, 2016 @11:37AM (#12880172)

Almost correct. To be precise, it doesn't have the objects in memory, it instantiates all the native components on demand based on the JSON recipe. And all of them of course go away once you close that view.

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Re:Show HN: Make an app by adding JSON to this app by mitchtbaum on Saturday November 05, 2016 @01:27PM (#12880765)

>> how it works

> it instantiates .. components on demand

In general, to wrap your information engine around how information engines wrap around components, check out this marvelous design pattern: https://en.wikipedia.org/wiki/Visitor_pattern , like here https://github.com/Jasonette/JASONETTE-iOS/blob/develop/app/...

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Re:Show HN: Make an app by adding JSON to this app by saganus on Saturday November 05, 2016 @02:57PM (#12881289)

Aha! thanks to both of you for the answer.

I've read about the Visitor pattern before, but did not link it to an engine like this.

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