Swift: Dynamic Member Lookup Intro (Xcode 13, 2022) – iOS

In this video we will take a brief introductory look at Dynamic Member Lookup in Swift and Xcode. A feature designed to allow for runtime lookup of properties via subscripts, DynamicMemberLookup annotations are easy to use but powerful in practice. Designed to enable interop with scripting languages like Python, Dynamic Member Lookup is a pillar for for swift compatibility.

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#swift #dynamicMember #interoperability

[eric]

Awesome video! Would love to see more practical examples of this, can’t believe I’ve never heard of it before.

[vinealviji]

Great video! You explained it very well. Also Yes, a more practical example would be very interesting to watch.

[xcoder]

Never used that before. Such a cool Thing.

[marcosfvarani]

Great video as always Afraz!!! Thank you so much

[bobs]

could you make another vid of this for whats applicable?

[alexunbekannt]

could you do a video on the shortcuts integration ( with the Souphef sample code project) please. Best Regards

[rafatwasef]

Thanks A lot that is great
I have a question how to switch to other story board from NSObject class I used what you wrote but it said no present in NSObject please help me

[himanskss]

How do you find like these features Afraz? I mostly learn new features from you.

[anurantheassassin]

Nice video. Interested to know the practical use case of this topic in real life complicated applications.

[ibgib]

Great video! I was just watching one of your json videos and was wondering if Swift had a dynamic mechanism like this video shows. My specific "more practical" use case is how to interop with json (TypeScript atm not Python but 🤷‍♂️). So in your example here, you're always returning a String, but is there a clever & clean way to have a looser base protocol with an "any" or map type and then wrap it with a more concrete protocol? E.g

name: String;
detail: Any; (dynamic)

Then later in code, cast as
name: String
detail: {
address: String;
count: Int;
}

Sorry typing on phone... great video regardless! Thank You!

[arjunhanswal]

How can we nested values of JSON using this

[musbahabushaban]

Can this be used with json instead of codebel ?

[rebellious_]

Haha, The thumbnail image with waves like graphic makes video look like unseen, It does not show progress bar as it is getting merged with same color. Seeing this video again 😂
btw nice topic

[ahmedmujahad]

Hey! So can we execute python script on ios using dynamic lookup?

[leifashley]

Great video, but this seems useless and a bit dangerous… anyone?

[oleksandrbalan]

Seems absolutely useless and unjustifiably dangerous. Is there any example where this can bring any benefit and does not make the whole system less predictable and sustainable?

[me-timeline]

nice tutorial, there could be just a dictionary inside a class then the syntax would be
myClass.json["member"] vs myClass.member
or there could be subscript on the class for strings to map them to the dictionary then the syntax would be
myClass["member"] instead of myClass.member
there are also ways to avoid typing strings for subscripts which reduces typing errors.