How to use KeyPaths in Swift | Advanced Learning #29

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In Swift, a KeyPath is a way to reference a property, or a nested set of properties, of a particular type in a type-safe manner. It provides a convenient and type-checked way to access properties and their values without needing to use string-based key-value coding (KVC) or dynamic member lookup. KeyPaths are often used in Swift for tasks like sorting, filtering, or key-value observation, and they contribute to safer, more predictable code.
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00:00 Keypaths
01:38 Welcome back!
02:26 What is a Keypath?
04:40 Basic Keypaths
07:37 Nested Keypaths
08:40 Keypaths for custom methods
11:09 Sorting with Keypaths
13:14 Creating an extension
18:08 Adding generics
19:30 Polish & Optimizations
23:35 Wrapping up

Опубликовано:

30 июн 2024

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Комментарии : 18

@RobertHolzapfel 8 месяцев назад

I am so glad, that you started again publishing these videos, even more, since they address advanced developers ...I am loving it. THANK YOU.

@larschristiansen3136 Месяц назад

Great Presentations, great suspense , looking forward to the next two videos

@sherelynsilverio2719 5 месяцев назад

Hi Nick. Been waiting for your SwiftData tutorial

@kdtechniquesofficial6153 3 месяца назад

Awesome as always... 👨🏻‍💻

@w0mblemania 7 месяцев назад

Thanks for this. It was very well done. It's great to see some of these more advanced topics on RU-vid.

@magicinternetmoney8715 8 месяцев назад

loving this series

@bassemmagdi6671 8 месяцев назад

One of a kind instructor Truly amazing work Thank you so much ❤

@treboc2942 7 месяцев назад

Really nice! Thanks for this.

@07ellboy 8 месяцев назад

Yes Sir ! This playlist is lit 🔥🧯

@josemanuelortizsanchez4983 7 месяцев назад

Thanks, Nick!!

@arnosolo2008 8 месяцев назад

Thank you 😺

@simply6162 8 месяцев назад

ahhh this is the video was waiting for :D !!!

@tawroof9353 8 месяцев назад

Hey, Your videos is real amazing. Even english is not my native language I understand everything and I enjoy your videos, but i have a question are you going to make videos about uikit i think it will be helpful. Thank you so much

@alexvaiman4966 3 месяца назад

You missed the part when key path used to inject environment variables. , PS key/path, is very old objective-c days thing, used to dynamically observe changes in your class, subscribe to some key-path, and then act on a change.

@SwiftfulThinking 3 месяца назад

The next videos cover property wrappers and will include environment variables! Thanks for the obj-c background, I didn’t know that

@yashpatil5946 8 месяцев назад

I can’t find the use of keyPath

@philippegden9826 8 месяцев назад

They are super useful when you want the user to be able choose a specific field in some model. Let me try and make that more real: I developed a photo asset manager. One feature allows the user to choose which metadata field they wanted to display against the thumbnails (e.g. filename, date, camera, etc). I created an enum with cases for each metadata field. Then I had a computed property which would return the associated keypath for each case. With this done, it was relatively easy to show the user a picker of all the fields available, and then use the setting to display the field chosen. There are of course many routes to Rome, but I found key paths super useful in this project.

@eddiecarbon146 8 месяцев назад

Hi Nick! Are you planning to create an application for advanced users?🥹 Maybe with firebase? Your videos are great❤, I've been watching all your materials from the beginning!