Never Type in SwiftUI: Exploring its Role in Creating Primitive Views
Hello guys, Welcome to another video. Today we will explore Never type in Swift. Never is great to represent things that literally will never happen, but also to stop the execution of an application in case something really bad just happened.
However, that’s not all, Never is a vital piece to build SwiftUI Framework. Let’s see how SwiftUI uses Never to avoid infinite loops reviewing subviews in body property.
Let's get started 😉!
Content:
0:00 - Intro
1:08 - Every function must return a type
4:00 - Never to stop the execution
7:14 - Cases that will never happen
12:06 - Never in SwiftUI
16:43 - Can we create custom views with Never?
18:38 - Summary
19:55 - Outro
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References:
NSHipster: https://nshipster.com/never/
Never proposal: https://github.com/apple/swift-evolut...
How never internally works?: https://swiftrocks.com/how-never-work...
Impossible views: https://www.fivestars.blog/articles/i...
Source code showed in the video:
https://github.com/pitt500/swift-and-...
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Other videos in the channel:
State management in SwiftUI: • State Management in SwiftUI
UIKit in SwiftUI: • UIKit in SwiftUI
Generics: • Generics
The power of Combine: • The power of Combine
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Credits:
Music by Wataboi from https://pixabay.com/
Video edited with LumaFusion
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