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Add EitherView instructions for new update system
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david-swift 2026-02-02 22:29:52 +01:00
parent ed46533740
commit 64c536b03c
2 changed files with 5 additions and 3 deletions
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6
Sources/Meta.docc/Tutorials/CreateBackend.md
View File

@ -373,9 +373,7 @@ For the ``EitherView``, it is again the initializer that has to match a requirem
type: Data.Type type: Data.Type
) -> ViewStorage where Data: ViewRenderData { ) -> ViewStorage where Data: ViewRenderData {
let view = TermKit.View() let view = TermKit.View()
let storage = ViewStorage(view) return .init(view)
update(storage, data: data, updateProperties: true, type: type)
return storage
} }
// ... // ...
@ -386,6 +384,7 @@ Normally, you would initialize all your content storages in the container functi
In this case, this does not work. If the either view is called via standard `if`/`else` syntax and the condition is `true`, In this case, this does not work. If the either view is called via standard `if`/`else` syntax and the condition is `true`,
we can access `view1`, but `view2` is empty (the actual view is not known). If `condition` is `false`, `view1` is empty and `view2` is known. we can access `view1`, but `view2` is empty (the actual view is not known). If `condition` is `false`, `view1` is empty and `view2` is known.
Therefore, we have to wait with the initialization process until `condition` changes, which is why this is handled in the `update` function. Therefore, we have to wait with the initialization process until `condition` changes, which is why this is handled in the `update` function.
Make sure to call the child view's `update` function after constructing a view in the parent view's `update` function.
```swift ```swift
// ... // ...
@ -406,6 +405,7 @@ Therefore, we have to wait with the initialization process until `condition` cha
view = content.pointer as? TermKit.View view = content.pointer as? TermKit.View
} else { } else {
let content = body.storage(data: data, type: type) let content = body.storage(data: data, type: type)
body.update(content, data: data, updateProperties: true, type: type)
storage.content[condition.description] = [content] storage.content[condition.description] = [content]
view = content.pointer as? TermKit.View view = content.pointer as? TermKit.View
} }

2
Sources/Model/User Interface/View/EitherView.swift
View File

@ -6,6 +6,8 @@
// //
/// A view building conditional bodies. /// A view building conditional bodies.
///
/// Do not forget to call the update function after constructing a new UI.
public protocol EitherView: AnyView { public protocol EitherView: AnyView {
/// Initialize the either view. /// Initialize the either view.