📦ForEach

╱🚧 under construction -> View Groupings

SwiftUI ⟩ View Groupings ⟩ ForEach

ForEach generates views for each element in a collection.

⭐ 語法範例：

// <collection> must conform to Identifiable
ForEach(collection) { element in
    Text(element.name)
}

⭐️ 注意：

ForEach doesn’t get hit by the 10-view limit. ⭐️
ForEach 不一定是 View，也可能是其他東西，如：TableRowContent

(👉 See: 📜 協定)

Hacking with Swift - Creating views in a loop
Sarun ⟩

Use ForEach to provide views based on a RandomAccessCollection of some data type.
Either the collection’s elements must conform to Identifiable or you need to provide an id parameter to the ForEach initializer.

struct ForEach<Data, ID, Content> where 
    Data: RandomAccessCollection, 
    ID  : Hashable
    // ⭐️ `Content` can conform to different protocols,
    // ⭐️ so is `ForEach`.
    
// ⭐️ ForEach conforms to 🅿️ View when: (👉 See: 📜 協定)
// • Data   : RandomAccessCollection
// • ID     : Hashable 
// • Content: View

⭐️ initializers

// ⭐️ ForEach(data) { item in ... }
init(_ data: Data, content: @escaping (Data.Element) -> Content)
// ⭐️ available when:
// • Data        : RandomAccessCollection
// • Data.Element: Identifiable
// • Content     : View
// • ID == Data.Element.ID

AccessibilityRotorContentConforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to AccessibilityRotorContent.
DynamicTableRowContentConforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to TableRowContent.
DynamicViewContentConforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to View.
TableRowContentConforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to TableRowContent.
View ⭐️Conforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to View.

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Last updated 15 days ago