📦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 ⟩

  • Create a list of views in SwiftUI using ForEach

  • For loop in SwiftUI using ForEach

  • What is the difference between List and ForEach in SwiftUI

🔸

• 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

💈

• ForEach examples - simple examples.

• used by BinaryBitPatternView to list a String's characters.

📜

• AccessibilityRotorContent Conforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to AccessibilityRotorContent.

• DynamicTableRowContent Conforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to TableRowContent.

• DynamicViewContent Conforms when Data conforms to RandomAccessCollection, ID conforms to Hashable, and Content conforms to View.

• TableRowContent Conforms 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.

📘

• SwiftUI ⟩ View groupings ⟩ ForEach

• Swift ⟩ Basic Behaviors ⟩ Identifiable

👥

• 🔲 List

• ScrollVGridForEach

• Cannot convert value of type 'Self' to expected argument type 'Binding<C>'.

🗣

• What is the difference between List and ForEach in SwiftUI? ⭐️

⬇️

• VGridForEach

• ScrollVGridForEach

🖥️

tundsdev ⟩ How To Use ForEach In SwiftUI With Identifiable