🚥Binding

SwiftUI ⟩ Data Flow ⟩ Binding ⟩

⭐️ 注意：@State 與 @Binding 只用於 value type❗

🔴 主題

• Binding State

• Binding from StateObject

🔸 定義

// definition
@frozen @propertyWrapper @dynamicMemberLookup struct Binding<Value>

// ⭐️ A Binding is essentially the following structure:
struct Binding<Value> {
    let get: () -> Value
    let set: (Value) -> ()
}

💈

• SlidersForSize - control width/height.

• SizeRatioControl

📗

• Swift Playgrounds (Date Planner - Event Data)

• MartianCraft ⟩ Creating a Component & Using Binding in SwiftUI

📘 手冊

• SwiftUI ⟩ State and Data Flow ⟩ Binding (struct)

• SwiftOnTap ⟩ Binding ⭐️

• SwiftUI Tutorials ⟩ Handling User Input ⟩ Sec. 3: Add a Control to Toggle the State

👥 相關

• is Property Wrappers.

• can be created from State, StateObject.

• List

• can be declared in ViewModifier.

• used by control.

🗣 討論

• SwiftUI: How to implement a custom init with @Binding variables