Multiselect using a custom property wrapper - Modified from child view through a Binding

Multiselect3.swift

//
// Author: Chase Wasden
// Website: https://gist.github.com/ccwasden
// Licensed under MIT license https://opensource.org/licenses/MIT
//

import SwiftUI

struct Fruit: Identifiable {
    let name: String
    var isSelected: Bool
    var id: String { name }
}

struct FruitList: View {
    @BindableArray var fruits = [
        Fruit(name: "Apple", isSelected: false),
        Fruit(name: "Banana", isSelected: true),
        Fruit(name: "Kumquat", isSelected: false),
    ]

    var body: some View {
        VStack {
            Text("Select Fruits (\(fruits.filter { $0.isSelected }.count))")
            List($fruits) { (fruit: Binding<Fruit>) in
                FruitRow(fruit: fruit)
            }
        }
    }

    struct FruitRow: View {
        @Binding var fruit: Fruit
        var body: some View {
            Button(action: { self.fruit.isSelected.toggle() }) {
                HStack {
                    Text(fruit.isSelected ? "☑" : "☐")
                    Text(fruit.name)
                }
            }
        }
    }
}

// ----------- The Reusable Magic ----------- //

extension Binding: Identifiable where Value: Identifiable {
    public var id: Value.ID {
        return wrappedValue.id
    }
}

@propertyWrapper
struct BindableArray<Value> : DynamicProperty {
    @State var storage: [Value]

    init(wrappedValue value: [Value]) {
        self._storage = State(initialValue: value)
    }

    public var wrappedValue: [Value] {
        get { storage }
        nonmutating set { storage = newValue }
    }

    public var projectedValue: [Binding<Value>] {
        var bindings = [Binding<Value>]()
        for (i, item) in storage.enumerated() {
            bindings.append(Binding(
                get: { item },
                set: { self.wrappedValue[i] = $0 }
            ))
        }
        return bindings
    }
}