Kari Grooms karigrooms

## blog--observableobject+protocols--cuckoo-workaround-option-2.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import Combine

protocol PriceRequesting {

    var price: Price? { get }

    var pricePublisher: AnyPublisher<Price?, Never> { get }

## blog--observableobject+protocols--cuckoo-workaround-option-1.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import Combine

protocol PriceRequesting {

    var price: Price? { get }

    var priceValue: Combine.Published<Price?> { get }

## blog--observableobject+protocols--observableobject-generic.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import SwiftUI

struct PriceView<PriceObservable>: View where PriceObservable: PriceRequesting {

    @ObservedObject var pricing: PriceObservable

    var body: some View {

## blog--observableobject+protocols--protocol-in-uikit.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import Combine
import UIKit

class DemoController: UIViewController {

    private let pricing: PriceRequesting


## blog--observableobject+protocols--observableobject-in-uikit.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import Combine
import UIKit

class DemoController: UIViewController {

    private let pricing: PricingProvider


## blog--observableobject+protocols--protocol-in-swiftui.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import SwiftUI

struct PriceView: View {

    @State private var price: Price?

    let pricing: PriceRequesting

## blog--observableobject+protocols--protocol-no-observableobject.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

// Before
protocol PriceRequesting: ObservableObject {
    // ...
}

class PricingProvider: PriceRequesting {
    // ...

## blog--observableobject+protocols--protocol-published.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import Combine

protocol PriceRequesting: ObservableObject {

    var price: Price? { get }

    var priceValue: Published<Price?> { get }

## blog--observableobject+protocols--protocol-no-published.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import Combine

protocol PriceRequesting: ObservableObject {

    var price: Price? { get }

    func fetch()

## blog--observableobject+protocols--typical-usage-view.swift
// Copyright 2021 Expedia, Inc.
// SPDX-License-Identifier: Apache-2.0

import SwiftUI

struct PriceView: View {

    @ObservedObject var pricing: PricingProvider

    var body: some View {
	// Copyright 2021 Expedia, Inc.
	// SPDX-License-Identifier: Apache-2.0

	import Combine

	protocol PriceRequesting {

	var price: Price? { get }

	var pricePublisher: AnyPublisher<Price?, Never> { get }
	// Copyright 2021 Expedia, Inc.
	// SPDX-License-Identifier: Apache-2.0

	import SwiftUI

	struct PriceView<PriceObservable>: View where PriceObservable: PriceRequesting {

	@ObservedObject var pricing: PriceObservable

	var body: some View {
	// Copyright 2021 Expedia, Inc.
	// SPDX-License-Identifier: Apache-2.0

	// Before
	protocol PriceRequesting: ObservableObject {
	// ...
	}

	class PricingProvider: PriceRequesting {
	// ...