【SwiftUI】Live Activityのサンプルコードを実行する（iOS16.1/Xcode14.1）

import Foundation
import ActivityKit

struct PizzaDeliveryAttributes: ActivityAttributes {
    public typealias PizzaDeliveryStatus = ContentState

    public struct ContentState: Codable, Hashable {
        var driverName: String
        var deliveryTimer: ClosedRange<Date>
    }

    var numberOfPizzas: Int
    var totalAmount: String
    var orderNumber: String
}

import SwiftUI
import WidgetKit

struct LockScreenLiveActivityView: View {
    let context: ActivityViewContext<PizzaDeliveryAttributes>
    
    var body: some View {
        VStack {
            Spacer()
            Text("\(context.state.driverName) is on their way with your pizza!")
            Spacer()
            HStack {
                Spacer()
                Label {
                    Text("\(context.attributes.numberOfPizzas) Pizzas")
                } icon: {
                    Image(systemName: "bag")
                        .foregroundColor(.indigo)
                }
                .font(.title2)
                Spacer()
                Label {
                    Text(timerInterval: context.state.deliveryTimer, countsDown: true)
                        .multilineTextAlignment(.center)
                        .frame(width: 50)
                        .monospacedDigit()
                } icon: {
                    Image(systemName: "timer")
                        .foregroundColor(.indigo)
                }
                .font(.title2)
                Spacer()
            }
            Spacer()
        }
        .activitySystemActionForegroundColor(.indigo)
        .activityBackgroundTint(.cyan)
    }
}

import WidgetKit
import SwiftUI

@main
struct PizzaDeliveryWidget: Widget {
    var body: some WidgetConfiguration {
        ActivityConfiguration(for: PizzaDeliveryAttributes.self) { context in
            // Create the view that appears on the Lock Screen and as a
            // banner on the Home Screen of devices that don't support the
            // Dynamic Island.
            LockScreenLiveActivityView(context: context)
        } dynamicIsland: { context in
            // Create the views that appear in the Dynamic Island.
            DynamicIsland {
                // Create the expanded view.
                DynamicIslandExpandedRegion(.leading) {
                    Label("\(context.attributes.numberOfPizzas) Pizzas", systemImage: "bag")
                        .foregroundColor(.indigo)
                        .font(.title2)
                }
                
                DynamicIslandExpandedRegion(.trailing) {
                    Label {
                        Text(timerInterval: context.state.deliveryTimer, countsDown: true)
                            .multilineTextAlignment(.trailing)
                            .frame(width: 50)
                            .monospacedDigit()
                    } icon: {
                        Image(systemName: "timer")
                            .foregroundColor(.indigo)
                    }
                    .font(.title2)
                }
                
                DynamicIslandExpandedRegion(.center) {
                    Text("\(context.state.driverName) is on their way!")
                        .lineLimit(1)
                        .font(.caption)
                }
                
                DynamicIslandExpandedRegion(.bottom) {
                    Button {
                        // Deep link into your app.
                    } label: {
                        Label("Call driver", systemImage: "phone")
                    }
                    .foregroundColor(.indigo)
                }
                
            } compactLeading: {
                Label {
                    Text("\(context.attributes.numberOfPizzas) Pizzas")
                } icon: {
                    Image(systemName: "bag")
                        .foregroundColor(.indigo)
                }
                .font(.caption2)
            } compactTrailing: {
                Text(timerInterval: context.state.deliveryTimer, countsDown: true)
                    .multilineTextAlignment(.center)
                    .frame(width: 40)
                    .font(.caption2)
            } minimal: {
                VStack(alignment: .center) {
                    Image(systemName: "timer")
                    Text(timerInterval: context.state.deliveryTimer, countsDown: true)
                        .multilineTextAlignment(.center)
                        .monospacedDigit()
                        .font(.caption2)
                }
            }
            .keylineTint(.cyan)
        }
    }
}

import SwiftUI
import ActivityKit

struct ContentView: View {
    
    @State var deliveryActivity:Activity<PizzaDeliveryAttributes>?
    
    @State var minutes = "10"
    @State var seconds = "10"
    
    var body: some View {
        VStack {
            HStack {
                Text("Minutes:")
                TextField("minutes", text: $minutes)
            }
            HStack {
                Text("Seconds:")
                TextField("seconds", text: $seconds)
            }
            
            Button("Request LiveActivity"){
                var future = Calendar.current.date(byAdding: .minute, value: (Int(minutes) ?? 0), to: Date())!
                future = Calendar.current.date(byAdding: .second, value: (Int(seconds) ?? 0), to: future)!
                let date = Date.now...future
                let initialContentState = PizzaDeliveryAttributes.ContentState(driverName: "Bill James", deliveryTimer:date)
                let activityAttributes = PizzaDeliveryAttributes(numberOfPizzas: 3, totalAmount: "$42.00", orderNumber: "12345")

                do {
                    deliveryActivity = try Activity.request(attributes: activityAttributes, contentState: initialContentState)
                    print("Requested a pizza delivery Live Activity \(String(describing: deliveryActivity?.id)).")
                } catch (let error) {
                    print("Error requesting pizza delivery Live Activity \(error.localizedDescription).")
                }
            }.padding()
        }
        .padding()
    }
}

Button("Update LiveActivity"){
    var future = Calendar.current.date(byAdding: .minute, value: (Int(minutes) ?? 0), to: Date())!
    future = Calendar.current.date(byAdding: .second, value: (Int(seconds) ?? 0), to: future)!
    let date = Date.now...future
    let updatedDeliveryStatus = PizzaDeliveryAttributes.PizzaDeliveryStatus(driverName: "Anne Johnson", deliveryTimer: date)
    let alertConfiguration = AlertConfiguration(title: "Delivery Update", body: "Your pizza order will arrive in 25 minutes.", sound: .default)

    Task{
        await deliveryActivity?.update(using: updatedDeliveryStatus, alertConfiguration: alertConfiguration)
    }
}.padding()

Button("End LiveActivity"){
    let finalDeliveryStatus = PizzaDeliveryAttributes.PizzaDeliveryStatus(driverName: "Anne Johnson", deliveryTimer: Date.now...Date())
    Task {
        await deliveryActivity?.end(using:finalDeliveryStatus, dismissalPolicy: .default)
    }
}.padding()