我沿着教程在https://www.youtube.com/watch?v=AUOoalBwxos
但是，用于启动和结束实时Activity的ActivityKit API已在iOS 16.2中弃用。
我已经弄清楚了如何将start方法更新为新的API，方法是将activity = try? Activity<TimeTrackingAttributes>.request(attributes: attributes, contentState: state, pushType: nil)替换为：

let activityContent = ActivityContent(state: state, staleDate: Calendar.current.date(byAdding: .hour, value: 3, to: Date())!)

do {
    let myActivity = try Activity<TimeTrackingAttributes>.request(attributes: attributes, content: activityContent, pushType: nil)
    print("Requested MyActivity live activity. ID: \(myActivity.id)")
} catch let error {
    print("Error requesting live activity: \(error.localizedDescription)")
}

但是，我在结束使用新API启动的活动时遇到了问题。使用旧的、过时的API，我可以开始和结束我的活动。但是当我使用旧端API时，我得到消息end(using:dismissalPolicy:)' was deprecated in iOS 16.2: Use end(content:dismissalPolicy:) instead。旧的“end”API不会结束使用新的“start”API启动的Activity。
有人能提供一些建议，如何结束一个活的活动与新的ActivityKit API在iOS 16.2？
新API的文档：https://developer.apple.com/documentation/activitykit/activity/end(_:dismissalpolicy:)
旧API的文档：https://developer.apple.com/documentation/activitykit/activity/end(using:dismissalpolicy:)
ContentView的完整代码：

import SwiftUI
import ActivityKit

struct ContentView: View {
    @State private var isTrackingTime: Bool = false
    
    @State private var startTime: Date? = nil
    
    @State private var activity: Activity<TimeTrackingAttributes>? = nil;
    
    var body: some View {
        NavigationView {
            VStack {
                if let startTime {
                    Text(startTime, style: .relative)
                }
                
                Button {
                    isTrackingTime.toggle()
                    
                    if isTrackingTime {
                        startTime = .now
                        
                        // start the live activity
                        let attributes = TimeTrackingAttributes()
                        guard let startTime else { return }
                        let state = TimeTrackingAttributes.ContentState(startTime: startTime)
                        
                        activity = try? Activity<TimeTrackingAttributes>.request(attributes: attributes, contentState: state, pushType: nil)
                        
                        // TODO: how to match the new 'start' API to the new 'end' API ?
//                        let activityContent = ActivityContent(state: state, staleDate: Calendar.current.date(byAdding: .hour, value: 3, to: Date())!)
//                        do {
//                            let myActivity = try Activity<TimeTrackingAttributes>.request(attributes: attributes, content: activityContent, pushType: nil)
//                            print("Requested MyActivity live activity. ID: \(myActivity.id)")
//                        } catch let error {
//                            print("Error requesting live activity: \(error.localizedDescription)")
//                        }
                    } else {
                        // end the live activity
                        guard let startTime else { return }
                        let state = TimeTrackingAttributes.ContentState(startTime: startTime)
                        
                        // TODO: how to match the new 'end' API to the new 'start' API ?
                        Task {
                             await activity?.end(using: state, dismissalPolicy: .immediate)
                        }
                        
                        self.startTime = nil
                    }
                } label: {
                    Text(isTrackingTime ? "STOP" : "START")
                        .fontWeight(.light)
                        .foregroundColor(.white)
                        .frame(width: 200, height: 200)
                        .background(Circle().fill(isTrackingTime ? .red : .green))
                }
                .navigationTitle("Basic Time Tracker")
            }
        }
    }
}

TimeTrackingAttributes的完整代码：

import Foundation
import ActivityKit

struct TimeTrackingAttributes: ActivityAttributes {
    public typealias TimeTrackingStatus = ContentState
    
    public struct ContentState: Codable, Hashable {
        var startTime: Date
    }
}