无法使用 HKWorkoutSession 开始锻炼课程答案

【问题标题】：can't start workout session with HKWorkoutSession无法使用 HKWorkoutSession 开始锻炼课程
【发布时间】：2021-05-14 14:19:34
【问题描述】：

我正在尝试使用 session.startActivity 在 Apple Watch 中开始锻炼，但状态仍为 NotStarted (1)。尽管如此，似乎锻炼确实开始了，因为我的应用程序在后台运行，而且我的手表也显示了锻炼符号。后来，当我尝试使用 session.end 停止锻炼时，我收到此错误：

"Unable to transition to the desired state from the NotStarted(1) state (event 6). Allowed transitions from the current state are: {
7 = "<error(7): NotStarted(1) -> Ended(3)>";
1 = "<prepare(1): NotStarted(1) -> Prepared(5)>";
2 = "<start(2): NotStarted(1) -> Running(2)>";"

根据错误消息，我应该能够执行此操作，因为我处于未启动模式（错误 7）。有人可以帮忙吗？我迷路了.... 这是我的代码：

var session: HKWorkoutSession? = nil
var builder: HKLiveWorkoutBuilder!

func workout(state: String) {
    
    do {
        session = try HKWorkoutSession(healthStore: healthStore, configuration: configuration)
        builder = session?.associatedWorkoutBuilder()
    } catch {
        print("error with workout session")
        return
    }
    
    session?.delegate = self
    builder.delegate = self
    builder.dataSource = HKLiveWorkoutDataSource(healthStore: healthStore, workoutConfiguration: configuration)
    
    if (state == "start") {
        session?.startActivity(with: Date())
        builder.beginCollection(withStart: Date()) { (success, error) in
            guard success else {
                print("error with builder")
                return
            }
        }
    } else if (state == "end") {
        session?.end()
    }
}

    func workoutSession(_ workoutSession: HKWorkoutSession, didChangeTo toState:     HKWorkoutSessionState, from fromState: HKWorkoutSessionState, date: Date) {
    print("from state: \(fromState.rawValue)")
    print("to state: \(toState.rawValue)")
    if toState == .ended {
        builder.endCollection(withEnd: Date()) { (success, error) in
            self.builder.finishWorkout { (workout, error) in
            }
        }
    }
    
}

【问题讨论】：

标签： swift apple-watch healthkit watchos

【解决方案1】：

“会话” - 您确定它与开始锻炼的对象是同一个对象吗？

开始后，当您稍后调用锻炼（状态：“停止”）时，您会这样做：

func workout(state: String) {
    
    do {
        session = try HKWorkoutSession(healthStore: healthStore, configuration: configuration)

这将覆盖您现有的会话对象，因此您尝试停止的是另一个会话，该会话从未启动，因此无法停止。

【讨论】：