Swift 快速错误“；无法分配类型为'；接口控制器'；输入HKWorkoutSessionLegate'；

我在HealthKit中的watchOS代码测量心率时出现了一条错误消息，在另一个Xcode项目中工作正常。我比较了代码，它们看起来是一样的。文件名为InterfaceController.swift

对于行'self.workoutsession？.delegate=self'我收到红旗错误“无法将'interface controller'类型的值分配给HKworkoutsessionelegate”类型有什么想法吗

下面是函数的代码。最后一段是带有错误的函数（前面的代码用于上下文）。谢谢你的帮助

import WatchKit
import Foundation
import HealthKit


class InterfaceController: WKInterfaceController {

    @IBOutlet var label: WKInterfaceLabel!

    @IBOutlet private weak var heart: WKInterfaceImage!

    @IBOutlet var deviceLabel: WKInterfaceLabel!

    @IBOutlet var startStopButton: WKInterfaceButton!

    let healthStore = HKHealthStore()

    //State of the app - is the workout activated
    var workoutActive = false

    // define the activity type and location
    var workoutSession : HKWorkoutSession?
    let heartRateUnit = HKUnit(fromString: "count/min")
    var anchor = HKQueryAnchor(fromValue: Int(HKAnchoredObjectQueryNoAnchor))


    override func awakeWithContext(context: AnyObject?) {
        super.awakeWithContext(context)
    }

    override func willActivate() {
        super.willActivate()

        guard HKHealthStore.isHealthDataAvailable() == true else {
            label.setText("not available")
            return
        }

        guard let quantityType = HKQuantityType.quantityTypeForIdentifier(HKQuantityTypeIdentifierHeartRate) else {
            displayNotAllowed()
            return
        }

        let dataTypes = Set(arrayLiteral: quantityType)
        healthStore.requestAuthorizationToShareTypes(nil, readTypes: dataTypes) { (success, error) -> Void in
            if success == false {
                self.displayNotAllowed()
            }
        }
    }

    func displayNotAllowed() {
        label.setText("not allowed")
    }

    func workoutSession(workoutSession: HKWorkoutSession, didChangeToState toState: HKWorkoutSessionState, fromState: HKWorkoutSessionState, date: NSDate) {
        switch toState {
        case .Running:
            workoutDidStart(date)
        case .Ended:
            workoutDidEnd(date)
        default:
            print("Unexpected state \(toState)")
        }
    }

    func workoutSession(workoutSession: HKWorkoutSession, didFailWithError error: NSError) {
        // Do nothing for now
        NSLog("Workout error: \(error.userInfo)")
    }

    func workoutDidStart(date : NSDate) {
        if let query = createHeartRateStreamingQuery(date) {
            healthStore.executeQuery(query)
        } else {
            label.setText("cannot start")
        }
    }

    func workoutDidEnd(date : NSDate) {
        if let query = createHeartRateStreamingQuery(date) {
            healthStore.stopQuery(query)
            label.setText("---")
        } else {
            label.setText("cannot stop")
        }
    }

    // MARK: - Actions
    @IBAction func startBtnTapped() {
        if (self.workoutActive) {
            //finish the current workout
            self.workoutActive = false
            self.startStopButton.setTitle("Start")
            if let workout = self.workoutSession {
                healthStore.endWorkoutSession(workout)
            }
        } else {
            //start a new workout
            self.workoutActive = true
            self.startStopButton.setTitle("Stop")
            startWorkout()
        }

    }

    func startWorkout() {
        self.workoutSession = HKWorkoutSession(activityType: HKWorkoutActivityType.CrossTraining, locationType: HKWorkoutSessionLocationType.Indoor)

        self.workoutSession?.delegate = self

        healthStore.startWorkoutSession(self.workoutSession!)
    }

---

self

未实现

HKWorkoutSessionLegate

？您没有显示代码的这一部分

当您实现所需的方法时，您必须进行更改

class InterfaceController:WKInterfaceController{

将来

class InterfaceController:WKInterfaceController，HKWorkoutSessionLegate{

---

这告诉编译器该类实现了该协议。

啊，你是对的。在我从它复制的另一个Xcode项目中，确实包含了我忽略的那一行。在这个Xcode项目中，它现在出现了9个其他红色警报错误：在AppDelegate.swift上，它现在显示出来了使用未声明的类型“WCSessionDelegate”，然后是“使用未解析标识符“HKHealthStore”，再加上“使用未解析标识符“self”。（我将在上面添加代码）。以及“HKWorkoutSessionDelegate不可用”和“HKWorkoutSession不可用”的6个实例在该swift文件上。我已从我的应用程序委托中删除了“WCSessionDelegate”，并添加了“var window:UIWindow？let healthStore=HKHealthStore（）“在interfacecontroller文件的顶部，它已经消除了这些红色错误，只留下了一个‘使用未声明的类型’UIWindow’？我对这是一个新手，所以我想知道如何声明它？您已经回答了第一个错误/问题，但表示感谢，所以我将把它作为已回答的。然后尝试解决这个问题！谢谢Joshua。您可能会这样做的。”必须在类中导入UIKit。UIWindow是UIKit的一部分。