ios - 如何检查 HealthKit 是否被授权

Question

我想检查 HeathKit 是否已被授权让我读取用户数据，如果我被授权继续进行锻炼，如果没有则弹出警报。但是 requestAuthorizationToShareTypes 似乎总是返回 true？我怎样才能知道用户是否已经授权我？

override func viewDidLoad() {
        super.viewDidLoad()

        //1. Set the types you want to read from HK Store
        let healthKitTypesToRead: [AnyObject?] = [
            HKObjectType.workoutType()
        ]


        //2. If the store is not available (for instance, iPad) return an error and don't go on.

        if !HKHealthStore.isHealthDataAvailable() {
            let error = NSError(domain: "com.myndarc.myrunz", code: 2, userInfo: [NSLocalizedDescriptionKey: "HealthKit is not available in this Device"])
                print(error)

            let alertController = UIAlertController(title: "HealthKit Not Available", message: "It doesn't look like HealthKit is available on your device.", preferredStyle: .Alert)
            presentViewController(alertController, animated: true, completion: nil)
            let ok = UIAlertAction(title: "Ok", style: .Default, handler: { (action) -> Void in  })
            alertController.addAction(ok)
                    }

        //3. Request Healthkit Authorization

        let sampleTypes = Set(healthKitTypesToRead.flatMap { $0 as? HKSampleType })

        healthKitStore.requestAuthorizationToShareTypes(sampleTypes, readTypes: nil) {

            (success, error) -> Void in

            if success {
                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                                                        self.performSegueWithIdentifier("segueToWorkouts", sender: nil)
                                                    });
            } else {
                print(error)
                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                                        self.showHKAuthRequestAlert()
                                    });
            }

        }
    }

或者，我已经尝试过 authorizationStatusForType 并打开它的枚举值，但是我遇到了同样的问题，因为我总是被授权。

Answer 1

您误解了 success 标志在此上下文中的含义。 当 success 为真时，这意味着 iOS 已成功向用户询问有关健康工具包的访问权限。这并不意味着他们用"is"回答了那个问题。

要确定他们是否说是/否，您需要更具体，并询问 health kit 您是否有权读/写您感兴趣的特定类型的数据。 来自 HealthKit 上的苹果文档:

After requesting authorization, your app is ready to access the HealthKit store. If your app has permission to share a data type, it can create and save samples of that type. You should verify that your app has permission to share data by calling authorizationStatusForType: before attempting to save any samples.