Question

更新：我正在尝试调用访问HealthKit的函数，并返回当天所执行的步骤数。

我创建了一个函数，现在我试着调用它。该函数的代码如下：

//Reading data from Health app.
func todayTotalSteps (input: String, completion: @escaping (_ stepRetrieved: Double) -> Void){

    // Define the Step Quantity Type.
    let stepsCount = HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)

    // Get the start of the day.
    let date = NSDate()
    let calendar = Calendar(identifier: Calendar.Identifier.gregorian)
    let newDate = calendar.startOfDay(for: date as Date)
    let yesterday = NSCalendar.current.date(byAdding: .day, value: -1, to: Date())
    let now = Date()

    // Set the predicates & interval
    let predicate = HKQuery.predicateForSamples(withStart: newDate as Date, end: NSDate() as Date, options: .strictStartDate)
    let interval: NSDateComponents = NSDateComponents()

    interval.day = 1

    //Perform the Query
    let query = HKStatisticsCollectionQuery(quantityType: stepsCount!, quantitySamplePredicate: predicate, options: [.cumulativeSum], anchorDate: newDate as Date, intervalComponents: interval as DateComponents)
    query.initialResultsHandler = {query, results, error in

        if error != nil {
            // Something went wrong.
            return
        }

        if let  myResults = results{
            myResults.enumerateStatistics(from: yesterday! as Date, to: now as Date){
                statistics, stop in

                if let quantity = statistics.sumQuantity(){
                    let steps = quantity.doubleValue(for: HKUnit.count())

                    print("Steps = \(steps)")
                    completion(steps)
                }
            }
        }
    }
    healthStore.execute(query)


}

我正在创建一个按钮动作，在其中我试图调用todayTotalSteps函数。我在另一个函数中启用了HealthKit权限。在我的iPhone 5上运行应用程序工作正常，直到我添加函数todayTotalSteps和按钮及其动作，然后当我点击我添加的按钮时，我得到以下错误，没有其他任何事情发生。在调试区域中，它说：

＆＃34; HealthkitAccess [267：13336] [query]激活查询时出错：错误Domain = com.apple.healthkit Code = 5＆＃34;授权未确定＆＃34; UserInfo = {NSLocalizedDescription =授权未确定}＆＃34;

按钮功能如下：

@IBAction func getSteps(_ sender: Any) {
    todayTotalSteps(input: "commands"){stepRetrieved in print(stepRetrieved)
}

我正在使用Swift 3，Xcode 8.我是swift的新手，我真的很感激有任何见解让这个工作！谢谢！

Answer 1

@IBAction func getSteps(_ sender: Any) {
    todayTotalSteps(input: "commands") { stepRetrieved in
        print(stepRetrieved) 
    }
}

Answer 2

新的HK要求您在获取任何类型的数据之前请求用户的许可。在他们的新更新中，他们提到：

“重要”iOS 10.0上或之后链接的iOS应用必须包含在其中 Info.plist文件用于数据类型的用法描述键需要访问或它将崩溃。访问和更新HealthKit数据具体而言，它必须包括NSHealthShareUsageDescription和分别为NSHealthUpdateUsageDescription键。“ https://developer.apple.com/reference/healthkit

Swift 3：从Health Kit调用步骤计数查询

2 个答案: