如何从 healthkit 框架中读取上次更新的洗手数据？

Posted 2023-03-10

【中文标题】如何从 healthkit 框架中读取上次更新的洗手数据？

【英文标题】：How to read last updated hand-wash data from healthkit framework?

【发布时间】：2020-12-03 10:10:11

【问题描述】：

我使用以下代码从 healthkit 中获取洗手数据。我使用下面的查询/示例数据查询来检索上次更新的洗手数据，但返回 nil。

func readMostRecentSample(for type: HKSampleType, completion: @escaping (HKQuantitySample?, Error?) -> Void) 
            print("read query function calling")
            let predicate = HKQuery.predicateForSamples(withStart: Date.distantPast, end: Date(), options: .strictEndDate)
            let mostRecentSortDescriptor = NSSortDescriptor(key: HKSampleSortIdentifierStartDate, ascending: false)
            let sampleQuery = HKSampleQuery(sampleType: type, predicate: predicate, limit: 1, sortDescriptors: [mostRecentSortDescriptor])  (query, result, error) in
                
                DispatchQueue.main.async 
                    guard let samples = result as? [HKQuantitySample], let sample = samples.first else 
                        completion(nil, error)
                        print("HKit error: \(String(describing: error?.localizedDescription))")
    
                        return
                    
                    completion(sample, nil)
                    print("read HKsample :: \(sample.quantity)")
                    print("read HKsample :: \(sample.quantityType)")
    
                
            
            print("read query end calling")
    
            healthStore.execute(sampleQuery)
            

    HealthKitDataStore.sharedInstance.readMostRecentSample(for: handWashCount)  (sample, error) in
                    
                    print("hand_washError \(String(describing: error?.localizedDescription))")

                
                print("hand_washsampledata \(sample.debugDescription)")
                if let sample = sample
                    
                    self.patientVital.hand_wash = "\(sample.quantity.doubleValue(for: HKUnit.init(from: "count/day")))"
                    print("hand_wash\(sample.count)")
                    print("hand_wash\(sample.quantity.is(compatibleWith: HKUnit.init(from: "count/day")))")
                    print("hand_wash\(sample.quantity.is(compatibleWith: HKUnit.init(from: "count/day")))")
    
                    print("hand_wash: \(self.patientVital.pulsebpm ?? "no data")")
                
            

没有收到数据。 请对此提供一些见解...

【参考方案1】：

我知道这已经很晚了，但发布这可能会帮助其他正在寻求解决方案的人。

洗手事件是HKCategory 的实例，因此样本是HKCategorySample 的对象。但你想成为HKQuantitySample。

这是我尝试过的，它按预期工作。

public struct HealthDataManager 
    private let healthStore: HKHealthStore

    public static let shared = HealthDataManager()

    public init() 
        healthStore = HKHealthStore()
    

    public func readRecentHandWash(for date: Date, completion: @escaping (HKSample?, Error?) -> Void) 
    
        guard HKHealthStore.isHealthDataAvailable() else 
            print("Healthkit is not available.")
            return
        
    
        guard let handWash = HKCategoryType.categoryType(forIdentifier: HKCategoryTypeIdentifier.handwashingEvent) else 
            fatalError("*** Unable to get handwashingEvent on this device ***")
        
    
        healthStore.requestAuthorization(toShare: nil, read: [handWash])  (success, error) in
                        
            let predicate = HKQuery.predicateForSamples(withStart: Date.distantPast, end: Date(), options: .strictEndDate)
            let query = HKSampleQuery(sampleType: handWash,
                                      predicate: predicate,
                                      limit: HKObjectQueryNoLimit,
                                      sortDescriptors: [NSSortDescriptor(key: HKSampleSortIdentifierStartDate, ascending: false)])  (query, samples, error) in
                
                DispatchQueue.main.async 
                    
                    if let err = error 
                        completion(nil, err)
                     else 
                        guard let actualSamples = samples else 
                            completion(nil, error) // Here you will not get any error, but you have no data, so you have to pass custom error object that shows no data found.
                            return
                        
                        
                        completion(actualSamples.first, nil)
                    
                
            
            healthStore.execute(query)
        
    

当你应该调用这个方法时：

HealthDataManager.shared.readRecentHandWash(for: Date())  (sample, error) in
        
    var str = ""
        
    if let washSample = sample as? HKCategorySample 
                                
        str = str.appendingFormat("\n\(washSample.categoryType)")
        let diffComponents = Calendar.current.dateComponents([.minute, .second], from: washSample.startDate, to: washSample.endDate)
        let minutes = diffComponents.minute
        let seconds = diffComponents.second

        if let mins = minutes, mins > 0 
            str = str + " : " + "\(mins)" + " min"
            if let secs = seconds, secs > 0 
                str = str + " " + "\(secs)" + " secs"
            
         else if let secs = seconds, secs > 0 
            str = str + " : " + "\(secs)" + " secs"
        
            
        print("Most Recent : ", str)