对于iOS健康工具包，如何保存收缩压和舒张压值？

Question

以下是在健康工具包中保存血压数据的代码

 HKUnit *BPunit = [HKUnit millimeterOfMercuryUnit];
 HKQuantity *BPSysQuantity = [HKQuantity quantityWithUnit:BPunit doubleValue:150.0];
 HKQuantityType *BPSysType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBloodPressureSystolic];
 HKQuantitySample *BPSysSample = [HKQuantitySample quantitySampleWithType:BPSysType quantity:BpsysQuantity startDate:now endDate:now];
 [self.healthStore saveObject:BPSysSample withCompletion:^(BOOL success, NSError *error) 

舒张压也是一样，

但是，如何在健康应用程序中将两者合并为单一条目呢？目前，两个不同的条目保存在健康应用中的收缩压和舒张压。

Answer 1

- (void)saveBloodPressureIntoHealthStore:(double)Systolic Dysbp:(double)Diastolic {

HKUnit *BloodPressureUnit = [HKUnit millimeterOfMercuryUnit];

HKQuantity *SystolicQuantity = [HKQuantity quantityWithUnit:BloodPressureUnit doubleValue:Systolic];
HKQuantity *DiastolicQuantity = [HKQuantity quantityWithUnit:BloodPressureUnit doubleValue:Diastolic];

HKQuantityType *SystolicType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBloodPressureSystolic];
HKQuantityType *DiastolicType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBloodPressureDiastolic];

NSDate *now = [NSDate date];

HKQuantitySample *SystolicSample = [HKQuantitySample quantitySampleWithType:SystolicType quantity:SystolicQuantity startDate:now endDate:now];
HKQuantitySample *DiastolicSample = [HKQuantitySample quantitySampleWithType:DiastolicType quantity:DiastolicQuantity startDate:now endDate:now];

NSSet *objects=[NSSet setWithObjects:SystolicSample,DiastolicSample, nil];
HKCorrelationType *bloodPressureType = [HKObjectType correlationTypeForIdentifier:
                                 HKCorrelationTypeIdentifierBloodPressure];
HKCorrelation *BloodPressure = [HKCorrelation correlationWithType:bloodPressureType startDate:now endDate:now objects:objects];
                                [self.healthStore saveObject:BloodPressure withCompletion:^(BOOL success, NSError *error) {
    if (!success) {
        NSLog(@"An error occured saving the height sample %@. In your app, try to handle this gracefully. The error was: %@.", BloodPressure, error);
        abort();
    }
    [_activity stopAnimating];
    UIAlertView *savealert=[[UIAlertView alloc]initWithTitle:@"HealthDemo" message:@"Blood Pressure values has been saved to Health App" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [savealert show];

}];
}

Answer 2

在Swift 3中

func saveBloodPressure(systolic systolicValue: Double, diastolic diastolicValue: Double, completion completionBlock: @escaping (Bool, Error?) -> Void) {
    let unit = HKUnit.millimeterOfMercury()

    let systolicQuantity = HKQuantity(unit: unit, doubleValue: systolicValue)
    let diastolicQuantity = HKQuantity(unit: unit, doubleValue: diastolicValue)

    let systolicType = HKQuantityType.quantityType(forIdentifier: .bloodPressureSystolic)!
    let diastolicType = HKQuantityType.quantityType(forIdentifier: .bloodPressureDiastolic)!

    let nowDate = Date()
    let systolicSample = HKQuantitySample(type: systolicType, quantity: systolicQuantity, start: nowDate, end: nowDate)
    let diastolicSample = HKQuantitySample(type: diastolicType, quantity: diastolicQuantity, start: nowDate, end: nowDate)

    let objects: Set<HKSample> = [systolicSample, diastolicSample]
    let type = HKObjectType.correlationType(forIdentifier: .bloodPressure)!
    let correlation = HKCorrelation(type: type, start: nowDate, end: nowDate, objects: objects)

    self.healthKitStore.save(correlation) { (success, error) -> Void in
        if !success {
            print("An error occured saving the Blood pressure sample \(systolicSample). In your app, try to handle this gracefully. The error was: \(error).")
        }
        completionBlock(success, error)
    }
}

Answer 3

查看HKCorrelation.关联是一组相关的对象，被设计用来表示血压读数和食物。您可以像示例一样保存、创建和保存相关性，并且可以使用HKCorrelationQuery.查询相关性。