在HealthKit中查询游泳距离

import HealthKit

// 检查设备是否支持HealthKit
guard HKHealthStore.isHealthDataAvailable() else {
    print("设备不支持HealthKit")
    return
}

// 请求读取游泳距离数据的权限
let healthStore = HKHealthStore()
let distanceType = HKObjectType.quantityType(forIdentifier: .distanceSwimming)!
healthStore.requestAuthorization(toShare: nil, read: [distanceType]) { (success, error) in
    guard success else {
        print("无法获取读取游泳距离数据的权限")
        return
    }

    // 创建查询
    let sampleType = HKSampleType.quantityType(forIdentifier: .distanceSwimming)!
    let query = HKSampleQuery(sampleType: sampleType, predicate: nil, limit: HKObjectQueryNoLimit, sortDescriptors: nil) { (query, samples, error) in
        guard let samples = samples as? [HKQuantitySample], error == nil else {
            print("查询游泳距离数据失败：\(error?.localizedDescription ?? "未知错误")")
            return
        }

        // 处理查询结果
        for sample in samples {
            let distance = sample.quantity.doubleValue(for: HKUnit.meter())
            print("游泳距离：\(distance) 米")
        }
    }

    // 执行查询
    healthStore.execute(query)
}