使用Swift计算HealthKit中的睡眠时间

import HealthKit

let healthStore = HKHealthStore()

// 定义要读取的睡眠数据类型
let sleepType = HKObjectType.categoryType(forIdentifier: .sleepAnalysis)!

// 请求授权
healthStore.requestAuthorization(toShare: nil, read: [sleepType]) { (success, error) in
    if success {
        // 用户已授权，可以开始读取睡眠数据
    } else {
        // 授权失败，处理错误
    }
}

// 创建查询
let query = HKSampleQuery(sampleType: sleepType, predicate: nil, limit: HKObjectQueryNoLimit, sortDescriptors: nil) { (query, results, error) in
    if let sleepSamples = results as? [HKCategorySample] {
        // 处理睡眠数据
        for sample in sleepSamples {
            let startDate = sample.startDate
            let endDate = sample.endDate
            let duration = endDate.timeIntervalSince(startDate)
            
            // 在这里可以对睡眠数据进行进一步处理，如计算总睡眠时间等
        }
    }
}

// 执行查询
healthStore.execute(query)

var totalSleepTime: TimeInterval = 0

for sample in sleepSamples {
    let startDate = sample.startDate
    let endDate = sample.endDate
    let duration = endDate.timeIntervalSince(startDate)
    
    totalSleepTime += duration
}

// 将总睡眠时间转换为小时
let totalSleepTimeInHours = totalSleepTime / 3600