iOS的睡眠功能是什么

iOS的睡眠功能是指iPhone或iPad设备上的一项功能，它可以帮助用户更好地管理自己的睡眠时间，并提供更好的睡眠质量。睡眠功能的出现是为了解决现代人常常面临的睡眠问题，如失眠、睡眠不足等。通过提供定时提醒、夜间模式、放松音乐等功能，iOS的睡眠功能可以帮助用户建立规律的作息时间，调整睡眠环境，提高睡眠质量。

swift
import UIKit
import HealthKit
class SleepManager {
    
    let healthStore = HKHealthStore()
    
    func setSleepSchedule(bedtime: Date, wakeupTime: Date) {
        guard HKHealthStore.isHealthDataAvailable() else {
            print("Health data is not available.")
            return
        }
        
        let sleepType = HKObjectType.categoryType(forIdentifier: .sleepAnalysis)!
        
        healthStore.requestAuthorization(toShare: nil, read: [sleepType]) { (success, error) in
            if let error = error {
                print("Error requesting authorization for sleep analysis: \(error.localizedDescription)")
                return
            }
            
            let sleepSchedule = HKCategorySample(type: sleepType, value: HKCategoryValueSleepAnalysis.inBed.rawValue, start: bedtime, end: wakeupTime)
            
            self.healthStore.save(sleepSchedule) { (success, error) in
                if let error = error {
                    print("Error saving sleep schedule: \(error.localizedDescription)")
                    return
                }
                
                print("Sleep schedule saved successfully.")
            }
        }
    }
}