如何在swift 4中跳过精确的小时和分钟时间的舍入

import Foundation

let calendar = Calendar.current

// 获取当前日期和时间
let currentDate = Date()

// 将日期转换为DateComponents对象
let components = calendar.dateComponents([.hour, .minute], from: currentDate)

// 获取小时和分钟
guard let hour = components.hour, let minute = components.minute else {
    fatalError("Failed to retrieve hour and minute")
}

print("当前时间：\(hour)时\(minute)分")

// 舍入小时
let roundedHour = hour + 1

// 舍入分钟
let roundedMinute = (minute / 10) * 10

print("舍入后时间：\(roundedHour)时\(roundedMinute)分")