用给定数字制作日期

Question

我有以下Swift(Swift 3)函数来生成一个Date带日期components(DateComponents)的date().

func makeDate(year: Int, month: Int, day: Int, hr: Int, min: Int, sec: Int) -> NSDate {
    let calendar = NSCalendar(calendarIdentifier: .gregorian)!
    let components = NSDateComponents()
    components.year = year
    components.month = month
    components.day = day
    components.hour = hr
    components.minute = min
    components.second = sec
    let date = calendar.date(from: components as DateComponents)
    return date! as NSDate
}

如果我使用它,它将返回GMT日期.

override func viewDidLoad() {
    super.viewDidLoad()
    let d = makeDate(year: 2017, month: 1, day: 8, hr: 22, min: 16, sec: 50)
    print(d) // 2017-01-08 13:16:50 +0000
}

我真正希望返回的是一个基于这些数字的日期(2017-01-08 22:16:50).我怎么能这样做DateComponents？谢谢.

Answer 1

该函数确实返回正确的日期.它print是以UTC显示日期的功能.

顺便说一下,你的函数的原生 Swift 3版本是

func makeDate(year: Int, month: Int, day: Int, hr: Int, min: Int, sec: Int) -> Date {
    var calendar = Calendar(identifier: .gregorian)
    // calendar.timeZone = TimeZone(secondsFromGMT: 0)!
    let components = DateComponents(year: year, month: month, day: day, hour: hr, minute: min, second: sec)
    return calendar.date(from: components)!
}

但是,如果您确实希望拥有UTC日期,请取消注释该行以设置时区.