将传递的Unix NSDate转换为字符串Swift 4[重复]

我试图将传递的NSDate转换为UILabel的可读日期/时间字符串。由于某些原因,标签在输出中显示了意外的日期。

struct myDateRange{
    var startDate: NSNumber?
    var endDate: NSNumber?
}

func configureDate(date:myDateRange){

    let date = NSDate(timeIntervalSince1970: date.startDate as! TimeInterval)
    let timeFormat = DateFormatter()
    timeFormat.timeStyle = .short
    timeFormat.dateStyle = .short
    let currentTime = "\(timeFormat.string(from: date as Date))"
    timeLabel.text = String(currentTime)
}

输出:

通过:可选(1518393600000)

labeltext:12/23/85,上午10:30

预期:

02/12/18, 12:00