两个时间间隔 ios 分量之间的差异 swift 3

Question

我有两个时间间隔，基本上我想转换找出它们之间的区别这是我的代码。但是，它不起作用

 func dateformatter(date:Double) -> String {

    let timeElapsed:TimeInterval = TimeInterval(Int(date))
    let timeNow:TimeInterval = TimeInterval(integerLiteral: Int64(Date().timeIntervalSince1970*1000))

    let date2:Date = Date(timeIntervalSince1970: timeElapsed )
    let date1:Date = Date(timeIntervalSince1970: timeNow )

    let calender:Calendar = Calendar.current
    let components:DateComponents = calender.dateComponents([.year, .month, .day, .hour, .minute], from: date1, to: date2)
    var returnString:String = ""
    print(components.second)
    if components.second! < 60 {
        returnString = "Just Now"
    }else if components.minute! >= 1{
        returnString = String(describing: components.minute) + " min ago"
    }else if components.hour! >= 1{
        returnString = String(describing: components.hour) + " hour ago"
    }else if components.day! >= 1{
        returnString = String(describing: components.day) + " days ago"
    }else if components.month! >= 1{
        returnString = String(describing: components.month)+" month ago"
    }else if components.year! >= 1 {
        returnString = String(describing: components.year)+" year ago"
    }
    return returnString
}

Answer 1

不需要您在函数开头进行的所有转换。 Date(timeIntervalSince1970:) 接受 NSTimeInterval，但是，对于 double 它只是一个 typealias。

此外，因为您的第一个 if 语句检查 seconds，您需要将 .seconds 包含到组件参数列表中。

您可以执行以下操作：

func dateformatter(date: Double) -> String {

    let date1:Date = Date() // Same you did before with timeNow variable
    let date2: Date = Date(timeIntervalSince1970: date)

    let calender:Calendar = Calendar.current
    let components: DateComponents = calender.dateComponents([.year, .month, .day, .hour, .minute, .second], from: date1, to: date2)
    print(components)
    var returnString:String = ""
    print(components.second)
    if components.second! < 60 {
        returnString = "Just Now"
    }else if components.minute! >= 1{
        returnString = String(describing: components.minute) + " min ago"
    }else if components.hour! >= 1{
        returnString = String(describing: components.hour) + " hour ago"
    }else if components.day! >= 1{
        returnString = String(describing: components.day) + " days ago"
    }else if components.month! >= 1{
        returnString = String(describing: components.month)+" month ago"
    }else if components.year! >= 1 {
        returnString = String(describing: components.year)+" year ago"
    }
    return returnString
}

Answer 2

提示，您的逻辑中存在一个错误，导致函数 return "Just now" 在每种情况下都如此。所以这是修改后的代码：

func timeElapsed(date: Date) -> String {

        let date1:Date = date
        let date2: Date = Date() // Same you did before with timeNow variable

        let calender:Calendar = Calendar.current
        let components: DateComponents = calender.dateComponents([.year, .month, .day, .hour, .minute, .second], from: date1, to: date2)
        print(components)
        var returnString:String = ""

        print(components.second!)

        if components.second! < 60 {
            returnString = "Just Now"
        }

        if components.minute! > 1{
            returnString = String(describing: components.minute!) + " mins ago"
        }
        else if components.minute! == 1 {

            returnString = "A minute ago"
        }

        if components.hour! > 1{
            returnString = String(describing: components.hour!) + " hours ago"
        }
        else if components.hour == 1 {

            returnString = "An hour ago"
        }

        if components.day! > 1{
            returnString = String(describing: components.day!) + " days ago"
        }
        else if components.day! == 1 {

            returnString = "Yesterday"
        }

        if components.month! > 1{
            returnString = String(describing: components.month!)+" months ago"
        }
        else if components.month! == 1 {

            returnString = "A month ago"
        }

        if components.year! > 1 {
            returnString = String(describing: components.year!)+" years ago"
        }
        else if components.year! == 1 {

            returnString = "A year ago"
        }

        return returnString
    }

两个时间间隔 ios 分量之间的差异 swift 3

difference between two time interval ios components swift 3

date

nstimeinterval

ios

swift3