Swift iOS doRelativeDate格式具有不同的值，除了“今天”和“昨天” [英] Swift iOS doesRelativeDateFormatting have different values besides "Today" and "Yesterday"?

问题描述

我有一些日期，我正在使用相对日期，如今天，昨天，1周前，1个月前等等。

这是我使用的Swift代码：

  let dateFormatter = NSDateFormatter（）
 dateFormatter.dateStyle = .MediumStyle 
 dateFormatter.doesRelativeDateFormatting = true 
 let uploadDate = dateFormatter.stringFromDate（date）
  

只有今天和昨天被表示，其余日期如下所示：
2014年11月24日
2014年11月17日
etc ... <

解决方案

是否有另一种方式来表示所有的日期， / div>

更新： Xcode 8•Swift 3

如果您使用扩展程序和NSCalendar来帮助您，日期计算，您应该如下：

 延期日期{
 func ye ars（from date：Date） - > Int {
 return Calendar.current.dateComponents（[。year]，from：date，to：self）.year？ 0 
} 
 func months（from date：Date） - > Int {
 return Calendar.current.dateComponents（[。month]，from：date，to：self）.month？ 0 
} 
 func周（从日期：日期） - > Int {
 return Calendar.current.dateComponents（[。weekOfYear]，from：date，to：self）.weekOfYear？ 0 
} 
 func days（from date：Date） - > Int {
 return Calendar.current.dateComponents（[。day]，from：date，to：self）.day？ 0 
} 
 func hours（from date：Date） - > Int {
 return Calendar.current.dateComponents（[。hour]，from：date，to：self）.hour？ 0 
} 
 func minutes（from date：Date） - > Int {
 return Calendar.current.dateComponents（[。minute]，from：date，to：self）.minute？ 0 
} 
 func seconds（from date：Date） - > Int {
 return Calendar.current.dateComponents（[。second]，from：date，to：self）.second？ 0 
} 
 var relativeTime：String {
 let now = Date（）
 if now.years（from：self）> 0 {
 return now.years（from：self）.description +year+ {return now.years（from：self）> 1？ s：}（）+前
} 
 if now.months（from：self）> 0 {
 return now.months（from：self）.description +month+ {return now.months（from：self）> 1？ s：}（）+ago
} 
 if now.weeks（from：self）> 0 {
 return now.weeks（from：self）.description +week+ {return now.weeks（from：self）> 1？ s：}（）+前
} 
 if now.days（from：self）> 0 {
 if now.days（from：self）== 1 {returnYesterday} 
 return now.days（from：self）.description +days ago
} 
 if now.hours（from：self）> 0 {
 return\（now.hours（from：self））小时+ {return now.hours（from：self）> 1？ s：}（）+ago
} 
 if now.minutes（from：self）> 0 {
 return\（now.minutes（from：self））minute+ {return now.minutes（from：self）> 1？ s：}（）+ago
} 
 if now.seconds（from：self）> 0 {
 if now.seconds（from：self）< 15 {returnJust now} 
 return\（now.seconds（from：self））second+ {return now.seconds（from：self）> 1？ s：}（）+前
} 
返回
} 
} 
  

测试

  let cal = Calendar （标识符：.gregorian）
 
 
 let date1 = cal.date（from：DateComponents（year：2015，month：6，day：14，hour：22，minute：39）） ！ 
 let date2 = cal.date（from：DateComponents（year：2016，month：9，day：18，hour：22，minute：39））！ 
 let date3 = cal.date（from：DateComponents（year：2016，month：10，day：2，hour：12，minute：38））！ 
 let date4 = cal.date（from：DateComponents（year：2016，month：10，day：3，hour：15，minute：41））！ 
 let date5 = cal.date（from：DateComponents（year：2016，month：10，day：3，hour：16，minute：9））！ 
 
 let timeOffset1 = date1.relativeTime //1年前
 let timeOffset2 = date2.relativeTime //2 weeks ago
 let timeOffset3 = date3.relativeTime // Yesterday
 let timeOffset4 = date4.relativeTime //28分钟前
 let timeOffset5 = date5.relativeTime //Just now
  

I have a number of dates that I am trying to represent using a relative date such as "Today, Yesterday, 1 week ago, 1 month ago" etc...

This is the Swift code I am using:

let dateFormatter = NSDateFormatter()
dateFormatter.dateStyle = .MediumStyle
dateFormatter.doesRelativeDateFormatting = true
let uploadDate = dateFormatter.stringFromDate(date)

Only "Today" and "Yesterday" are represented and the rest of the dates appear like the below: Nov 24, 2014 Nov 17, 2014 etc...

Is there another way to represent all the dates using relative dating instead of the actual dates?

解决方案

Update: Xcode 8 • Swift 3

It is really easy if you use extensions and NSCalendar to help you with your date calculations, you should do as follow:

extension Date {
    func years(from date: Date) -> Int {
        return Calendar.current.dateComponents([.year], from: date, to: self).year ?? 0
    }
    func months(from date: Date) -> Int {
        return Calendar.current.dateComponents([.month], from: date, to: self).month ?? 0
    }
    func weeks(from date: Date) -> Int {
        return Calendar.current.dateComponents([.weekOfYear], from: date, to: self).weekOfYear ?? 0
    }
    func days(from date: Date) -> Int {
        return Calendar.current.dateComponents([.day], from: date, to: self).day ?? 0
    }
    func hours(from date: Date) -> Int {
        return Calendar.current.dateComponents([.hour], from: date, to: self).hour ?? 0
    }
    func minutes(from date: Date) -> Int {
        return Calendar.current.dateComponents([.minute], from: date, to: self).minute ?? 0
    }
    func seconds(from date: Date) -> Int {
        return Calendar.current.dateComponents([.second], from: date, to: self).second ?? 0
    }
    var relativeTime: String {
        let now = Date()
        if now.years(from: self)   > 0 {
            return now.years(from: self).description  + " year"  + { return now.years(from: self)   > 1 ? "s" : "" }() + " ago"
        }
        if now.months(from: self)  > 0 {
            return now.months(from: self).description + " month" + { return now.months(from: self)  > 1 ? "s" : "" }() + " ago"
        }
        if now.weeks(from:self)   > 0 {
            return now.weeks(from: self).description  + " week"  + { return now.weeks(from: self)   > 1 ? "s" : "" }() + " ago"
        }
        if now.days(from: self)    > 0 {
            if now.days(from:self) == 1 { return "Yesterday" }
            return now.days(from: self).description + " days ago"
        }
        if now.hours(from: self)   > 0 {
            return "\(now.hours(from: self)) hour"     + { return now.hours(from: self)   > 1 ? "s" : "" }() + " ago"
        }
        if now.minutes(from: self) > 0 {
            return "\(now.minutes(from: self)) minute" + { return now.minutes(from: self) > 1 ? "s" : "" }() + " ago"
        }
        if now.seconds(from: self) > 0 {
            if now.seconds(from: self) < 15 { return "Just now"  }
            return "\(now.seconds(from: self)) second" + { return now.seconds(from: self) > 1 ? "s" : "" }() + " ago"
        }
        return ""
    }
}

Testing

let cal =  Calendar(identifier: .gregorian)


let date1 = cal.date(from: DateComponents(year: 2015, month:  6, day: 14, hour: 22, minute: 39))!
let date2 = cal.date(from: DateComponents(year: 2016, month:  9, day: 18, hour: 22, minute: 39))!
let date3 = cal.date(from: DateComponents(year: 2016, month: 10, day:  2, hour: 12, minute: 38))!
let date4 = cal.date(from: DateComponents(year: 2016, month: 10, day:  3, hour: 15, minute: 41))!
let date5 = cal.date(from: DateComponents(year: 2016, month: 10, day:  3, hour: 16, minute:  9))!

let timeOffset1 = date1.relativeTime // "1 year ago"
let timeOffset2 = date2.relativeTime // "2 weeks ago"
let timeOffset3 = date3.relativeTime // "Yesterday"
let timeOffset4 = date4.relativeTime // "28 minutes ago"
let timeOffset5 = date5.relativeTime // "Just now"

这篇关于Swift iOS doRelativeDate格式具有不同的值，除了“今天”和“昨天”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！