从2016-02-10 00:00:00之类的日期删除时间

Question

你好,我有这样的约会

2016-02-10 00:00:00

我想以这种方式得到它的日期

14.05.2016 or 14-05-2016

这就是我尝试过的

let dateFormatter = NSDateFormatter()
let date = "2016-02-10 00:00:00"
dateFormatter.dateFormat = "dd-MM-yyyy"
let newdate = dateFormatter.dateFromString(date)
print(newdate) //nil is coming

Answer 1

比建议版本更好的方法是不使用字符串格式化程序从日期转换,而是使用日历:

public func removeTimeStamp(fromDate: Date) -> Date {
    guard let date = Calendar.current.date(from: Calendar.current.dateComponents([.year, .month, .day], from: fromDate)) else {
        fatalError("Failed to strip time from Date object")
    }
    return date
}

Answer 2

在日期上使用扩展名：

extension Date {
    public var removeTimeStamp : Date? {
       guard let date = Calendar.current.date(from: Calendar.current.dateComponents([.year, .month, .day], from: self)) else {
        return nil
       }
       return date
   }
}

用法：

let now = Date()
let nowWithouTime = now.removeTimeStamp

Answer 3

好的，我自己解决了这个问题

  let date = "2016-02-10 00:00:00"
  let dateFormatter = NSDateFormatter()

  dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss"
  let dateFromString : NSDate = dateFormatter.dateFromString(date)!
  dateFormatter.dateFormat = "dd-MM-yyyy"
  let datenew= dateFormatter.stringFromDate(dateFromString)

    print(datenew)

Answer 4

斯威夫特 5.5+

使用formatted(_:)

let now = Date.now
let date = now.formatted(.iso8601.year().month().day().dateSeparator(.dash))

或者formatted(date:time:)

let now = Date.now
let date = now.formatted(date: .abbreviated, time: .omitted)

.abbreviated您可以使用 DateStyle 例如.long, 或来代替.numeric。

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