使用 Swift 2 将字符串转换为 NSDate

Question

我正在尝试将字符串转换为 NSDate 这是我的代码

     let strDate = "2015-11-01T00:00:00Z" // "2015-10-06T15:42:34Z"
     let dateFormatter = NSDateFormatter()
     dateFormatter.dateFormat = "yyyy-MM-ddTHH:mm:ssZ"
    print ( dateFormatter.dateFromString( strDate ) )

结果我一直收到 nil

Answer 1

格式字符串中的 "T" 需要用单引号引起来，因此不会被视为符号：

Swift 3.0

let strDate = "2015-11-01T00:00:00Z"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let date = dateFormatter.date(from:strDate)
print("date: \(date!)")

输出：

date: 2015-11-01 00:00:00 +0000

Swift 2.x

let strDate = "2015-11-01T00:00:00Z"
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let date = dateFormatter.dateFromString(strDate)
print("date: \(date!)")

输出：

date: 2015-11-01 00:00:00 +0000

参见：Date Field SymbolTable.

This includes the need to enclose ASCII letters in single quotes if they are intended to represent literal text.

Answer 2

对于 swift 4 和 swift 3.2 更新了答案。

这里提到了所有 Date 相关函数。

希望这些功能对您有用。

1=> 迄今为止的时间戳

func timeStampToDate(_timestamp : String, _dateFormat : String) -> String{

        var LOCAL_TIME_ZONE: Int { return TimeZone.current.secondsFromGMT() }

        var date = Date(timeIntervalSince1970: TimeInterval(_timestamp)!)
        date += TimeInterval(LOCAL_TIME_ZONE as NSNumber)
        let dateFormatter = DateFormatter()
        dateFormatter.timeZone = TimeZone(abbreviation: "GMT") //Set timezone that you want
        dateFormatter.locale = NSLocale.current
        dateFormatter.dateFormat = _dateFormat //Specify your format that you want
        let strDate = dateFormatter.string(from: date)
        return strDate
    }

2=> 日期到字符串

func DateToString(date : Date, dateFormatte : String) -> String {

        let dateFormatter = DateFormatter()

        dateFormatter.dateFormat = dateFormatte

        print("Dateobj: (dateFormatter.string(from: dateObj!))")

        return (dateFormatter.string(from: date as Date))

    }

3=> 迄今为止的字符串

func StringDateToDate(dateString : String, dateFormatte : String) -> Date {

        //let dateString = "Thu, 22 Oct 2015 07:45:17 +0000"

        //let dateFormatte = "EEE, dd MMM yyyy hh:mm:ss +zzzz"

        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = dateFormatte
        let dateObj = dateFormatter.date(from: dateString)
        if dateObj == nil {
            return Date()
        }
        return dateObj!
    }

使用 Swift 2 将字符串转换为 NSDate

Convert String to NSDate with Swift 2

nsdateformatter

ios

swift2