如何将这个日期时间从日期转换?
日期:2016-02-29 12:24:26
至2016年2月29日
到目前为止,这是我的代码,它返回一个nil值:
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy"
dateFormatter.timeZone = NSTimeZone(name: "UTC")
let date: NSDate? = dateFormatter.dateFromString("2016-02-29 12:24:26")
print(date)
格式日期的另一个有趣的可能性。此截图属于苹果App“News”。
代码如下:
let dateFormat1 = DateFormatter()
dateFormat1.dateFormat = "EEEE"
let stringDay = dateFormat1.string(from: Date())
let dateFormat2 = DateFormatter()
dateFormat2.dateFormat = "MMMM"
let stringMonth = dateFormat2.string(from: Date())
let dateFormat3 = DateFormatter()
dateFormat3.dateFormat = "dd"
let numDay = dateFormat3.string(from: Date())
let stringDate = String(format: "%@\n%@ %@", stringDay.uppercased(), stringMonth.uppercased(), numDay)
对于lorenzoliveto提出的替代方案,没什么可补充的。太完美了。
let dateFormat = DateFormatter()
dateFormat.dateFormat = "EEEE\nMMMM dd"
let stringDate = dateFormat.string(from: Date()).uppercased()
Swift - 5.0
let date = Date()
let format = date.getFormattedDate(format: "yyyy-MM-dd HH:mm:ss") // Set output format
extension Date {
func getFormattedDate(format: String) -> String {
let dateformat = DateFormatter()
dateformat.dateFormat = format
return dateformat.string(from: self)
}
}
Swift - 4.0
2018-02-01T19:10:04+00:00
extension Date {
static func getFormattedDate(string: String , formatter:String) -> String{
let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"
let date: Date? = dateFormatterGet.date(from: "2018-02-01T19:10:04+00:00")
print("Date",dateFormatterPrint.string(from: date!)) // Feb 01,2018
return dateFormatterPrint.string(from: date!);
}
}
把它放在扩展中,并像下面这样调用它。它很容易在整个应用程序中使用。
self.getFormattedDate(strDate: "20-March-2019", currentFomat: "dd-MMM-yyyy", expectedFromat: "yyyy-MM-dd")
实现
func getFormattedDate(strDate: String , currentFomat:String, expectedFromat: String) -> String{
let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = currentFomat
let date : Date = dateFormatterGet.date(from: strDate) ?? Date()
dateFormatterGet.dateFormat = expectedFromat
return dateFormatterGet.string(from: date)
}
这是一个完整的日期格式的swift扩展
extension Date {
func getFormattedDate(format: String) -> String {
let dateformat = DateFormatter()
dateformat.dateFormat = format
return dateformat.string(from: self)
}
func getFormattedDate(style: DateFormatter.Style) -> String {
let dateformat = DateFormatter()
dateformat.dateStyle = style
return dateformat.string(from: self)
}
}
使用
myDate.getFormattedDate(style: .medium) //medium, short, full, long
OR
myDate.getFormattedDate(format: "yyyy/MM/dd HH:mm:ss")
如果你想解析"1996-12-19T16:39:57-08:00"的日期,请使用以下格式"yyyy-MM-dd 'HH:mm:ssZZZZZ":
let RFC3339DateFormatter = DateFormatter()
RFC3339DateFormatter.locale = Locale(identifier: "en_US_POSIX")
RFC3339DateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
RFC3339DateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
/* 39 minutes and 57 seconds after the 16th hour of December 19th, 1996 with an offset of -08:00 from UTC (Pacific Standard Time) */
let string = "1996-12-19T16:39:57-08:00"
let date = RFC3339DateFormatter.date(from: string)
来自Apple https://developer.apple.com/documentation/foundation/dateformatter