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)
当前回答
import UIKit
// Example iso date time
let isoDateArray = [
"2020-03-18T07:32:39.88Z",
"2020-03-18T07:32:39Z",
"2020-03-18T07:32:39.8Z",
"2020-03-18T07:32:39.88Z",
"2020-03-18T07:32:39.8834Z"
]
let dateFormatterGetWithMs = DateFormatter()
let dateFormatterGetNoMs = DateFormatter()
// Formater with and without millisecond
dateFormatterGetWithMs.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
dateFormatterGetNoMs.dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'"
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"
for dateString in isoDateArray {
var date: Date? = dateFormatterGetWithMs.date(from: dateString)
if (date == nil){
date = dateFormatterGetNoMs.date(from: dateString)
}
print("===========>",date!)
}
其他回答
import UIKit
// Example iso date time
let isoDateArray = [
"2020-03-18T07:32:39.88Z",
"2020-03-18T07:32:39Z",
"2020-03-18T07:32:39.8Z",
"2020-03-18T07:32:39.88Z",
"2020-03-18T07:32:39.8834Z"
]
let dateFormatterGetWithMs = DateFormatter()
let dateFormatterGetNoMs = DateFormatter()
// Formater with and without millisecond
dateFormatterGetWithMs.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
dateFormatterGetNoMs.dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'"
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"
for dateString in isoDateArray {
var date: Date? = dateFormatterGetWithMs.date(from: dateString)
if (date == nil){
date = dateFormatterGetNoMs.date(from: dateString)
}
print("===========>",date!)
}
Swift 3版本用新的Date对象代替NSDate:
let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd HH:mm:ss"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM dd,yyyy"
let date: Date? = dateFormatterGet.date(from: "2017-02-14 17:24:26")
print(dateFormatter.string(from: date!))
编辑:在mitul-nakum建议之后
15、0 +。
iPadOS 15 . 0 +
macOS 12 . 0 +
Mac Catalyst 15.0+，
tvOS 15.0+，
watchOS 8.0+，
Xcode 13.0+
使用格式化(日期:时间:)
let now = Date.now
let date = now.formatted(date: .abbreviated, time: .omitted)
你可以使用另一种DateStyle，如.long， .numeric或定义自定义格式，而不是。缩写。
迅捷用户界面
Text(myDate, format: Date.FormatStyle(date: .numeric, time: .omitted))
或者简单地使用:
Text(myDate, style: .date)
参考
格式化(日期:时间:)
init() _:格式:
文本。DateStyle
Swift 4、4.2和5
func getFormattedDate(date: Date, format: String) -> String {
let dateformat = DateFormatter()
dateformat.dateFormat = format
return dateformat.string(from: date)
}
let formatingDate = getFormattedDate(date: Date(), format: "dd-MMM-yyyy")
print(formatingDate)
只需使用以下函数转换日期格式:-
let convertedFormat = convertToString(dateString: "2019-02-12 11:23:12", formatIn: "yyyy-MM-dd hh:mm:ss", formatOut: "MMM dd, yyyy") //calling function
print(convertedFormat) // feb 12 2019
func convertToString (dateString: String, formatIn : String, formatOut : String) -> String {
let dateFormater = DateFormatter()
dateFormater.timeZone = NSTimeZone(abbreviation: "UTC") as TimeZone!
dateFormater.dateFormat = formatIn
let date = dateFormater.date(from: dateString)
dateFormater.timeZone = NSTimeZone.system
dateFormater.dateFormat = formatOut
let timeStr = dateFormater.string(from: date!)
return timeStr
}
