I am having trouble generating Date objects that match the json output. In http://chartapi.finance.yahoo.com/instrument/1.0/aapl/chartdata;type=quote;range=1y/json - the dates are in the following format "Date": 20151013. In order to get 2015-10-13, first I use Alamofire & SwiftJSON in my API call and JSON parsing. Here are some relevant lines from my code:
let dateInteger = subJson["Date"].int
if dateInteger != nil {
let editedDateInt = dateInteger!
let dateString = NSMutableString(string: "\(editedDateInt)")
dateString.insert("-", at: 4)
dateString.insert("-", at: 7)
chartpoint.date = Formatters.sharedInstance.dateFromString(key: dateString as String) }
// date extension
public class Formatters {
public static let sharedInstance = Formatters()
private let dateKeyFormatter = DateFormatter()
init() { dateKeyFormatter.dateFormat = "yyyy-MM-dd" }
public func dateFromString(key: String?) -> Date? {
guard let key = key else { return nil }
return dateKeyFormatter.date(from: key) }
Problem is the output came up Optional(2015-10-12 16:00:00 +0000). Not quite 2015-10-13 that I was expecting. How do I fix this? Is this related to user's Locale or TimeZone?
Check this out
Swift 3.0
let dateFromServer = "20151013"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyyMMdd"
dateFormatter.timeZone = TimeZone(abbreviation: "GMT")
let date = dateFormatter.date(from: dateFromServer)
dateFormatter.dateFormat = "yyyy-MM-dd"
let finalDate = dateFormatter.string(from: date!)
print(finalDate)
Output:
2015-10-13
As suggested by #rmaddy changed the format style form YYYY to yyyy.
Related
I bet this is simple. I'm trying in Xcode playgrounds to play with getting a string date
let string = "2022-11-27 00:00:00 +0000"
and converting that into a Date object that's formatted like DD-MM-YYYY
func airdateFormat(_ key: String) -> Date? {
let expectedFormat = Date().formatted(.dateTime.day().month(.wide).year())
let date = try! Date(strategy: expectedFormat)
return date
}
I also tried
func airdateFormat(_ key: String) -> Date? {
guard let dateString = self[key] as? String else { return nil }
let dateFormatted = DateFormatter.dateFormat(fromTemplate: "MM-DD-YYYY", options: Int, locale: Locale?)
return dateFormatted().date(from: dateString)
}
}
I'm parsing this Date string from json hence the guard/else statement
You need to use a format that matches your input to parse the string to a Date
If you want to use the DateFormatter
let string = "2022-11-27 12:34:56 +0000"
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss Z"
let date = formatter.date(from: string)
and for recent OS versions you use a FormatStyle
let formatStyle = Date.FormatStyle()
.year(.defaultDigits)
.month(.twoDigits)
.day(.twoDigits)
.hour()
.minute()
.second()
.timeZone()
let date = try formatStyle.parse(string)
I'm trying to parse the following String input "2020-04-05 19:02:02" into Date, which I'm using the following code to do that:
static func getDateFromString(_ dateStr: String) -> Date? {
let dateFormater = DateFormatter()
dateFormater.dateFormat = "yyyy-MM-dd H:mm:ss"
dateFormater.timeZone = TimeZone(identifier: "UTC")
return dateFormater.date(from: dateStr)
}
The problem is that not working, it returns nil
Any suggestion? Thank you
Here you go, this works fine:
In dateString pass data in string format and for dateFormat pass format you want and to choose format use NSDateFormatter:
let expiryDateString = "2020-04-05 19:02:02"
let dateformat = "yyyy-MM-dd HH:mm:ss"
let expireDate = DateHelper.getDateFrom(expireDateString, dateformat)
static func getDateFrom(dateString: String,dateFormat: String) -> Date? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = dateFormat
dateFormatter.timeZone = .current
guard let date = dateFormatter.date(from: dateString) else {return nil}
return date
}
This question already has answers here:
Convert NSDate to NSString
(19 answers)
Closed 5 years ago.
I am trying to convert a NSDate to a String and then Change Format. But when I pass NSDate to String it is producing whitespace.
let formatter = DateFormatter()
let myString = (String(describing: date))
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let yourDate: Date? = formatter.date(from: myString)
formatter.dateFormat = "dd-MMM-yyyy"
print(yourDate)
you get the detail information from Apple Dateformatter Document.If you want to set the dateformat for your dateString, see this link , the detail dateformat you can get here
for e.g , do like
let formatter = DateFormatter()
// initially set the format based on your datepicker date / server String
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let myString = formatter.string(from: Date()) // string purpose I add here
// convert your string to date
let yourDate = formatter.date(from: myString)
//then again set the date format whhich type of output you need
formatter.dateFormat = "dd-MMM-yyyy"
// again convert your date to string
let myStringDate = formatter.string(from: yourDate!)
print(myStringDate)
you get the output as
I always use this code while converting Date to String . (Swift 3)
extension Date
{
func toString( dateFormat format : String ) -> String
{
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = format
return dateFormatter.string(from: self)
}
}
and call like this . .
let today = Date()
today.toString(dateFormat: "dd-MM")
DateFormatter has some factory date styles for those too lazy to tinker with formatting strings. If you don't need a custom style, here's another option:
extension Date {
func asString(style: DateFormatter.Style) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = style
return dateFormatter.string(from: self)
}
}
This gives you the following styles:
short, medium, long, full
Example usage:
let myDate = Date()
myDate.asString(style: .full) // Wednesday, January 10, 2018
myDate.asString(style: .long) // January 10, 2018
myDate.asString(style: .medium) // Jan 10, 2018
myDate.asString(style: .short) // 1/10/18
Your updated code.update it.
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let myString = formatter.string(from: date as Date)
let yourDate: Date? = formatter.date(from: myString)
formatter.dateFormat = "dd-MMM-yyyy"
print(yourDate!)
Something to keep in mind when creating formatters is to try to reuse the same instance if you can, as formatters are fairly computationally expensive to create. The following is a pattern I frequently use for apps where I can share the same formatter app-wide, adapted from NSHipster.
extension DateFormatter {
static var sharedDateFormatter: DateFormatter = {
let dateFormatter = DateFormatter()
// Add your formatter configuration here
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
return dateFormatter
}()
}
Usage:
let dateString = DateFormatter.sharedDateFormatter.string(from: Date())
After allocating DateFormatter you need to give the formatted string
then you can convert as string like this way
var date = Date()
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let myString = formatter.string(from: date)
let yourDate: Date? = formatter.date(from: myString)
formatter.dateFormat = "dd-MMM-yyyy"
let updatedString = formatter.string(from: yourDate!)
print(updatedString)
OutPut
01-Mar-2017
You can use this extension:
extension Date {
func toString(withFormat format: String) -> String {
let formatter = DateFormatter()
formatter.dateFormat = format
let myString = formatter.string(from: self)
let yourDate = formatter.date(from: myString)
formatter.dateFormat = format
return formatter.string(from: yourDate!)
}
}
And use it in your view controller like this (replace <"yyyy"> with your format):
yourString = yourDate.toString(withFormat: "yyyy")
I want this date "2016-10-18 22:06:20 +0000" to "18-10-2016", is this possible? I managed to get the date as follows:
var formatter = DateFormatter()
formatter.dateFormat = "yyy-MM-dd'HH:mm:ss.SSSZ"
let stringDate = formatter.string(from: currentDate)
The above gives me "10/18/16", but how can I get "18-10-2016"?
Solution in Swift 3
extension Foundation.Date {
func dashedStringFromDate() -> String {
let dateFormatter = DateFormatter()
let date = self
dateFormatter.dateFormat = "dd-MM-yyyy"
return dateFormatter.string(from: date)
}
}
Example
let date = Foundation.Date()
let formatedDate = date.dashedStringFromDate()
Little about what you put in your question makes a lot of sense. You don't have a date as 2016-10-18 22:06:20 +0000. The code you posted converts a current Date into a string. But you claim you want that string to be in the format 18-10-2016 but your code uses a completely different format.
Why not just do:
var formatter = DateFormatter()
formatter.dateFormat = "dd-MM-yyyy"
let stringDate = formatter.string(from: currentDate)
This will convert the currentDate to a string in the format you mention in your question.
If you really have a string in the format of 2016-10-18 22:06:20 +0000 and you want to convert it to 18-10-2016, then you want two date formatters.
The first convert that original string to a date:
let string = "2016-10-18 22:06:20 +0000"
let formatter1 = DateFormatter()
formatter1.locale = Locale(identifier: "en_US_POSIX") // if this string was from web service or a database, you should set the locale
formatter1.dateFormat = "yyyy-MM-dd HH:mm:ss Z"
guard let date = formatter1.date(from: string) else {
fatalError("Couldn't parse original date string")
}
If you then want to build a new string in the format of 18-10-2016, then you'd use a second formatter:
let formatter2 = DateFormatter()
formatter2.dateFormat = "dd-MM-yyyy"
let result = formatter2.string(from: date)
Is any way to print full date with milliseconds?
For example, I'm doing this:
print("\(NSDate())")
But I'm just get this:
2016-05-09 22:07:19 +0000
How can I get the milliseconds too in the full date?
Updated for Swift 3
let d = Date()
let df = DateFormatter()
df.dateFormat = "y-MM-dd H:mm:ss.SSSS"
df.string(from: d) // -> "2016-11-17 17:51:15.1720"
When you have a Date d, you can get the formatted string using a NSDateFormatter. You can also use a formatter to turn a string date based on your format into a Date
See this chart for more on what dateFormat can do http://waracle.net/iphone-nsdateformatter-date-formatting-table/
Swift 5 to/from Timestamp String Extension
extension String {
static func timestamp() -> String {
let dateFMT = DateFormatter()
dateFMT.locale = Locale(identifier: "en_US_POSIX")
dateFMT.dateFormat = "yyyyMMdd'T'HHmmss.SSSS"
let now = Date()
return String(format: "%#", dateFMT.string(from: now))
}
func tad2Date() -> Date? {
let dateFMT = DateFormatter()
dateFMT.locale = Locale(identifier: "en_US_POSIX")
dateFMT.dateFormat = "yyyyMMdd'T'HHmmss.SSSS"
return dateFMT.date(from: self)
}
}