{"id":132,"date":"2020-08-07T05:21:30","date_gmt":"2020-08-07T05:21:30","guid":{"rendered":"http:\/\/localhost\/anviam-blog\/?p=132"},"modified":"2024-09-26T04:30:06","modified_gmt":"2024-09-26T04:30:06","slug":"date-formatter-in-swift","status":"publish","type":"post","link":"https:\/\/anviam.com\/blog\/date-formatter-in-swift\/","title":{"rendered":"Date formatter in swift"},"content":{"rendered":"\r\n
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A Date formatter that converts between dates and their textual representations.<\/strong><\/p>\r\n<\/div><\/div>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n

Date() –<\/strong> <\/p>\r\n\r\n\r\n\r\n

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        var currentTime: Date = Date()<\/p>\r\n<\/div><\/div>\r\n<\/div><\/div>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n

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        Date class always provides us UTC Time. <\/p>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n

        Default format of date object –<\/strong> 2020-07-13 15:09:57 +0000.<\/p>\r\n\r\n\r\n\r\n

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This date is UTC(Universal Time Coordinated) P<\/strong>rior to 1972, this time was called Greenwich Mean Time (GMT)<\/p>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n

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If you want to convert into Local Date use this  method.<\/strong><\/p>\r\n<\/div><\/div>\r\n<\/div><\/div>\r\n<\/div><\/div>\r\n<\/div><\/div>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n

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extension Date {<\/p>\r\n\r\n\r\n\r\n

      func toCurrentTimezone() -> Date {<\/p>\r\n\r\n\r\n\r\n

          let timeZoneDifference = TimeInterval(TimeZone.current.secondsFromGMT())<\/p>\r\n\r\n\r\n\r\n

          return self.addingTimeInterval(timeZoneDifference)<\/p>\r\n\r\n\r\n\r\n

      }<\/p>\r\n\r\n\r\n\r\n

 }<\/p>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n

<\/p>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n

 DateFormatter() – <\/strong><\/p>\r\n\r\n\r\n\r\n

 let formatter = DateFormatter()<\/p>\r\n\r\n\r\n\r\n

Instances of DateFormatter create string representations of Date objects, and convert textual representations of dates and times into Date objects. For user-visible representations of dates and times, DateFormatter provides a variety of localized presets and configuration options. <\/p>\r\n\r\n\r\n\r\n

We take an example of Date Formatter – <\/p>\r\n\r\n\r\n\r\n

\u201cYYYY-MM-dd\u2019T\u2019HH:mm:ss\u201c  – 2020\u201313\u201307T21:10:00<\/p>\r\n\r\n\r\n\r\n

Looking at this, it would seem that the first part is the date (13th July, 2020) and the second part is the time (21:10:00, or 9:10pm in standard time). <\/p>\r\n\r\n\r\n\r\n

After that, the \u201cT\u201d basically serves as a separator, saying \u201cokay, we are transitioning to a time now\u201d and the time is listed in a similar way as date, from large to small (hour:minute:second) with a colon separating each one.<\/p>\r\n\r\n\r\n\r\n

Now we take some examples of DateFormatters – <\/p>\r\n\r\n\r\n\r\n

Suppose we have date string.  –<\/p>\r\n\r\n\r\n\r\n

let input = “2020-13-10T21:29:00Z”  <\/p>\r\n\r\n\r\n\r\n

This is  “yyyy-MM-dd’T’HH:mm:ssZ” format.<\/p>\r\n\r\n\r\n\r\n

The ‘Z’ here refers to the time zone, and if the date<\/p>\r\n\r\n\r\n\r\n

<\/p>\r\n\r\n\r\n\r\n

Time Zone – <\/strong><\/p>\r\n\r\n\r\n\r\n

zzz<\/td>EST<\/td>The 3 letter name of the time zone. Falls back to GMT-08:00 (hour offset) if the name is not known.<\/td><\/tr>
zzzz<\/td>Eastern Standard Time<\/td>The expanded time zone name, falls back to GMT-08:00 (hour offset) if name is not known.<\/td><\/tr>
zzzz<\/td>CST-04:00<\/td>Time zone with abbreviation and offset<\/td><\/tr>
Z<\/td>-0400<\/td>RFC 822 GMT format. Can also match a literal Z for Zulu (UTC) time.<\/td><\/tr>
ZZZZZ<\/td>-04:00<\/td>ISO 8601 time zone format<\/td><\/tr><\/tbody><\/table><\/figure>\r\n\r\n\r\n\r\n

<\/p>\r\n\r\n\r\n\r\n

Get Date from string with particulate format – <\/strong><\/p>\r\n\r\n\r\n\r\n

   let input = “2020-13-10T21:29:00Z”  <\/p>\r\n\r\n\r\n\r\n

   Let date =  getDateFromString(strDate: input, requiredDateFormat: “yyyy-MM-dd’T’HH:mm:ss”)<\/p>\r\n\r\n\r\n\r\n

   func getDateFromString(strDate: String, requiredDateFormat : String) -> Date {<\/p>\r\n\r\n\r\n\r\n

        let dateFormatterGet = DateFormatter()<\/p>\r\n\r\n\r\n\r\n

        dateFormatterGet.timeZone = TimeZone(abbreviation: “UTC”)  <\/p>\r\n\r\n\r\n\r\n

        dateFormatterGet.dateFormat = requiredDateFormat<\/p>\r\n\r\n\r\n\r\n

        return dateFormatterGet.date(from: strDate)!<\/p>\r\n\r\n\r\n\r\n

    }<\/p>\r\n\r\n\r\n\r\n

Note:<\/strong>  dateFormatterGet.timeZone = TimeZone(abbreviation: “UTC”)  \/\/ It is necessary, owing to this, our date will not be impacted by timezone. If we don\u2019t use this , DateFormatter class convert existing dateString  to locale. (Whether it is already converted.)<\/p>\r\n\r\n\r\n\r\n

<\/p>\r\n\r\n\r\n\r\n

Get String from Date for particulate format<\/strong><\/p>\r\n\r\n\r\n\r\n

 func getStringFromDate(date: Date, requiredDateFormat : String) -> String {<\/p>\r\n\r\n\r\n\r\n

        let dateFormatterGet = DateFormatter()<\/p>\r\n\r\n\r\n\r\n

        dateFormatterGet.dateFormat = requiredDateFormat<\/p>\r\n\r\n\r\n\r\n

        dateFormatterGet.timeZone = TimeZone(abbreviation: “UTC”)<\/p>\r\n\r\n\r\n\r\n

        return dateFormatterGet.string(from: date)<\/p>\r\n\r\n\r\n\r\n

    }<\/p>\r\n\r\n\r\n\r\n

<\/p>\r\n\r\n\r\n\r\n

Get String from Date for particulate format with local time zone.<\/strong><\/p>\r\n\r\n\r\n\r\n

static func getStringFromCurrentLocaleDate(date: Date, requiredDateFormat : String) -> String {<\/p>\r\n\r\n\r\n\r\n

        let dateFormatterGet = DateFormatter()<\/p>\r\n\r\n\r\n\r\n

        dateFormatterGet.dateFormat = requiredDateFormat<\/p>\r\n\r\n\r\n\r\n

        dateFormatterGet.locale = NSLocale.current<\/p>\r\n\r\n\r\n\r\n

        return dateFormatterGet.string(from: date)<\/p>\r\n\r\n\r\n\r\n

    }<\/p>\r\n\r\n\r\n\r\n

<\/p>\r\n\r\n\r\n\r\n

Some other expended methods that convert date string from any format to  required format- <\/strong><\/p>\r\n\r\n\r\n\r\n

func convertStringToDate(dateString:String, beforeformat : String, afterFormat : String) -> Date {<\/p>\r\n\r\n\r\n\r\n

    let dateFormatter = DateFormatter()<\/p>\r\n\r\n\r\n\r\n

    dateFormatter.timeZone = TimeZone(abbreviation: “UTC”)<\/p>\r\n\r\n\r\n\r\n

    dateFormatter.dateFormat = beforeformat<\/p>\r\n\r\n\r\n\r\n

    let newDate = dateFormatter.date(from: dateString)<\/p>\r\n\r\n\r\n\r\n

    dateFormatter.dateFormat = afterFormat<\/p>\r\n\r\n\r\n\r\n

    dateFormatter.timeZone = TimeZone.current<\/p>\r\n\r\n\r\n\r\n

    let newDateString = dateFormatter.string(from: newDate!)<\/p>\r\n\r\n\r\n\r\n

    dateFormatter.timeZone = TimeZone(abbreviation: “UTC”)<\/p>\r\n\r\n\r\n\r\n

    let date = dateFormatter.date(from: newDateString)<\/p>\r\n\r\n\r\n\r\n

    return date!<\/p>\r\n\r\n\r\n\r\n

}<\/p>\r\n\r\n\r\n\r\n

func convertStringToDateFormatString(dateString:String, beforeformat : String, afterFormat : String) -> String {<\/p>\r\n\r\n\r\n\r\n

    let dateFormatter = DateFormatter()<\/p>\r\n\r\n\r\n\r\n

    dateFormatter.timeZone = TimeZone(abbreviation: “UTC”)<\/p>\r\n\r\n\r\n\r\n

    dateFormatter.dateFormat = beforeformat<\/p>\r\n\r\n\r\n\r\n

    let newDate = dateFormatter.date(from: dateString)<\/p>\r\n\r\n\r\n\r\n

    let newDateFormatter = DateFormatter()<\/p>\r\n\r\n\r\n\r\n

    newDateFormatter.dateFormat = afterFormat<\/p>\r\n\r\n\r\n\r\n

    newDateFormatter.timeZone = TimeZone(abbreviation: “UTC”)<\/p>\r\n\r\n\r\n\r\n

    let newDateString = newDateFormatter.string(from: newDate!)<\/p>\r\n\r\n\r\n\r\n

    return newDateString<\/p>\r\n\r\n\r\n\r\n

}<\/p>\r\n\r\n\r\n\r\n

<\/p>\r\n\r\n\r\n\r\n

Other DateFomatter class in Swift 5 –<\/strong><\/p>\r\n\r\n\r\n\r\n

When working with date representations in ISO 8601 format, use ISO8601DateFormatter<\/a> instead.<\/p>\r\n\r\n\r\n\r\n

To represent an interval between two NSDate<\/a> objects, use DateIntervalFormatter<\/a> instead.<\/p>\r\n\r\n\r\n\r\n

To represent a quantity of time specified by an NSDateComponents<\/a> object, use DateComponentsFormatter<\/a> instead.<\/p>\r\n\r\n\r\n\r\n

You can get more information about  ISO 8601<\/p>\r\n\r\n\r\n\r\n

you can find more information at https:\/\/en.wikipedia.org\/wiki\/ISO_8601<\/a>.<\/p>\r\n","protected":false},"excerpt":{"rendered":"

A Date formatter that converts between dates and their textual representations. Date() –          var currentTime: Date = Date()         Date class always provides us UTC Time.          Default format of date object – 2020-07-13 15:09:57 +0000. This date is UTC(Universal Time Coordinated) Prior to 1972, this time was called Greenwich […]<\/p>\n","protected":false},"author":3,"featured_media":1959,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anviam"],"rttpg_featured_image_url":{"full":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing.jpg",1024,536,false],"landscape":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing.jpg",1024,536,false],"portraits":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing.jpg",1024,536,false],"thumbnail":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing-150x150.jpg",150,150,true],"medium":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing-300x157.jpg",300,157,true],"large":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing.jpg",800,419,false],"1536x1536":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing.jpg",1024,536,false],"2048x2048":["https:\/\/anviam.com\/blog\/wp-content\/uploads\/2024\/09\/digital-marketing.jpg",1024,536,false]},"rttpg_author":{"display_name":"csharma","author_link":"https:\/\/anviam.com\/blog\/author\/csharma\/"},"rttpg_comment":158,"rttpg_category":"Anviam<\/a>","rttpg_excerpt":"A Date formatter that converts between dates and their textual representations. Date() –          var currentTime: Date = Date()         Date class always provides us UTC Time.          Default format of date object – 2020-07-13 15:09:57 +0000. This date is UTC(Universal Time Coordinated) Prior to 1972, this time was called Greenwich…","_links":{"self":[{"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/posts\/132"}],"collection":[{"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/comments?post=132"}],"version-history":[{"count":1,"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/posts\/132\/revisions"}],"predecessor-version":[{"id":2083,"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/posts\/132\/revisions\/2083"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/media\/1959"}],"wp:attachment":[{"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/media?parent=132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/categories?post=132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/anviam.com\/blog\/wp-json\/wp\/v2\/tags?post=132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}