Get current NSDate in timestamp format

Question

I have a basic method which gets the current time and sets it in a string  However  how can I get it to format the current date  amp  time in a UNIX since-1970 timestamp format   Here is my code   NSDate  currentTime    NSDate date   NSDateFormatter  dateFormatter     NSDateFormatter alloc  init    dateFormatter setDateFormat   hh-mm    NSString  resultString    dateFormatter stringFromDate  currentTime     Is it possible to use NSDateFormatter to change the  resultString  into a timestamp

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NSDate  todaysDate    NSDate new   NSDateFormatter  formatter    NSDateFormatter new    formatter setDateFormat   MM-dd-yyyy HH mm ss    NSString  strDateTime    formatter stringFromDate todaysDate    NSString  strFileName    NSString stringWithFormat    Users Shared Recording    mov  strDateTime   NSLog   filename     strFileName     Log will be   filename  Users Shared Recording 06-28-2016 12 53 26 mov

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If you d like to call this method directly on an NSDate object and get the timestamp as a string in milliseconds without any decimal places  define this method as a category    implementation NSDate  MyExtensions  -  NSString   unixTimestampInMilliseconds        return  NSString stringWithFormat     0f    self timeIntervalSince1970    1000

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Swift    I have a UILabel which shows TimeStamp over a Camera Preview       var timeStampTimer   NSTimer      var dateEnabled   Bool      var timeEnabled  Bool      IBOutlet weak var timeStampLabel  UILabel   override func viewDidLoad             super viewDidLoad     Setting Initial Values to be false          dateEnabled    false         timeEnabled    false    override func viewWillAppear animated  Bool               Current Date and Time on Preview View         timeStampLabel text   timeStamp         self timeStampTimer   NSTimer scheduledTimerWithTimeInterval 1 0 target  self  selector  Selector  updateCurrentDateAndTimeOnTimeStamperLabel   userInfo  nil repeats  true     func updateCurrentDateAndTimeOnTimeStamperLabel           Every Second  it updates time           switch  dateEnabled  timeEnabled            case  true   true                timeStampLabel text    NSDateFormatter localizedStringFromDate NSDate    dateStyle   LongStyle  timeStyle   MediumStyle              break          case  true   false                timeStampLabel text   NSDateFormatter localizedStringFromDate NSDate    dateStyle   LongStyle  timeStyle   NoStyle              break           case  false   true                timeStampLabel text   NSDateFormatter localizedStringFromDate NSDate    dateStyle   NoStyle  timeStyle   MediumStyle              break          case  false   false                timeStampLabel text    NSDateFormatter localizedStringFromDate NSDate    dateStyle   NoStyle  timeStyle   NoStyle              break          default              break                     I am setting up a setting Button to trigger a alertView    IBAction func settingsButton sender   AnyObject      let cameraSettingsAlert   UIAlertController title  NSLocalizedString  Please choose a course   comment       message  NSLocalizedString     comment       preferredStyle   ActionSheet   let timeStampOnAction   UIAlertAction title  NSLocalizedString  Time Stamp on Photo   comment       style   Default    action in      self dateEnabled   true     self timeEnabled    true    let timeStampOffAction   UIAlertAction title  NSLocalizedString  TimeStamp Off   comment       style   Default    action in      self dateEnabled   false     self timeEnabled    false    let dateOnlyAction   UIAlertAction title  NSLocalizedString  Date Only   comment       style   Default    action in      self dateEnabled   true     self timeEnabled    false     let timeOnlyAction   UIAlertAction title  NSLocalizedString  Time Only   comment       style   Default    action in      self dateEnabled   false     self timeEnabled    true    let cancel   UIAlertAction title  NSLocalizedString  Cancel   comment       style   Cancel    action in    cameraSettingsAlert addAction cancel  cameraSettingsAlert addAction timeStampOnAction  cameraSettingsAlert addAction timeStampOffAction  cameraSettingsAlert addAction dateOnlyAction  cameraSettingsAlert addAction timeOnlyAction   self presentViewController cameraSettingsAlert  animated  true  completion  nil

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-  void GetCurrentTimeStamp               NSDateFormatter  objDateformat     NSDateFormatter alloc  init            objDateformat setDateFormat   yyyy-MM-dd            NSString     strTime    objDateformat stringFromDate  NSDate date            NSString     strUTCTime    self GetUTCDateTimeFromLocalTime strTime    You can pass your date but be carefull about your date format of NSDateFormatter          NSDate  objUTCDate     objDateformat dateFromString strUTCTime           long long milliseconds    long long   objUTCDate timeIntervalSince1970    1000 0            NSString  strTimeStamp    NSString stringWithFormat    lld  milliseconds   NSLog   The Timestamp is       strTimeStamp           -  NSString    GetUTCDateTimeFromLocalTime  NSString   IN strLocalTime               NSDateFormatter  dateFormatter     NSDateFormatter alloc  init            dateFormatter setDateFormat   yyyy-MM-dd            NSDate   objDate       dateFormatter dateFromString IN strLocalTime            dateFormatter setTimeZone  NSTimeZone timeZoneWithAbbreviation   UTC             NSString  strDateTime      dateFormatter stringFromDate objDate           return strDateTime          NOTE  - The Timestamp must be in UTC Zone  So I convert our local Time to UTC Time

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The following method would return you timestamp after converting to milliseconds   RETURNS STRING   -  NSString    timeInMiliSeconds       NSDate  date    NSDate date       NSString   timeInMS    NSString stringWithFormat    lld      floor  date timeIntervalSince1970    1000   longLongValue        return timeInMS

User · Answer

Here s what I use   NSString   timestamp    NSString stringWithFormat    f    NSDate date  timeIntervalSince1970    1000      times 1000 for milliseconds  otherwise  take that out   If You re using it all the time  it might be nice to declare a macro   define TimeStamp  NSString stringWithFormat    f    NSDate date  timeIntervalSince1970    1000    Then Call it like this   NSString   timestamp   TimeStamp    Or as a method   -  NSString    timeStamp       return  NSString stringWithFormat    f    NSDate date  timeIntervalSince1970    1000       As TimeInterval  -  NSTimeInterval  timeStamp       return   NSDate date  timeIntervalSince1970    1000      NOTE   The 1000 is to convert the timestamp to milliseconds   You can remove this if you prefer your timeInterval in seconds   Swift  If you d like a global variable in Swift  you could use this   var Timestamp  String       return    NSDate   timeIntervalSince1970   1000       Then  you can call it  println  Timestamp    Timestamp      Again  the  1000 is for miliseconds  if you d prefer  you can remove that   If you want to keep it as an NSTimeInterval  var Timestamp  NSTimeInterval       return NSDate   timeIntervalSince1970   1000     Declare these outside of the context of any class and they ll be accessible anywhere

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To get timestamp from NSDate Swift 3      func getCurrentTimeStampWOMiliseconds dateToConvert  NSDate  - gt  String       let objDateformat  DateFormatter   DateFormatter       objDateformat dateFormat    yyyy-MM-dd HH mm ss      let strTime  String   objDateformat string from  dateToConvert as Date      let objUTCDate  NSDate   objDateformat date from  strTime   as NSDate     let milliseconds  Int64   Int64 objUTCDate timeIntervalSince1970      let strTimeStamp  String      milliseconds       return strTimeStamp     To use  let now   NSDate   let nowTimeStamp   self getCurrentTimeStampWOMiliseconds dateToConvert  now

User · Answer

It s convenient to define a macro for get current timestamp  class Constant       struct Time           let now     round NSDate   timeIntervalSince1970       seconds            Then you can use let timestamp   Constant Time now

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Can also use      time nil   stringValue     for timestamp in seconds

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If you need time stamp as a string    time t result   time NULL                   NSString  timeStampString      result  stringValue

User · Answer

use   NSDate date  timeIntervalSince1970

[cocoa] Get current NSDate in timestamp format

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