convert json marshall time to nsdate

Question

When I marshall time.Now() to JSON object it gives result as "2009-11-10T23:00:00Z" but printing time.Now gives 2009-11-10 23:00:00 +0000 UTC. Why are they different. What are T and Z. Also how can I convert it to swift NSDate object according to this table?

have you even tried to search for it like for example "Z in timezone"? — Salvador Dali, Jul 23 '15 at 21:44
T is just used to separate Time from fate. Z is the timezone (Zulu). — Mario Zannone, Jul 23 '15 at 21:54
Anyway, in order to convert to an NSDate have a look at the NSDateFormatter documentation and [here](http://stackoverflow.com/questions/28791771/swift-iso-8601-date-formatting-with-ios7) — Mario Zannone, Jul 23 '15 at 22:04
@MarioZannone I did try. The correct format looked like `yyyy-MM-dd'T'HH:mm:ssXX` but it doesn't work. `yyyy-MM-dd'T'HH:mm:ssZZZZ` didn't work either. The orijinal string I'm working on is `2015-07-21T05:34:00.448575Z` — Thellimist, Jul 23 '15 at 22:15
Look also [here](http://stackoverflow.com/questions/30269378/swift-converting-json-date-to-swift-compatible-date) — Mario Zannone, Jul 23 '15 at 22:27
@MarioZannone Thank you this was it. You could post it as an answer :) — Thellimist, Jul 23 '15 at 22:30

evanmcdonnal · Answer 1 · 2015-07-23T22:23:45.443

0

The meaning of those values is irrelevant, they're part of that format (ISO8601). There are a couple approaches to this. One is to define a custom MarshalJSON() method for time or your struct and use it to format the date, the other is to represent it as a string in your struct in the first place so that when the default implementation executes you get the result you're looking for.

The method you'll ultimately need to use is; time.Format(format string) The golang docs show this example for using it;

package main

import (
    "fmt"
    "time"
)

func main() {
    // layout shows by example how the reference time should be represented.
    const layout = "Jan 2, 2006 at 3:04pm (MST)"
    t := time.Date(2009, time.November, 10, 15, 0, 0, 0, time.Local)
    fmt.Println(t.Format(layout))
    fmt.Println(t.UTC().Format(layout))
}

The medium date format in that link for example would use the string "Jan. 2, 2006"

edited Jul 23 '15 at 22:23

answered Jul 23 '15 at 21:56

evanmcdonnal

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But why is the marshalled time and the printed time different? – Thellimist Jul 23 '15 at 22:00
1

@Thellimist because when marshal the json, the package uses reflection to iterate the types properties and format them for json. The a `time.Date` is formatted it's using the default format string. What I was trying to explain is that you can either avoid that by using a string in the struct you marshal, or you can implement that method so that when the `time.Date` is formatted it's using one of the ones you need. – evanmcdonnal Jul 23 '15 at 22:22
I understood your answer. I was wondering why they were different also. Wish I had asked as a separate question :) While reflection why doesn't it converts as a default format string – Thellimist Jul 23 '15 at 22:26

convert json marshall time to nsdate

1 Answers1