Date Formatter in swift - ios

Question

i want to get this type of formate -> April 20, 2018 at 9:02:00 PM UTC+5:30
for firestore timestamp. i already try this code but do not get proper formate as above.
let date = Date()
let formatter = DateFormatter()
formatter.dateFormat = "MMMM d yyyy hh:mm:ss a Z"
formatter.timeZone = NSTimeZone(name: "IST") as TimeZone?
let result = formatter.string(from: date)
print(result)
already use this formatter formatter.dateFormat = "MMMM d yyyy'T'hh:mm:ss a Z"
Thanks

Answer 1

You can use like this:
let date = Date()
let formatter = DateFormatter()
formatter.dateFormat = "MMMM dd, yyyy 'at' hh:mm:ss a 'UTC'Z" //If you dont want static "UTC" you can go for ZZZZ instead of 'UTC'Z.
formatter.timeZone = TimeZone(abbreviation: "IST")
let result1 = formatter.string(from: date)
print(result1)
Note: If you do not want the UTC to be static in the string, you can also use the format "MMMM dd, yyyy 'at' hh:mm:ss a ZZZZ"
Thank you Larme For the format improvement
Output:

Answer 2

do like
let formatter = DateFormatter()
//If you want it in your specific format you can simply add 'UTC'
formatter.dateFormat = "MMMM dd, yyyy 'at' hh:mm:ss a 'UTC'Z"
formatter.timeZone = NSTimeZone(name: "IST") as TimeZone?
let result = formatter.string(from: Date())
print(result)
Note: if you want to set the currentTimezone for your string then use the format "MMMM dd, yyyy 'at' hh:mm:ss a ZZZZ"
you get the output as

Answer 3

Try this if you don't want leading zero in hour, when hour has single digit. Also you don't need to typecast NSTimeZone into TimeZone. You can directly use TimeZone.
let date = Date()
let formatter = DateFormatter()
formatter.dateFormat = "MMMM dd, yyyy 'at' h:mm:ss a 'UTC'Z"
formatter.timeZone = TimeZone(abbreviation: "IST")
let result = formatter.string(from: date)
print(result)
April 23, 2018 at 3:09:01 PM UTC+0530