I am using firebase as a backend and storing a string of time like this 7:00 PM.
I am trying to convert the string received from Firebase and convert it into NSDate so I can sort it, change the time..etc
I've looked online and come up with this code so far
dateFormatter.dateFormat = "hh:mm a"
dateFormatter.locale = NSLocale.current
dateFormatter.timeZone = NSTimeZone.local
let date = dateFormatter.date(from: item)
self.times.append(date!)
print("Start: \(date)")
where item is the string (7:00 PM)
When I run the app, the console returns:
Item: 9:00 AM
Start: Optional(2000-01-01 05:00:00 +0000)
Ive set timezone, locale, format. Why is the time being returned not correct?
A few other examples printed out:
Item: 1:20 PM
Start: Optional(2000-01-01 17:20:00 +0000)
Item: 9:40 AM
Start: Optional(2000-01-01 05:40:00 +0000)
Item: 10:00 AM
Start: Optional(2000-01-01 05:00:00 +0000)
Item: 12:00 PM
Start: Optional(2000-01-01 17:00:00 +0000)
The class we use to convert a string to a date in Swift is DateFormatter (or NSDateFormatter if you are using Objective-C).
Convert Month Day Year String To Date In Swift import Foundation let dateString = "January 20, 2020" let dateFormatter = DateFormatter() dateFormatter. locale = Locale(identifier: "en_US_POSIX") dateFormatter. dateFormat = "MMMM d, yyyy" if let date = dateFormatter.
dateFormat = "yyyy-MM-dd'T'HH:mm:ss. SSS'Z'" dateFormatterGetNoMs. dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'" let dateFormatterPrint = DateFormatter() dateFormatterPrint. dateFormat = "MMM dd,yyyy" for dateString in isoDateArray { var date: Date?
Always remember this: Date
/ NSDate
stores times in UTC. If your timezone is anything but UTC, the value returned by print(date)
will always be different.
You can make it print out the hour as stored in Firebase by specifying a UTC timezone. The default is the user's (i.e. your) timezone:
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "hh:mm a"
dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
let item = "7:00 PM"
let date = dateFormatter.date(from: item)
print("Start: \(date)") // Start: Optional(2000-01-01 19:00:00 +0000)
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With