Time and date formatter SwiftUI JSON data - swift

Question

Hopefully this an easy one. Im trying to display the date and time in a list In an iOS application using SwiftUI. I'm having issues with the code at the moment and getting this error message: Cannot convert value of type 'PostListViewModel' to expected argument type 'Data'
Please find the code below:
struct PostViewModel {
var post: Post
init(post: Post) {
self.post = post
}
var startTime: Date {
let data = PostListViewModel()
let decoder = JSONDecoder()
decoder.dateDecodingStrategy = .formatted(DateFormatter.DateFormat)
let postDate = try! decoder.decode(startTime.self, from: data)
return self.post.startTime
}
}
extension DateFormatter {
static let DateFormat: DateFormatter = {
let formatter = DateFormatter()
formatter.dateFormat = "MMM d"
formatter.calendar = Calendar(identifier: .iso8601)
formatter.timeZone = TimeZone(secondsFromGMT: 0)
formatter.locale = Locale(identifier: "en_US_POSIX")
return formatter
}()
}
Can you see any issues with the code?

Answer 1

If you want to convert a date string to a Date and then to another date string use one date formatter with two different date format strings
struct PostViewModel {
var post: Post
init(post: Post) {
self.post = post
}
var startTime: String {
let formatter = DateFormatter()
formatter.timeZone = TimeZone(secondsFromGMT: 0)
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
if let date = formatter.date(from: post.startTime) {
formatter.dateFormat = "MMM d"
return formatter.string(from: date)
} else {
return post.startTime
}
}
}