Swift how to init Date - ios

Question

I'm trying to create model object which has Date but I can't find out how to init in terms of converting to String.
This is the date structure.
let date = NSDate()
let format = DateFormatter()
format.dateFormat = "yyyy-MM/dd HH:mm"
let strDate = format.string(from: date as Date)
Model
import UIKit
struct Post {
var Date: Date!
var Text: String
init(dictionary: [String:Any]) {
self.Date = dictionary["Date"] as? Date
self.Text = dictionary["Text"] as? String ?? ""
}
}
After I fetch data from firebase, I would like to do like below but error says
Cannot assign value of type 'Date.Type' to type 'String?'
var post: Post? {
didSet {
dateLabel.text = post?.Date
caprionLabel.text = post?.Text
}
}
Does anyone know how can I fix this?
Thank you in advance!

Answer 1

You are getting confused with Date and String, both are different Objects, You can't assign to each other.
There are two solutions to the same
If you want to show exactly the same date that is coming,
import UIKit
struct Post {
var dateString:String!
var Text: String
init(dictionary: [String:Any]) {
self.dateString = dictionary["Date"] as? String
self.Text = dictionary["Text"] as? String ?? ""
}
}
ALSO , Label can only Accept String to save
var post: Post? {
didSet {
dateLabel.text = post?.dateString
caprionLabel.text = post?.Text
}
}
Save both Date and String in your model
struct Post {
var dateString:String!
var date:Date!
var Text: String
init(dictionary: [String:Any]) {
self.dateString = dictionary["Date"] as? String
let format = DateFormatter()
format.dateFormat = "yyyy-MM/dd HH:mm"
// If dateString doesn't match your date Format Provided
self.date = format.date(from: dateString) ?? Date()
self.Text = dictionary["Text"] as? String ?? ""
}
}
ALSO , Label can only Accept String to save
var post: Post? {
didSet {
let format = DateFormatter()
// Assign to any format you want
format.dateFormat = "yyyy-MM/dd HH:mm"
dateLabel.text = format.string(from: post!.date)
caprionLabel.text = post?.Text
}
}

Answer 2

The error occurs because Date (uppercase) is a reserved struct type in Swift. The error message
Cannot assign value of type 'Date.Type' to type 'String?'
clearly states it.
Conform to the naming convention that variable names start with a lowercase letter. It avoids this kind of silly type errors.
And never ever declare variables in a struct as implicit unwrapped optional which are initialized in an init method. If they are supposed to be optional declare them as regular optional (?).
And put the code to format the date as string in the struct.
import UIKit
struct Post {
var date: Date?
var text: String
init(dictionary: [String:Any]) {
self.date = dictionary["Date"] as? Date
self.text = dictionary["Text"] as? String ?? ""
}
var formattedDate : String {
let format = DateFormatter()
format.dateFormat = "yyyy-MM/dd HH:mm"
return format.string(from: date)
}
}
var post: Post? {
didSet {
dateLabel.text = post?.formattedDate
caprionLabel.text = post?.text
}
}