how can I create objects of my class in swift based on json fetched by swiftyJson? - ios

Question

I have a class as follows:
import Foundation
import MapKit
class SingleRequest: NSObject, MKAnnotation {
var title: String?
let created: String
let discipline: String
let coordinate: CLLocationCoordinate2D
var items = NSMutableArray()
init(title: String, created: String, discipline: String, coordinate: CLLocationCoordinate2D) {
self.title = title
self.created = created
self.discipline = discipline
self.coordinate = coordinate
super.init()
}
}
I also have a json that looks like:
[{"_id":"56c9d44fbcb42e075f7d49b1",
"username":"Ms. Brynlee Quitzon DDS",
"photo":"photo.jpg",
"number":"one",
"description":"Maiores rerum beatae molestiae autem. Voluptatem magni aspernatur est voluptas.",
"__v":0,
"updated_at":"2016-02-21T15:14:23.123Z",
"created_at":"2016-02-21T15:14:23.116Z",
"location":{
"type":"Point",
"coordinates":[5.300567929507009,44.04127433959841]}
},
etc.
and now I want to fetch all json entries and create SingleRequest object for each of them.
So far I created a method in this class:
class func getAllRequests() {
print("getAllRequests")
RestApiManager.sharedInstance.getRequests { json in
let results = json//["username"]
for (index: String, subJson: JSON) in results {
let user: AnyObject = JSON.object
var title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
let latitude = (user[""]).doubleValue
let longitude = (user[""]).doubleValue
let coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
return SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate)
}
}
}
And now 2 questions:
1) as you can see above, I left those two fields empty:
let latitude = (user[""]).doubleValue
let longitude = (user[""]).doubleValue
that's because I don't know how to refer to the long/lat values from my json, since they are embeded in the coordinates field...
How can I fill it?
2) will this function create needed objects? or should I for example change the declaration to mark some return value:
class func getAllRequests()
? Thanks!

Answer 1

For your first question, you need to first get the array out of user["coordinates"] and then downcast it to Array, user["coordinates"] as? Array<Double>
For your second question, it should return an array of SingleRequest, Array<SingleRequest>
class func getAllRequests() -> Array<SingleRequest> {
var requests: Array<SingleRequest> = []
RestApiManager.sharedInstance.getRequests { json in
let results = json//["username"]
for (index: String, subJson: JSON) in results {
let user: AnyObject = JSON.object
var title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
guard let coordinates = user["coordinates"] as? Array<Double> else { print("no lat/long") }
let latitude = coordinates[0]
let longitude = coordinates[1]
let coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
requests.append(SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate))
}
}
return requests
}

Answer 2

var singleRequestsArray = [SingleRequest]()
class func getAllRequests() {
RestApiManager.sharedInstance.getRequests { json in
for (index: String, subJson: JSON) in son {
let user: AnyObject = subjson.object
let title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
var coordinate = CLLocationCoordinate2D()
if let coordinates = user["coordinates"].array{
let latitude = coordinates.first?).doubleValue
let longitude = coordinates.array.last?).doubleValue
coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
}
singleRequestsArray.append(SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate))
}
}
}
Hope this will help you!