Sorting cells by distance - ios

Question

So I'm trying to sort the cells by distance calculated. I have a struct
struct Sal {
var name:String
var coordinatesLat: CLLocationDegrees
var coordinatesLong: CLLocationDegrees
//var distance?
}
in scene A
func distanceFromLocation(location: CLLocation) -> CLLocationDistance {
// Find lat and long coordinates of current location
let getLat = self.location.latitude
let getLon = self.location.longitude
let currentLocation = CLLocation(latitude: getLat, longitude: getLon)
// Calculate distance from current location to sal
let distance = currentLocation.distanceFromLocation(location)
return distance
}
scene B
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell") as! SalCustomCell
let name = sals[indexPath.row].name
cell.name.text = name
// Calculate distance between current location and sal
let salLocation = CLLocation(latitude: sals[indexPath.row].coordinatesLat, longitude: sals[indexPath.row].coordinatesLong)
// Display distance in cell.
let distanceM = viewController.distanceFromLocation(salLocation)
let distanceKm = round(distanceM/1000)
cell.distance.text = String(distanceKm) + "km"
return cell
}
I call the functions from scene A to display the distance in Km in scene B. I'm trying to sort them by distance displayed in cell but i'm not to sure on how i would sort them by. If it was name i could just do
sals.sortInPlace ({ $0.name < $1.name })
but I can't do
sals.sortInPlace ({ $0.distance < $1.distance })
because it's not apart of the struct. Do I need to make it apart of the struct? If so how?
I also tried to create an empty array and append the distance into the array to sort that way
var distance = [Double]()
self.distance.append(distanceKm) // inside cellForRowAtIndexPath
distance.sortInPlace ({ $0 < $1 })
But this didn't work out

Answer 1

Rewrite Sal so that it contains your distance calculation function, like this:
struct Sal {
var name:String
var coordinatesLat: CLLocationDegrees
var coordinatesLong: CLLocationDegrees
func distanceFromLocation(location: CLLocation) -> CLLocationDistance {
// ...
}
}
Now your array of Sal has a Sal feature that you can sort on.