I am currently trying to make an extension to render CLLocation codable. To do so, I am trying to replicate the example on this thread: Swift - Codable Decode array of arrays of CLLocation
I have the following structure:
struct FriendBase: Identifiable, Encodable {
var id: UUID = UUID()
var firstName: String
var lastKnownLocation: CLLocation? = nil
enum CodingKeys: String, CodingKey {
case id
case firstName
case lastKnownLocation
}
}
extension FriendBase: Decodable {
init(from decoder: Decoder) throws {
let value = try decoder.container(keyedBy: CodingKeys.self)
id = try value.decode(UUID.self, forKey: .id)
firstName = try value.decode(String.self, forKey: .firstName)
lastKnownLocation = try value.decode(Location.self, forKey: .lastKnownLocation)
}
}
I implemented an extension based on the thread provided above which look like this:
extension CLLocation: Encodable {
enum CodingKeys: String, CodingKey {
case latitude
case longitude
case altitude
case horizontalAccuracy
case verticalAccuracy
case speed
case course
case timestamp
}
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(coordinate.latitude, forKey: .latitude)
try container.encode(coordinate.longitude, forKey: .longitude)
try container.encode(altitude, forKey: .altitude)
try container.encode(horizontalAccuracy, forKey: .horizontalAccuracy)
try container.encode(verticalAccuracy, forKey: .verticalAccuracy)
try container.encode(speed, forKey: .speed)
try container.encode(course, forKey: .course)
try container.encode(timestamp, forKey: .timestamp)
}
}
struct Location: Codable {
let latitude: CLLocationDegrees
let longitude: CLLocationDegrees
let altitude: CLLocationDistance
let horizontalAccuracy: CLLocationAccuracy
let verticalAccuracy: CLLocationAccuracy
let speed: CLLocationSpeed
let course: CLLocationDirection
let timestamp: Date
}
extension CLLocation {
convenience init(model: Location) {
self.init(coordinate: CLLocationCoordinate2DMake(model.latitude, model.longitude), altitude: model.altitude, horizontalAccuracy: model.horizontalAccuracy, verticalAccuracy: model.verticalAccuracy, course: model.course, speed: model.speed, timestamp: model.timestamp)
}
}
I am currently getting the following error: Cannot assign value of type 'Location' to type 'CLLocation?'
on line lastKnownLocation = try value.decode(Location.self, forKey: .lastKnownLocation)
.
Thanks for your help, I am new with Swift and I believe that I should not be so far for the final solution.
Regards
On the line:
lastKnownLocation = try value.decode(Location.self, forKey: .lastKnownLocation)
the property lastKnownLocation
is declared with a type of CLLocation?
.
The code:
value.decode(Location.self, forKey: .lastKnownLocation)
will return a value of type Location
.
Hence the error since you are trying to assign a value of type Location
to a property of type CLLocation?
.
You added an extension that lets you create a CLLocation
from a Location
. Make use of that to do the needed conversion. This means that you need to change the line:
lastKnownLocation = try value.decode(Location.self, forKey: .lastKnownLocation)
to:
let location = try value.decode(Location.self, forKey: .lastKnownLocation)
lastKnownLocation = CLLocation(model: location)