How to get specific properties from a JSON object from HTTP request using URLSession - swift

Question

With the following code I'm able to effectively get a JSON object, what I'm not sure how to do is retrieve the specific properties from the object.
Swift Code
#IBAction func testing(_ sender: Any) {
let url = URL(string: "http://example.com/cars/mustang")
let task = URLSession.shared.dataTask(with: url!) { data, response, error in
guard error == nil else {
print(error!)
return
}
guard let data = data else {
print("Data is empty")
return
}
let json = try! JSONSerialization.jsonObject(with: data, options: [])
print(json)
}
task.resume()
}
Here is what I see when I run the above code...
Output - JSON Object
(
{
color = "red";
engine = "5.0";
}
)
How can I get just the property color?
Thanks

Answer 1

Create a class which confirm the decodable protocol; CarInfo for example in your case
class CarInfo: Decodable
Create attributes of the class
var color: String
var engine: String
Create JSON key enum which inherits from CodingKey
enum CarInfoCodingKey: String, CodingKey {
case color
case engine
}
implement init
required init(from decoder: Decoder) throws
the class will be
class CarInfo: Decodable {
var color: String
var engine: String
enum CarInfoCodingKey: String, CodingKey {
case color
case engine
}
public init(from decoder: Decodabler) throws {
let container = try decoder.container(keyedBy: CarInfoCodingKey.self)
self.color = try container.decode(String.self, forKey: .color)
self.engine = try contaire.decode(String.self, forKey: .engine)
}
}
call decoder
let carinfo = try JsonDecoder().decode(CarInfo.self, from: jsonData)

Answer 2

Here is how I did it...
#IBAction func testing(_ sender: Any) {
let url = URL(string: "http://example.com/cars/mustang")
let task = URLSession.shared.dataTask(with: url!) { data, response, error in
guard error == nil else {
print(error!)
return
}
guard let data = data else {
print("Data is empty")
return
}
let json = try! JSONSerialization.jsonObject(with: data, options: [])
guard let jsonArray = json as? [[String: String]] else {
return
}
let mustangColor = jsonArray[0]["color"]
print(mustangColor!)
}
task.resume()
}