SwiftyJSON is a valuable asset for Swift developers. It can be easily imported into projects using different methods such as CocoaPods or Carthage. I frequently utilize SwiftyJSON in my projects since handling JSON files is often necessary. To streamline the process, I created a straightforward function that retrieves the raw String value from my JSON file with just a few arguments.
First Step: Creating a Protocol and Model Class
protocol JSONable {
init?(parameter: JSON)
}
class Scheme: JSONable {
let ID :String!
let name :String!
required init(parameter: JSON) {
ID = parameter["id"].stringValue
name = parameter["name"].stringValue
}
/* Sample JSON response format
{
"status": true,
"message": "",
"data": [
{
"id": 1,
"name": "Scheme 1"
},
{
"id": 2,
"name": "Scheme 2"
},
{
"id": 3,
"name": "Scheme 3"
}
]
}
*/
}
Second Step: Converting JSON to Model Object using Extension
extension JSON {
func convertToType<T>(type: T?) -> Any? {
if let baseObj = type as? JSONable.Type {
if self.type == .array {
var arrObject: [Any] = []
for obj in self.arrayValue {
let object = baseObj.init(parameter: obj)
arrObject.append(object!)
}
return arrObject
} else {
let object = baseObj.init(parameter: self)
return object!
}
}
return nil
}
}
Third Step: Using the code with Alamofire or any other library
Alamofire.request(.GET, url).validate().responseJSON { response in
switch response.result {
case .success(let value):
let json = JSON(value)
var schemes: [Scheme] = []
if let schemeArr = json["data"].convertToType(type: Scheme.self) {
schemes = schemeArr as! [Scheme]
}
print("schemes: \(schemes)")
case .failure(let error):
print(error)
}
}
I hope you found this helpful.
For more information, you can visit the following link:
https://github.com/SwiftyJSON/SwiftyJSON/issues/714
Here's a custom function I've created specifically for integrating SwiftJSON in your Xcode Swift project:
func getJSONData(value: [String], fileName: String) -> String{
guard let path = Bundle.main.path(forResource: fileName, ofType: "json"),
let jsonData = NSData(contentsOfFile: path) else{
print("Failed to locate or read the file on disk.")
return "ERR."
}
let jsonObject = JSON(data: jsonData as Data)
guard let jsonValue = jsonObject[value].string else{
print("Failed to find the specified JSON object")
return "ERR."
}
return jsonValue
}
An example usage of this function would be
let myJsonValue = getJSONData(value: ["people","person1"], fileName: "database")database.json file looked like this:
{
"people" : {
"person1" : "Bob",
"person2" : "Steve",
"person3" : "Alan",
}
}
The function would return the value "Bob".
I hope this function proves useful to anyone using SwiftJSON integration. If you have any suggestions or constructive criticism, please feel free to share!
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