无法从API获取数据。

class GetData{

static let sharedInstance = GetData()

func callingGetAPI() {
    
let url = "https://jsonplaceholder.typicode.com/posts"
   
    AF.request(url, method: .get, parameters: nil, encoder: JSONParameterEncoder.default, headers: nil,interceptor: nil).response{
            responce in
        debugPrint(responce)
        switch responce.result{
        case .success(let data):
            do{
                let json = try JSONDecoder().decode([Model].self, from: data!)
                print(json)
            }catch{
                print( "Please Try again")
              //  completionHandler(.failure(.custom(message: "Please Try again")))
            }
        case .failure(let err):
            print(err.localizedDescription)
            print( "Please Try again")
        }


    }
}

}


struct Model:Codable {
let userId:Int
let id:Int
let title : String
let body: String
 }