在 class 函数中调用 Alamofire 时出错

Question

我正在使用 Alamofire 获取 data.URLRequestConvertible 协议用于构造 request.When 通过 Alamofire 在请求的 class 函数中调用 URLRequestConvertible 枚举我收到类似这样的错误（从“(AFDataResponse) throws -> Void”类型的抛出函数（又名“(DataResponse) throws -> ()”）到非抛出函数类型“(AFDataResponse) -> Void”的无效转换（又名“(DataResponse) -> ()')”。在我正在获取结果的请求函数中，我如何使用泛型？ Q1：获取结果时出错 Q2：我如何在函数中使用泛型

URLRequestConvertible 枚举：

enum Router: URLRequestConvertible{
    case getAllDishes
    var bseUrl : URL{
        return URL(string: "https://yummie.glitch.me/")!
    }
    var method: HTTPMethod{
        switch self {
        default:
            return .get
        }
    }
    var path:String{
        switch self{
        case .getAllDishes:
            return "dish-categories"
        }
    }
    func asURLRequest() throws -> URLRequest {
        let url = bseUrl.appendingPathComponent(path)
        var request =  URLRequest(url: url)
        request.method = method
        return request
    }
}

正在调用请求的函数：

class NetworkLayer{
    class func requested(_ request:Router,completion:@escaping(Result<Data,Error>) -> Void){
        ProgressHUD.show() //if response comes that loader run
        AF.request(request).responseJSON{ (response) in
            switch response.result{
                case .success(let data):
                    do{
                        let getDishesData = data as? [String:Any]
                        let resp = try JSONSerialization.data(withJSONObject: getDishesData?["data"], options: .prettyPrinted)
                        completion(.success(response))
                    }
                case .failure(let error):
                    completion(.failure(error))
            }
    }
    }

Answer 1

您需要添加 Do-Catch 语句

catch – 如果抛出方法失败并抛出错误，执行将落入此catch块。

class NetworkLayer{
    class func requested(_ request:Router,completion:@escaping(Result<Data,Error>) -> Void){
        ProgressHUD.show() //if response comes that loader run
        AF.request(request).responseJSON{ (response) in
            switch response.result{
            case .success(let data):
                do{
                    let getDishesData = data as? [String:Any]
                    let resp = try JSONSerialization.data(withJSONObject: getDishesData?["data"], options: .prettyPrinted)
                    completion(.success(response))
                }catch{
                    print(error)
                    completion(.failure(error))
                }
            case .failure(let error):
                completion(.failure(error))
            }
        }
    }
}

这里再给你一个建议，不需要做JSONSerialization，因为responseJSON给你直接的响应（Alamofire会做JSONSerialization）。

最终代码

class NetworkLayer{
    class func requested(_ request:Router,completion:@escaping(Result<Data,Error>) -> Void){
        ProgressHUD.show() //if response comes that loader run
        AF.request(request).responseJSON{ (response) in
            switch response.result{
            case .success(let response):
                do{
                    print(response)
                    completion(.success(response))
                }catch{
                    print(error)
                    completion(.failure(error))
                }
            case .failure(let error):
                completion(.failure(error))
            }
        }
    }
}

在 class 函数中调用 Alamofire 时出错

Getting an error when calling the Alamofire in a class function

ios

swift

alamofire