Swift 3.0 迁移后的 Alamofire 错误：“调用中的额外参数”（请求方法）

Question

我目前正在将我的代码库更新到 Swift 3.0，并且我正在使用 Alamofire。
因此，我必须将 Alamofire 更新到 4.0（Alamofire git repo）。
我有一个请求方法来从服务器获取数据，在迁移之前，它工作得很好。
使用 Xcode 的迁移工具后，我遇到了这个错误："Extra argument in Call"。
我不太清楚为什么这个方法不再有效.
任何帮助都会很棒！

class func makeRequest(
    _ method: RequestMethod,
    authorization: String?,
    uri: String,
    params: JSONDictionary?,
    retry: Bool = true,
    completionHandler: @escaping RequestCompletionBlock)
{

    let requestURL = baseURL + uri
    let authHeader: Dictionary<String, String>? = authorization != nil ? ["Authorization" : authorization!] : nil

    //requestURL is highlighted, says "Extra argument in call"
    sharedAlamofireManager.request(Method(rawValue: method.rawValue)!, requestURL, parameters: params, encoding: .JSON, headers: authHeader).responseJSON {
        response in

    }
}

Migration Guide for Alamofire4.0

编辑：JSONDictionary：

typealias JSONDictionary = Dictionary<String, Any>

sharedAlamoFireManager 也是一个 SessionManager

Answer 1

根据 AlamoFire 文档 The RequestAdapter protocol is a completely new feature in Alamofire 4. It allows each Request made on a SessionManager to be inspected and adapted before being created. One very specific way to use an adapter is to append an Authorization header to requests behind a certain type of authentication.

header 不再是请求方法的参数，而是设置在请求适配器内部。

首先我必须创建 AccessTokenAdapter 类：

class AccessTokenAdapter: RequestAdapter {
    private let accessToken: String

    init(accessToken: String) {
        self.accessToken = accessToken
    }

    func adapt(_ urlRequest: URLRequest) throws -> URLRequest {
        var urlRequest = urlRequest

        if urlRequest.urlString.hasPrefix(RequestManager.returnBaseURL()) {
            urlRequest.setValue("Bearer " + accessToken, forHTTPHeaderField: "Authorization")
        }

        return urlRequest
    }
}

然后我需要更新我的方法：

class func makeRequest(
    _ method: RequestMethod,
    authorization: String?,
    uri: String,
    params: JSONDictionary?,
    retry: Bool = true,
    completionHandler: @escaping RequestCompletionBlock)
{

    let requestURL = baseURL + uri
    var accessToken: String?
    if let authorization = authorization {
        accessToken = authorization
    }else{
        accessToken = self.token()!
    }

    sharedAlamofireManager.adapter = AccessTokenAdapter(accessToken: accessToken!)

    sharedAlamofireManager.request(requestURL, method: .get, parameters: params, encoding: JSONEncoding.default)
        .responseJSON { response in

    }
}