swift - 带有 Swift 3 和 alamofire 4 的 Firebase API

Question

我正在尝试使用 Alamofire 快速使用 firebase API。我在添加 header 时遇到问题，我的请求是说我的调用中有一个额外的参数。

public static func broadcastSyncDo(localId : String){
        let headers: HTTPHeaders = [
            "Authorization": "key=xxx",
            "Content-Type": "application/json"
        ]

        let parameters : [String : String] = [
            "to" : "/topics/"+localId,
            "content_available" : "1",
            "priority" : "high"
        ]


        Alamofire.request(.post, util_Constants.FIREBASE_API, headers : headers, parameters: parameters, encoding: URLEncoding.default)
            .responseJSON { response in
                print("response : \(response)")
        }
    }

Answer 1

Swift 3.0 和 Alamofire 4 似乎有一个小错误。您必须确保所有变量的类型都完全正确，否则您将收到“调用中的额外参数”错误。以下是所有正确类型的代码应该是什么样子。

//requestString variable must be of type [String]
let requestString : String =  "https://yourURLHere"

//headers variable must be of type [String: String]
let headers: [String: String] = [
            "Authorization": "key=xxx",
            "Content-Type": "application/json"
        ]

//parameters variable must be of type [String : Any]
let parameters : [String : Any] = [
            "to" : "/topics/"+localId,
            "content_available" : "1",
            "priority" : "high"
        ]
 //Alamofire 4 uses a different .request syntax that Alamofire 3, so make sure you have the correct version and format.
 Alamofire.request(requestString, method: .post, parameters: parameters, encoding:
             URLEncoding.default, headers).responseString(completionHandler:  
    { responds in
    //some response from JSON code here.
})

此链接 ( Alamofire Swift 3.0 Extra parameter in call) 也将有助于进一步解释您收到此错误的原因。