如何在Swift中使用閉包繼承函數

Question

我已經在我的APIServices類中定義了此函數

typealias APIResponseOK = (data:NSDictionary, extra:NSDictionary) -> Void
typealias APIResponseError = (failure:Bool, code:NSString, message:NSString) -> Void

func getHttp(action:NSString, onResult:APIResponseOK, onError:APIResponseError) -> Void {

    let strUrlRequst = String(format: "\(action)")

    Alamofire.request(.GET, strUrlRequst).responseJSON { (responseData) -> Void in

        if(responseData.result.error == nil){

            if((responseData.result.value) != nil) {
                let swiftyJsonVar = JSON(responseData.result.value!)

                print("Response \(swiftyJsonVar)")

                onResult(data: swiftyJsonVar.dictionaryObject!, extra: swiftyJsonVar.dictionaryObject!);
            }
        }
        else{
            onError(failure: true, code: "OM_ERR", message: (responseData.result.error?.localizedDescription)!);
        }

    }
}

現在，我想在ViewController類中繼承此函數。 我嘗試的是波紋管。

   apiServices.getHttp("Somename", onResult: (data:NSDictionary, extra:NSDictionary){

        },
    onError:(failure: Bool, code:NSString, message:NSString){


    }) 

為什么我收到此錯誤。 請糾正我，我是新手

Answer 1

apiServices.getHttp("Somename", onResult:{ data: NSDictionary, extra: NSDictionary in
    // some
}, onError:{ failure: Bool, code: NSString, message: NSString in
    // some
}) 

您應該檢查所有Apple Swift文檔，而不要先使用它。 還有其他問題，例如，為什么要在Swift中使用NSString或NSDictionary。

Answer 2

更正您的函數聲明：

func getHttp(action:NSString, onResult:APIResponseOK, onError:APIResponseError) -> Void {

與：

func getHttp(action:NSString, onResult:APIResponseOK, onError:APIResponseError) {

之后，要調用此函數，您可以執行以下操作：

let myApiSuccess: APIResponseOK = {(data:NSDictionary?, extra:NSDictionary?) -> Void in
    print ("Api Success : result is:\n \(data)")
    // Here you can make whatever you want with your dictionaries
}

let myApiFailure: APIResponseError = {(failure:Bool?, code:NSString?, message:NSString?) -> Void in
    print ("Api Failure : error is:\n \(message)")
    // Here you can check the errors with your vars looking for failure, code and message
}

getHttp(action:NSString, onResult:APIResponseOK, onError:APIResponseError)

您可以在此答案中找到更多詳細信息