如何在Swift中继承一个带闭包的函数

Question

我在APIServices类中定义了这个函数

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)!);
        }

    }
}

现在我想在ViewController类中继承这个函数。我试过的是吼叫。

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

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


    }) 

为什么我收到此错误。请纠正我，我非常喜欢快速

Answer 1

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

您应该检查所有Apple Swift文档，而不是先使用它。 还有其他问题，比如，你为什么要在Swift中使用NSString或NSDictionary。

Answer 2

更正您的功能声明：

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

使用：

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

之后，要调用此功能，您可以执行以下操作：

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this SO answer

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