Question

Swift的新手并尝试为我的应用编写登录屏幕。

我的控制器：

class Api {

    func authenticate(username: String, password: String) -> Bool {   
        var params = [String: String]()
        params["username"] = username
        params["password"] = password
        params["grant_type"] = "password"

        var headers = [String: String]()
        headers["Content-Type"] = "application/x-www-form-urlencoded"

        post("authenticate", params: params, headers: headers) {data, response in
            // do something
        }
    }

    func post(location: String, params: [String: String], headers: [String: String], callback: ((data: NSString!, response: NSHTTPURLResponse) -> Void)) {
        let request = NSMutableURLRequest()
        let session = NSURLSession.sharedSession()

        request.URL = NSURL(string: Configuration.apiBaseUrl + location)
        request.HTTPMethod = "POST"
        request.HTTPBody = NSString(string: getPostBody(params)).dataUsingEncoding(NSUTF8StringEncoding)
        request.addValue("Basic " + Configuration.apiAuthorization, forHTTPHeaderField: "Authorization")

        for (key, value) in headers {
            request.addValue(value, forHTTPHeaderField: key)
        }

        let task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
            let data = NSString(data: data!, encoding: NSUTF8StringEncoding)
            let httpResponse = response as! NSHTTPURLResponse
            callback(data: data, response: httpResponse)
            return
        })
        task.resume()
    }
}

Api课程：

{{1}}

由于我计划在身份验证后添加更多API方法，因此我需要通用的POST / PUT / GET / DELETE方法。我试图理解如何在Swift中最好地设置回调，因此authenticate方法中的post调用可以返回true / false并在UI线程上显示为对话框。现在不允许在authenticate方法中的post调用中返回布尔值，因为它期望Void。

我熟悉nodejs中的回调并试图掌握这一点。任何暗示最好的方法是什么？

dataTaskWithRequest中的Swift回调

0 个答案: