ios - Swift 3 和 Swift 4 中的 WebService API 方法？

Question

我是 Swift 的新手iOS 和我想在 Web 服务的单独类(如 NSObject )中创建一个单独的方法，以便我可以在任何 ViewController 中使用它并解析任何类型的 JSON使用 NSURLSession 响应和 Alamofire .有人可以帮助我。

Answer 1

class WebRequester: NSObject {

    static let shared = WebRequester()

    let session = URLSession.shared

    func request(urlStr:String, parameter:String, token:String? = nil, callback:@escaping (_ result:NSDictionary?, error:Error?) -> Void) {

        let url = URL(string: BaseURL + urlStr)

        debugPrint("=====================")
        debugPrint(url ?? "")
        debugPrint(parameter)
        debugPrint("=====================")

        var request = URLRequest(url: url!)
        request.httpMethod = "POST"
        request.httpBody = parameter.data(using: String.Encoding.utf8)


        print("Token :", (token ?? ""))
        request.setValue(token, forHTTPHeaderField: "Authorization")


        let task = session.dataTask(with: request) { (data, response, error) in
            DispatchQueue.main.async {
                if error == nil {
                   do {
                         let jsonObj = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.allowFragments)
                         if let dic = jsonObj as? NSDictionary {
                             callback(dic, error)
                         }
                   }
                   catch {
                      callback(nil, error)
                   }
                }
                else {
                   callback(nil, error)
                }

            }
        }
        task.resume()
    }

}

您需要将参数作为字符串传递

var params = "user_id=" + "12"
params += "&course_id=" + "1"

WebRequester.shared.request(urlStr: urlStr, parameter: params) { (result, error) in
    DispatchQueue.main.async {
         print(result)
    }
}

您也可以将参数作为字典传递，但需要使用以下 Dictionary 转换为字符串延期

request.httpBody = parameter.stringFromHttpParameters().data(using: String.Encoding.utf8)

extension Dictionary {
    func stringFromHttpParameters() -> String {
        let parameterArray = self.map { (key, value) -> String in
            let percentEscapedKey = (key as! String).addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
            let percentEscapedValue = (value as AnyObject).addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
            return "\(percentEscapedKey)=\(percentEscapedValue)"
        }

        return parameterArray.joined(separator: "&")
    }
}

网络请求者

Http请求

单张图片的多部分

多幅图像

您需要根据您的 api 响应更改响应结构

您需要根据您的 api 设置授权和 api key

WebRequester