• 1.基本用法

Alamofire.request("https://httpbin.org/get").responseJSON { (response) in
    
            // original url request
            print("Request: \(String(describing: response.request))")
            // http url response
            print("Response: \(String(describing: response.response))")
            // response serialization result
            print("Result: \(response.result)")
            
            if let json = response.result.value {
                print("JSON:\(json)") // serialized json response
            }
            
            if let data = response.data, let utf8Text = String(data: data, encoding: .utf8) {
                print("Data: \(utf8Text)") // original server data as UTF8 string
            }
        }

• 2.链式响应

Alamofire.request("https://httpbin.org/get").responseString { (response) in
            print("Response String: \(String(describing: response.result.value))")
            }.responseJSON { (response) in
                print("Response JSON:\(String(describing: response.result.value)")
        }

• 添加Headers和parameter

let parameters: Parameters = [
            "foo": "bar",
            "baz": ["a", 1],
            "qux": [
                "x": 1,
                "y": 2,
                "z": 3
            ]
        ]
        let headers: HTTPHeaders = [
            "Accept" : "application/json",
            "Authorization" : "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ=="
        ]
        Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters, encoding: URLEncoding.httpBody, headers: headers)

• 自定义队列

    /**
     默认情况下，响应处理是在主线程执行，也可以自定义
     */
let utilityQueue = DispatchQueue.global(qos: .utility)   
      Alamofire.request("https://httpbin.org/get").responseJSON(queue: utilityQueue, options: []) { (response) in
            print("Executing response handler on utility queue")
        }

• Response Validation

Alamofire.request("https://httpbin.org/get")
        .validate(statusCode: 200..<300)
        .validate(contentType: ["application/json"])
            .responseData { (response) in
                switch response.result {
                case .success:
                    print("successful")
                case .failure:
                    print("error")
                }

• 下载文件

 Alamofire.download("https://httpbin.org/image/png")
            .downloadProgress { progress in
                print("Download Progress: \(progress.fractionCompleted)")
            }
            .responseData { response in
                if let data = response.result.value {
                    let image = UIImage(data: data)
                }
        }

• 上传Data数据

let imageData = UIImagePNGRepresentation(image)!
      
        Alamofire.upload(imageData, to: "https://httpbin.org/post").responseJSON { response in
            debugPrint(response)
        }

• 上传文件

        let fileURL = Bundle.main.url(forResource: "video", withExtension: "mov")!
        Alamofire.upload(fileURL, to: "https://httpbin.org/post")
            .uploadProgress { progress in // main queue by default
                print("Upload Progress: \(progress.fractionCompleted)")
            }
            .downloadProgress { progress in // main queue by default
                print("Download Progress: \(progress.fractionCompleted)")
            }
            .responseJSON { response in
                debugPrint(response)
        }