Detailed explanation of AFN encapsulated network requests

This time I will bring you a detailed explanation of AFN encapsulated network requests. What are the precautions for AFN encapsulated network requests? The following is a practical case, let’s take a look.

I believe everyone knows that in a project, we usually encapsulate network requests into a singleton to ensure that the network requests Session of the entire project are the same.

Single case modeDefinition: A class has one and only one instance, and it is instantiated and provided to the entire system. I won’t say much below, let’s take a look at the detailed introduction.

Import third-party frameworks through cocoaPods

01-Switch to the project directory

cd 项目名称

02-Initialize Pods

pod init

03-Open Pods file

open Podfile

04-Edit Podfile

# 设置支持最低平台
platform :ios, '8.0'
target 'TestSwiftMixAFN' do
 # 如果是Swift项目,需添加"use_frameworks!"
 use_frameworks!
pod "AFNetworking"
end

05-Install Pods

pod install

Encapsulation AFN network request tool

1 Create a tool class, inherited from AFHTTPSessionManager

import AFNetworking
class XMSessionManager: AFHTTPSessionManager {
 // ...
}

2 Create an AFHTTPSessionManager instance through a singleton

/// 创建网络请求单例
static let shared: XMSessionManager = XMSessionManager()
----------------------------------------------------------------
/// 如果需要设置请求的属性,可在闭包中添加
/// 在第一次访问时，执行闭包，并且将结果保存在 shared 常量中
 static let shared1: XMSessionManager = {
  // 实例化对象
  let manager = XMSessionManager()
  // 设置响应反序列化支持的数据类型
  manager.responseSerializer.acceptableContentTypes?.insert("text/plain")
  // 返回对象
  return manager
 }()

3 Through enumeration, add HTTP request method(GET/POST)

/// 枚举-请求方法
///
/// - GET: GET
/// - POST: POST
enum XMHTTPMethod {
 case GET
 case POST
}

4 Customize the network request method and request the completed data through the closure callback

/// 封装网络请求方法
 ///
 /// - Parameters:
 /// - Method: GET/POST, 默认是GET请求
 /// - URLString: 请求地址
 /// - parameters: 参数
 /// - completed: 结束回调
 func request(Method:XMHTTPMethod = .GET, URLString: String,parameters: [String: AnyObject]?, completed:@escaping ((_ json: AnyObject?, _ isSuccess: Bool)->())) {
  /// 定义成功回调闭包
  let success = { (task: URLSessionDataTask,json: Any?)->() in
   completed(json as AnyObject?,true)
  }
  /// 定义失败回调闭包
  let failure = {(task: URLSessionDataTask?, error: Error)->() in
   completed(nil,false)
  }
  /// 通过请求方法,执行不同的请求
  // 如果是 GET 请求
  if Method == .GET { // GET
   get(URLString, parameters: parameters, progress: nil, success: success, failure: failure)
  } else { // POST
   post(URLString, parameters: parameters, progress: nil, success: success, failure: failure)
  }
 }

5 The use of network request tools

///GET 请求
  XMSessionManager.shared.request(URLString: "http:xxx", parameters: nil, completed:{(json: AnyObject?,isSuccess: Bool)-> () in
   // 请求成功
   if isSuccess {
    print(json ?? "")
   } else {
    print("请求失败")
   }
  })
///POST 请求
  XMSessionManager.shared.request(URLString: "www.xxx.xxx", parameters: ["key":"value" as AnyObject], completed:{(json: AnyObject?,isSuccess: Bool)-> () in
   // 请求成功
   if isSuccess {
    print(json ?? "")
   } else {
    print("请求失败")
   }
  })

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

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