1. 用到三方，安裝方法不再贅述。

   • SwiftyJSON
   • Alamofire

2. 創(chuàng)建HTTPManager.swift管理類

• 引入頭文件

import Alamofire
import SwiftyJSON

• 創(chuàng)建API結(jié)構(gòu)體

struct API {
  //任何地方調(diào)用 API.hostName + '具體地址'，
    static let hostName = "https://normal"
   //這里可以寫其他的，用于測試
    static let hostNameTest = "http://test"

}

• 創(chuàng)建管理類單例

  class func sharedInstance() -> HTTPManager {
        struct Static {
            static let instance = HTTPManager()
        }
        return Static.instance
    }

• 數(shù)據(jù)請求方法封裝

//MARK:數(shù)據(jù)請求方法
    
    ///數(shù)據(jù)請求方法
    ///- Parameters:
    ///     - url    : 接口地址
    ///     - type   : 請求類型 GET,POST等
    ///     - params : 參數(shù) [String : AnyObject]
    ///     - success: 成功的回調(diào)
    ///     - failure: 失敗的回調(diào)
    func exchangeData(url:String,type:HTTPMethod,params:[String : AnyObject]?, success:@escaping ((_ json: JSON)->()),failure:@escaping ((_ json: String)->()) ){
        let headers: HTTPHeaders = [
          //這里配置headers
        ]
        Alamofire.request(url, method: type, parameters: params, encoding: URLEncoding.methodDependent,headers: headers).responseJSON { (response) in
            if(((response.response?.statusCode)! > 199) && ((response.response?.statusCode)! < 300)){
                //一般這里就是成功的
                if (response.result.value != nil) {
                  //獲取數(shù)據(jù)部位空就把數(shù)據(jù)返回
                    let a = JSON(response.result.value!);
                    success(a);
                }else{
                  //不然返回空
                    success([])
                }
            }else  if(response.response?.statusCode == 400){
                //出現(xiàn)報錯信息
                //這些錯誤代碼按需取用
                failure("\(String(describing: response.response?.statusCode))");
            }else if(response.response?.statusCode == 401){
                failure("用戶驗證信息有誤");
            }else if(response.response?.statusCode == 404){
                failure("接口被外星人抓走了")
            }else if(response.response?.statusCode == 406){
                failure("接口版本不符合");
            }else if(response.response?.statusCode == 429){
                failure("請求頻率太高");
            }else if(response.response?.statusCode == 500){
                failure("服務(wù)器正在維護");
            }else{
                failure("服務(wù)器正在維護");

            }
        }
        
    }

• 使用方法

   let url = API.hostName + "/api/hospitals";
   HTTPManager.sharedInstance().exchangeData(url: url, type: .get, params: nil, success: { (json) in
            print(json);
   }) { (reason) in
            print(reason);
    }

• HTTPManager.swift的完整代碼如下

import Foundation
import Alamofire
import SwiftyJSON


struct API {
    //此處根據(jù)本地鍵值 debug ,用來作為baseURL,一個可以用來做測試的接口,一個定義為線上接口.可以設(shè)置一個按鈕，管理debug字段，重啟app就可以更換接口
    static let hostName = "https://dev.api.healthydoc.com.cn/"
   
}
class HTTPManager: NSObject {
    class func sharedInstance() -> HTTPManager {
        struct Static {
            static let instance = HTTPManager()
        }
        return Static.instance
    }
    
    //MARK:數(shù)據(jù)請求方法
    
    ///數(shù)據(jù)請求方法
    ///- Parameters:
    ///     - url    : 接口地址
    ///     - type   : 請求類型 GET,POST等
    ///     - params : 參數(shù) [String : AnyObject]
    ///     - success: 成功的回調(diào)
    ///     - failure: 失敗的回調(diào)


   
    func exchangeData(url:String,type:HTTPMethod,params:[String : AnyObject]?, success:@escaping ((_ json: JSON)->()),failure:@escaping ((_ json: String)->()) ){

        let accept = "application/json;" + version
        let headers: HTTPHeaders = [
           //......
        ]
        Alamofire.request(url, method: type, parameters: params, encoding: URLEncoding.methodDependent,headers: headers).responseJSON { (response) in
            if(((response.response?.statusCode)! > 199) && ((response.response?.statusCode)! < 300)){
                if (response.result.value != nil) {
                    let a = JSON(response.result.value!);
                    success(a);
                    
                }else{
                    success([])
                }
            }else  if(response.response?.statusCode == 400){
                failure("\(String(describing: response.response?.statusCode))");
            }else if(response.response?.statusCode == 401){
                failure("用戶驗證信息有誤");
            }else if(response.response?.statusCode == 404){
                failure("接口被外星人抓走了")
            }else if(response.response?.statusCode == 406){
                failure("接口版本不符合");
            }else if(response.response?.statusCode == 429){
                failure("請求頻率太高");
            }else if(response.response?.statusCode == 500){
                failure("服務(wù)器正在維護");
            }else{
                failure("服務(wù)器正在維護");

            }
        }
        
    }
  
}