详解Swift model 解析的两种方法

详解Swift model 解析的两种方法

1. 常规解析方法

  //懒加载声明一个LJNewsModel为数据的数组

  lazy var ljArray : [LJNewsModel] = [LJNewsModel]()

//MARK:-- 数据获取和解析
extension NewsViewController{
  func requestNetData(){
    /*
     打印json数据
     */
    LJDownLoadNetImage.request("GET", url: "http://c.m.163.com/nc/article/list/T1348647909107/0-20.html") { (data, respond, error) in
       方法一：解析数据 

       let str = String(data:data!, encoding: String.Encoding.utf8)!
       print(str) 

       let ljTempArray : NSArray = self.getDictionaryFromJSONString(jsonString: str).object(forKey: "T1348647909107") as! NSArray 

       for m in 0 ..< ljTempArray.count
       {
       let dict:NSDictionary = ljTempArray[m] as! NSDictionary
       let model = LJNewsModel()
       model.imageUrl = dict.object(forKey: "imgsrc") as! String
       model.contentStr = dict.object(forKey: "title") as! String
       let count :Int = (dict.object(forKey: "replyCount") != nil) ? dict.object(forKey: "replyCount") as! Int : 0
       model.replyCount = "\(count)"
       self.ljArray.add(model)
       } 

      self.ljTablewView.reloadData()
    }
  } 

  func getDictionaryFromJSONString(jsonString:String) ->NSDictionary{ 

    let jsonData:Data = jsonString.data(using: .utf8)! 

    let dict = try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)
    if dict != nil {
      return dict as! NSDictionary
    }
    return NSDictionary()
  }
}

model

import Foundation 

class LJNewsModel: NSObject { 

  //MARK:- 定义属性
  var imgsrc: String = ""  ///< store user's name, optional
  var title: String = ""   ///< store user's telephone number
  var replyCount: Int = 0 

  //方法二的model
  override init() {
    super.init()
  } 

  func setModel(_ imageUrl: String ,_ contentStr: String, _ replyCount:Int) {
    self.imageUrl = imageUrl
    self.contentStr = contentStr
    self.replyCount = replyCount
  }
}

2. 利用swift自有的函数进行解析-------推荐

//MARK:-- 数据获取和解析
extension NewsViewController{
  func requestNetData(){
    /*
     打印json数据
     */
    LJDownLoadNetImage.request("GET", url: "http://c.m.163.com/nc/article/list/T1348647909107/0-20.html") { (data, respond, error) in 

      //as? [[String :Any]] 转化为以字典为元素的数组
      //as? [String :Any]  转化为字典
      //1.方法一：解析数据 -- 推荐
      let str = String(data:data!, encoding: String.Encoding.utf8)!
      guard let allResulrDict = self.getDictionaryFromJSONString(jsonString:str) as? [String : Any] else {return}
      guard let dataArray = allResulrDict["T1348647909107"] as? [[String :Any]] else {return}
      //print(dataArray) 

      for dict in dataArray{
        self.ljArray.append(LJNewsModel(dict))
      }
      self.ljTablewView.reloadData()
    }
  } 

  func getDictionaryFromJSONString(jsonString:String) ->NSDictionary{ 

    let jsonData:Data = jsonString.data(using: .utf8)! 

    let dict = try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)
    if dict != nil {
      return dict as! NSDictionary
    }
    return NSDictionary()
  }
}

import Foundation 

class LJNewsModel: NSObject { 

  //MARK:- 定义属性
  var imgsrc: String = ""  ///< store user's name, optional
  var title: String = ""   ///< store user's telephone number
  var replyCount: Int = 0 

   //方法一的model
  //MARK:- 自定义构造函数
  init(_ dict : [String: Any]){
    super.init()
    setValuesForKeys(dict)
  } 

  override func setValue(_ value: Any?, forUndefinedKey key: String) {
  }
}

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