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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