如何从 swift 3 facebook 图形请求中解析这个 JSON

Posted 2023-03-17

【中文标题】如何从 swift 3 facebook 图形请求中解析这个 JSON

【英文标题】：How to parse this JSON from swift 3 facebook graph request

【发布时间】：2016-09-27 05:57:13

【问题描述】：

我正在使用图形请求来获取使用此代码的 json：

nextrequest.start( (response: HTTPURLResponse?, result: Any?) in

                print(result)
)

这是下面的jsonresult，我不知道如何访问里面的数据，比如性别、id和名字……

Optional(FacebookCore.GraphRequestResult<FacebookCore.GraphRequest>.success(FacebookCore.GraphResponse(rawResponse: Optional(
gender = male;
id = 1128614937219535;
name = "Rayan Slim";
picture =     
    data =         
        height = 320;
        "is_silhouette" = 0;
        url = "https://scontent.xx.fbcdn.net/v/t1.0-1/p320x320/12541113_961418627272501_5451131278168499090_n.jpg?oh=47433bc236ce63ce1c07b92499087f29&oe=586A406A";
        width = 320;
    ;
;
))))

任何帮助将不胜感激！！！！

【参考方案1】：

在获得许可后，这里的功能就起作用了。

    if AccessToken.current != nil 
    GraphRequest(graphpath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).start( (urlResponse, requestResult) in

        switch requestResult 
        case .Success(let response):

            if let responseDictionary = response.dictionaryValue 
                let email = responseDictionary["email"] as? String
                print(email)
                let first = responseDictionary["name"] as? String
                print(first)
                if let picture = responseDictionary["picture"] as? NSDictionary 
                    if let data = picture["data"] as? NSDictionary
                        if let profilePicture = data["url"] as? String 
                            print(profilePicture)
                        
                    
                
            
        case .Failed(let error):
            print(error)

        
    )

【讨论】：

我假设此方法已被弃用，因为截至 2021 年 3 月，没有成功或失败的枚举。它失败并出现错误“Enum case 'success' not found in type 'Any?'”

【参考方案2】：

这是在 Swift 3 中使用 Facebook SDK for Swift 测试和运行的

let pictureRequest = GraphRequest(graphPath: "me/picture?type=large&redirect=false", parameters: [:])
                        pictureRequest.start
                            (urlResponse, requestResult) in

                            switch requestResult 
                            case .failed(let error):
                                print("error in graph request:", error)
                                break
                            case .success(let graphResponse):
                                if let responseDictionary = graphResponse.dictionaryValue 
                                    print(responseDictionary)

                                    var dict: NSDictionary!

                                    dict = responseDictionary["data"] as! NSDictionary
                                    print(dict)
                                    print(dict["url"])

                                
                            

                        

【讨论】：

在展开可选值时意外发现 nil

【参考方案3】：

if let userDataDict = result as? NSDictionary 
    self.first_name = userDataDict["first_name"] as? String
    self.id = userDataDict["id"] as? String
    self.last_name = userDataDict["last_name"] as? String
    let pictDict =  userDataDict["picture"] as? NSDictionary
    let pictureUrl = pictDict?["data"] as? NSDictionary
    self.pictureUrl = pictureUrl?["url"] as? String

【参考方案4】：

喜欢

 nextrequest.start( (response: HTTPURLResponse?, result: Any?) in

  print(result)

  if let userData = result as? [NSObject: Any] 

     if let name = userData["name"] as? String 
       

         print(name)
       
    if let picture = userData["picture"] as? [NSObject: Any] 
                            if let data = picture["data"] as? [NSObject: Any] 
                                if let profilePictureURL = data["url"] as? String 
                                    // Now add the data to the UI elements
                                  print (profilePictureURL)
                                
                            
                        


)

【讨论】：

这些导致它失败： Optional(FacebookCore.GraphRequestResult.success(FacebookCore.GraphResponse(rawResponse: Optional(

【参考方案5】：

使用一些 JSON 解析器，可能是 Unbox，它可以更轻松地处理 JSON。 此代码未经测试，但它是您如何做到这一点的概述。将数据存储在结构中而不是使用字典始终是代码。

typealias JSON = [String: Any]  

protocol Model 
  init?(json: JSON)


func getDataFromFacebook() 
  ...
  nextrequest.start  
    (response: HTTPURLResponse?, result: Any?) in
      self.handleFacebookResult(result)
  


func handleFacebookResult(_ result: Any?) 
  guard 
    let json = result as? JSON,
    let person = Person(json: json)
  else  return 
  //do something with person! :)


struct Person: Model 
  let name: String
  let gender: String
  let picture: Picture

  init?(json: JSON) 
    guard
      let name = json["name"] as? String,
      let gender = json["gender"] as? String,
      let pictureJson = json["picture.data"] as? JSON, // "picture.data" possible when using 'Unbox'
      let picture = Picture(json: pictureJson)
    else  return nil 
    self.name = name
    self.gender = gender
    self.picture = picture
  


struct Picture: Model 
  let height: Int // Or maybe float...?
  let width: Int // Or maybe float...?
  let url: String

    init?(json: JSON) 
    guard
      let height = json["height"] as? Int,
      let width = json["width"] as? Int,
      let url = json["url"] as? String
    else  return nil 
    self.height = height
    self.width = width
    self.url