通过参数从JSON获取数据集

如何解决通过参数从JSON获取数据集

尝试使用我的参数从JSON查找唯一数据集。

我有JSON“ userDetails”：

{
"userDetails": [
                {
                "name": "Sabine","imageUrl" :"https://randomuser.me/api/portraits/men/82.jpg","content": [
                            {
                            "type": "video","url": "https://storage.googleapis.com/coverr-main/mp4/Travaho.mp4"
                            },{
                            "type": "image","url": "https://picsum.photos/640/1136/?image=281"
                            }
                            ]
                },{"name": "Keila Maney","imageUrl" :"https://randomuser.me/api/portraits/women/81.jpg","content": [
                            {
                            "type": "image","url": "https://picsum.photos/640/1136/?image=273"
                            },{
                            "type": "video","url": "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ForBiggerBlazes.mp4"
                            }
                            ]
                }
                ]

}

我知道我的用户是 Keila Maney （我的代码中已经包含了users属性），并且需要将该参数发送到JSON，并且仅接收 Keila Maney strong>属性（它是imageUrl，内容（类型，URL）），然后解析它们。

是否有用于搜索JSON的标准方法？

谢谢！

解决方法

只需创建UserDetails的对象，例如：var userData: [UserDetails]? 并在循环userData[x].name == "Keila Maney"中进行检查。那么这个x将成为您对Keila Maney的索引，您可以获取其所有数据。将您的json数据绑定到UserModel对象之后。这是您将从json创建的三个类

1. UserModel

   struct UserModel : Codable {
   let userDetails : [UserDetails]?
   
   enum CodingKeys: String,CodingKey {
   
        case userDetails = "userDetails"
   }
   
   init(from decoder: Decoder) throws {
      let values = try decoder.container(keyedBy: CodingKeys.self)
      userDetails = try values.decodeIfPresent([UserDetails].self,forKey:.userDetails)
   }
   
   }
   

2. UserDetails

   struct UserDetails : Codable {
   let name : String?
   let imageUrl : String?
   let content : [Content]?
   
   enum CodingKeys: String,CodingKey {
   
       case name = "name"
       case imageUrl = "imageUrl"
       case content = "content"
   }
   
   init(from decoder: Decoder) throws {
       let values = try decoder.container(keyedBy: CodingKeys.self)
       name = try values.decodeIfPresent(String.self,forKey: .name)
       imageUrl = try values.decodeIfPresent(String.self,forKey: .imageUrl)
       content = try values.decodeIfPresent([Content].self,forKey: .content)
   }
   
   }
   

3. 内容

   struct Content : Codable {
   let type : String?
   let url : String?
   
   enum CodingKeys: String,CodingKey {
   
       case type = "type"
       case url = "url"
   }
   
   init(from decoder: Decoder) throws {
       let values = try decoder.container(keyedBy: CodingKeys.self)
       type = try values.decodeIfPresent(String.self,forKey: .type)
       url = try values.decodeIfPresent(String.self,forKey: .url)
   }
   
   }
   

,

Json示例：

{  
  "places": [  
    {  
      "name": "Ulrikh","id": 555,},{  
      "name": "Place 2","id": 1,}
]  
} 

致电：

 self.getDataByID(id: 555)

快速方法：

func getDataByID(id : Int) {
        let data = self.getData()
        
        
            for i in 0..<data.count
            {
            if(Int((((data as NSDictionary)["places"] as! NSArray)[i] as! NSDictionary)["id"] as! Int) == id)
            {
                print("here is result:")
                print((((data as NSDictionary)["places"] as! NSArray)[i]))
            }
        }
    }
    
    func getData() -> NSDictionary {
        do{
            let path = Bundle.main.path(forResource: "test",ofType: "json")
            let jsonData = NSData(contentsOfFile: path!)
            let jsonResult:NSDictionary!  = try JSONSerialization.jsonObject(with: jsonData! as Data,options: JSONSerialization.ReadingOptions.mutableContainers) as! NSDictionary
            return jsonResult
        } catch let error as NSError {
            print(error)
        }
        
        return NSDictionary()
    }

不，谢谢：）