使用 Swift 从 [NSDictionary] 访问特定键的值

编程问答 2022-05-23

问题描述

说明：我想从下面的响应中访问 Red 值：

"data": {
        "id": "193","rootUserId": 359,"profileId": 870,"name": "flowers","unit": "Kilo-Gram","tags": [],"media": "https://onebusinessqrcode.s3.us-east-2.amazonaws.com/e16060cc-9b68-5415-a68c-3880ea16074a.jpg","createdAt": "2021-02-24T12:00:09.534Z","updatedAt": "2021-02-24T12:00:09.534Z","properties": [
            {
                "Jasmin": [
                    {
                        "id": "eb0362a1-231b-4f12-bf10-fb6fcb07f4c1","value": "Red"
                    }
                ]
            }
        ]
    }

在我的应用程序中，我必须显示响应中的“Jasmin”键，所以我输入了：

let json = try JSONSerialization.jsonObject(with: data,options: .allowFragments) as? NSDictionary
                        
  if let data = json?["data"] as? [String:Any] {
                          
  if let properties = data["properties"] as? [[String:Any]] {

  for property in properties {

   var object = CategoriesName()            
            
   if let propertyName = property.first?.key   {

   object.name = propertyName
                                        
   let value = properties.first?.values
                                        
   object.value  = value!
                                        
   self.categoryName.append(object)
                                    
     }
                                    
   }
}

我已成功获得密钥..但我无法获得（此密钥的“id”或“值”的正确值 -> Jasmin），因为当我打印 Jasmin Key 的值时，它给了我以下信息..我想获得其中任何一个:(我真正需要的是获取/打印值对象的值，例如：-> 特定键的红色-> Jasmin）

[<__nssingleobjectarrayi>( { id = "eb0362a1-231b-4f12-bf10-fb6fcb07f4c1"; value = Red; }) ]

我的结构是：

struct CategoriesName {
    var name :   String?
    var value: Dictionary<String,Any>.Values?
}

用于获取数据的变量：

// Received Category Id
 var category_id : String?
 var categoryName = [CategoriesName]()

获取数据的整个请求：

func loadCategoriesName(){
  
var urlBuilder = URLComponents(string: "https://api.yoogad.com/rest/api/v1/profile/store/category/keys")
    
    urlBuilder?.queryItems = [
        URLQueryItem(name: "categoryId",value:"\(category_id!)")
    ]
    
    guard let url = urlBuilder?.url else { return }
    
    var request = URLRequest(url: url)
    
    
    let token = UserDefaults.standard.value(forKey: "token") as? String ?? ""
    
    request.setValue(token,forHTTPHeaderField: "x-auth-token")
    
    // send request
    URLSession.shared.dataTask(with: request) { (data,response,error) in
        dispatchQueue.main.async {
            // error occured
            if error != nil {
       Helper().showAlert(title: "Server Error",message: error!.localizedDescription,in: self)
                
                return
            }
            
            do {
                // access data - safe mode
                guard let data = data else {
                    Helper().showAlert(title: "Data Error",in: self)
                    
                    return
                }
                
                // converting data to JSON
                let json = try JSONSerialization.jsonObject(with: data,options: .allowFragments) as? NSDictionary
                
                if let data = json?["data"] as? [String:Any] {
                    
                if let properties = data["properties"] as? [[String:Any]] {
                 for property in properties {
                 var object = CategoriesName()
                            
                 if let propertyName = property.first?.key   {
                  object.name = propertyName
                                
                 let value = properties.first?.values
                                
                 object.value  = value!
                                
                 self.categoryName.append(object)
                                
             }
                            
         }
     }
                     
}
} catch {
       Helper().showAlert(title: "JSON Error",message: error.localizedDescription,in: self)
                return
            }
            self.pickerView.reloadComponent(0)
        }
        
    }.resume()
}

解决方法

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