如何在 Swift 中创建嵌套的 [String: Anyobject]？

Posted 2023-02-24

【中文标题】如何在 Swift 中创建嵌套的 [String: Anyobject]？

【英文标题】：how to create a nested [String: Anyobject] in Swift?

【发布时间】：2018-11-27 14:31:06

【问题描述】：

我正在通过以下方式创建嵌套的[String: AnyObject]：

let info = ["para1": test(String) as AnyObject,
            "para2": test(String) as AnyObject]

let paramater = ["para_info": info([String: AnyObject]) as AnyObject,
                    "product_id": test(String) as AnyObject,
                    "amount": test(String) as AnyObject]

使用 参数，其中 info 是嵌套的 [String: AnyObject]，但以以下方式请求它作为 POST 请求被视为带有嵌套字典的数组：

try JSONEncoding.default.encode(urlRequest, withJSONObject: parameters)

那么，我是否正确地创建了嵌套的[String: AnyObject]？

【问题讨论】：

为什么要AnyObject？在 Swift 3+ 中，所有值类型，如 String 或 Int 都是 Any。这避免了丑陋的桥梁演员。

但我将AnyObject 用于所有其他 API，它们运行良好。

【参考方案1】：

由于您明确希望它为 [String:AnyObject]：

  var dict: [String:AnyObject] = ["messageCode":"API_200" as AnyObject,
                                "data": ["activities": [["action":1,
                                                         "state":1]],
                                         "messages": [["body":"hi"]]] as AnyObject,
                                "message": "" as AnyObject]

基本上所有的根值都应该被类型转换为 AnyObject

或者很长的路：

   //Activities is as Array of dictionary with Int values
var activities = [[String:Int]]()
activities.append(["action": 1,
                   "state": 1])

//Messages is an Array of string
var messages = [[String:String]]()
messages.append(["body" : "hi"])

//Data is dictionary containing activities and messages
var data = [String:Any]()
data["activities"] = activities
data["messages"] = messages

//Finally your base dictionary
var dict = [String:AnyObject]()
dict["messageCode"] = "API_200" as AnyObject
dict["data"] = data as AnyObject
dict["message"] = "" as AnyObject
print(dict)