'Any' 不可转换为“[[String : Any]]”

Question

如何将从 JSONSerialization 获取的 Any 类型转换为字典数组？我的代码是：

    let jsonArray: [[AnyHashable: Any]]

    do {

        jsonArray = try JSONSerialization.jsonObject(with: jsonData, options: [.ReadingOptions.allowFragments]) as! [[AnyHashable : Any]]
    }
    catch {
        let description = NSLocalizedString("Could not analyze earthquake data", comment: "Failed to unpack JSON")
        print(description)
        return
    }

但是编译器给我错误信息：

'Any' is not convertible to '[[AnyHashable : Any]]'

P.S.

我需要解析字典数组，因此 JSON 文件如下所示：

[{
  "username": "admin",
  "password": "123"
}, {
  "username": "bbvb",
  "password": "3333"
}, {
  "username": "asd",
  "password": "222"
}]

Answer 1

你为什么要使用 AnyHashable ??

试试这个：

    let jsonArray: Any? = nil

    do {



jsonArray = try JSONSerialization.jsonObject(with: jsonData, options: []) as! [Any] 

        if jsonArray != nil {
          if let resp = jsonArray as? [[AnyHashable : Any]]{

         //your result should be here inside resp, which is an array of dictionary of key-val type `AnyHashable : Any`, although you could just use String value for the key, making your format from  [[AnyHashable : Any]] to [[String : Any]]
        }

   }
   catch {
            let description = NSLocalizedString("Could not analyze earthquake data", comment: "Failed to unpack JSON")
            print(description)
            return
   }

'Any' 不可转换为“[[String : Any]]”

'Any' is not convertible to '[[String : Any]]'

swift3

nsjsonserialization