Swift：无法将“__NSCFArray”类型的值转换为“NSDictionary” [英] Swift: Could not cast value of type '__NSCFArray' to 'NSDictionary'

问题描述

我有来自网站的JSON数据。我做了主字典，我可以解析除一个子字典之外的每个数据。我收到错误Swift：无法将类型__NSCFArray'的值转换为NSDictionary

我的数据示例。我无法解析天气，但我可以解析所有其他字典，如wind。

  [name：Mountain View，id：5375480，weather：（
 {
 description =sky is clear; 
 icon = 01n; 
 id = 800; 
 main = Clear; 
} 
），base：cmc station，wind：{
 deg =129.502; 
 speed =1.41; 
  

代码片段

让$ winder =主要词典[风]为！ [String：AnyObject 
 let speed = windDictionary [speed] as！ double 
 print（speed）
 let weather = mainDictionary [weather] as！ [String：AnyObject] 
 print（weather）
  

解决方案

p>代表你的评论...我会说windDictionary是字典...

 字典在JSON中表示与{}和
数组表示与[] //在打印的响应中，您可能有数组（）
  

所以，你的天气部分是字典数组...你必须解析它像

  let weather = mainDictionary [weather ] as！ [[String：AnyObject]] //虽然请不要使用强制解开..或者使用`if let`或`guard`语句
  

I have JSON data from website. I made the main dictionary and I can parse every data except one sub dictionary. I get the error "Swift: Could not cast value of type '__NSCFArray' to 'NSDictionary'"

This example of my data. I cannot parse "weather" but I can parse all other dictionaries like "wind".

   ["name": Mountain View, "id": 5375480, "weather": (
        {
        description = "sky is clear";
        icon = 01n;
        id = 800;
        main = Clear;
    }
), "base": cmc stations, "wind": {
    deg = "129.502";
    speed = "1.41";

Snippet of code

 let windDictionary = mainDictionary["wind"] as! [String : AnyObject
 let speed = windDictionary["speed"] as! Double
 print(speed)
 let weather = mainDictionary["weather"] as! [String : AnyObject]
 print(weather)

解决方案

on behalf your comment...I would say windDictionary is Dictionary...

Dictionary denotes in JSON with {} and 
Array denotes with [] // In printed response you may have array with ()

So, your weather part is Array of Dictionary...You have to parse it like

 let weather = mainDictionary["weather"] as! [[String : AnyObject]]  // although please not use force unwrap .. either use `if let` or `guard` statement

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