处理json数据时出错:由于数据格式不正确，因此无法读取 [英] error processing json data: The data couldn’t be read because it isn’t in the correct format

问题描述

这个错误整个上午都很烦人，我正在尝试以以下格式检索JSON:

This error has been annoying all morning, I'm trying to retrieve JSON in the format:

song = {
'artist':'Tom Waits',
'song':'New Coat Of Paint',
'lyrics':'Let\'s put a new coat of paint on this lonesome old town\nSet \'em up, we\'ll be knockin\' em [...]',
'url':'http://lyrics.wikia.com/Tom_Waits:New_Coat_Of_Paint'
}

从以下网址

: JSON URL

这是我用来解析数据的函数:

This is the function I'm using to parse the data:

  func parseJSONFromData(_ jsonData: Data?) -> [String : AnyObject]?
  {
    if let data = jsonData {
      do {
        let jsonDictionary = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.mutableContainers) as? [String : AnyObject]//Parses data into a dictionary

        return jsonDictionary

      } catch let error as NSError {
        print("error processing json data: \(error.localizedDescription)")
      }
    }

    return nil
  }
}

推荐答案

如果您访问网站 http://json.parser.online.fr ，它将使您粘贴数据并检查其是否为有效JSON.你不是.

If you go to the site http://json.parser.online.fr it will let you paste in data and check to see if it's valid JSON or not. Yours is not.

正如其他人所说，字符串需要用双引号而不是单引号引起来，并且"="无效.

As others have said, strings need to be enclosed in double quotes, not single quotes, and the "=" is not valid.

编写用"替换所有出现的'的代码非常容易. song =位不太清楚. JSON的正确格式为:

It would be quite easy to write code that would replace all occurrences of ' with ". The song = bit is less clear. The correct format for JSON would be:

{
  "song": {
    "artist":"Tom Waits",
    "song":"New Coat Of Paint",
    "lyrics":"Let\"s put a new coat of paint on this lonesome old town\nSet \"em up, we\"ll be knockin\" em [...]",
    "url":"http://lyrics.wikia.com/Tom_Waits:New_Coat_Of_Paint"
  }
}

或者您可以完全摆脱外部词典:

Or you could get rid of the outer dictionary entirely:

  {
    "artist":"Tom Waits",
    "song":"New Coat Of Paint",
    "lyrics":"Let\"s put a new coat of paint on this lonesome old town\nSet \"em up, we\"ll be knockin\" em [...]",
    "url":"http://lyrics.wikia.com/Tom_Waits:New_Coat_Of_Paint"
  }

您需要查看您的数据，并弄清楚在什么情况下它是不合法的JSON，这是怎么回事.

You need to look at your data and figure out what's wrong with it in the general case that makes it not legal JSON.

进一步挖掘之后，似乎您所使用的URL返回的是JavaScript，而不是JSON.试试这样的网址:

After further digging, it seems that the URLs you're using are returning JavaScript, not JSON. Try an URL like this instead:

这应该为您提供格式正确的JSON的Tom Waits歌曲New Coat of Paint的歌词.

That should give you the lyrics of the Tom Waits song New Coat of Paint in well-formed JSON.

此Github页面提供有关可用于查询该网站并获取歌词的搜索参数的信息:

This Github page gives info on the search parameters you can use to query that site and get lyrics:

https://github.com/Wikia/app/blob/dev/extensions/wikia/LyricsApi/LyricsApiController.class.php#L10-L15

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