I am new to JSON. Are there any methods in J开发者_运维知识库SON parser to remove the comment characters from a response.

Eg. //{"response":"success".......

its SBJson for iPhone. from http://code.google.com/p/json-framework

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The JSON grammar doesn't allow comments. That doesn't answer your question obviously, but I suspect you'll have to do some string manipulation and replace all those comment characters with empty strings and parse it with the JSON library only after doing so.

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Nowadays, very easy to do this:

Here's how you get and parse actual json

// normal json no comments
func getStuff() {
  guard let url = URL(string: "http://you.com/x.json") else { return print("?") }
  
  let configuration = URLSessionConfiguration.ephemeral
  aSession = URLSession(configuration: configuration)
  
  aSession.dataTask(with: url) { [weak self] data, response, error in
    guard let _ = self else { return print("woe") }
    guard let data = data else { return print("woe") }
    do {
      let result = try JSONDecoder().decode(YourStructure.self, from: data)
      localBlah = Dictionary(uniqueKeysWithValues: result.whatever)
      
    } catch let error {
      print(error)
    }
  }.resume()
}

Here's how you get and parse "json" which has simple comment lines:

During development, remove #comment lines from "json":

Notice the line of code which decodes the data :

 let result = try JSONDecoder().decode(YourStructure.self, from: data)

Simply paste in these three lines of code, before, that line:

let s = String(decoding: data, as: UTF8.self)
let fixed = s.replacingOccurrences(
    of: "(?m)^#.*",
    with: "",
    options: .regularExpression)
guard let data2: Data = fixed.data(using: .utf8) else { return print("woe") }
  
let result = try JSONDecoder().decode(YourStructure.self, from: data2)

So during development in your "json" on your server, you can have things like ..

"measures": [{
    "screen": "options",
    "topMargin": 25,
    #don 't change topmargin anyone
    "leftMargin": 12,
    #Note,
    Steve prefers 13. But everyone
    else prefers 12. "rightMargin": 20,
  },

It's that simple.

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Important note on using regex:

Regex is a sophisticated process. The example regex used in this post simply means

"Delete any full lines, which, start with a '#'

So, it only understands simple "full-line" comments.

How to write regex is beyond the scope of this QA.

When you pre-munge the text at let fixed =, use whatever regex or other technique you wish.

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The JSON parsers are very finicky about what is at the start of a JSON block to parse - they DO NOT like characters other than "{" at the start (at least that's what I found with TouchJSON, and it sounds like your case with SBJson is similar).

So just take your string and eliminate any characters before the opening "{", then you can parse:

NSRange startJSONRange = [myJSONString rangeOfString:@"{"];
startJSONRange.length = myJSONString.length - startJSONRange.location;
NSString *correctJSONString = [myJSONString substringWithRange:startJSONRange];

// parse correctJSONString

That will work, but the REAL fix is to tell whoever is sending you JSON to cut out the nonsense and send real JSON.