在 Swift 语言中更好的处理 JSON 数据：SwiftyJSON

SwiftyJSON能够让在Swift语言中更加简便处理JSON数据。

With SwiftyJSON all you have to do is:

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let json = JSONValue(dataFromNetworking)
if let userName = json[0]["user"]["name"].string{
  //Now you got your value
}

And don't worry about the Optional Wrapping thing, it's done for you automatically

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let json = JSONValue(dataFromNetworking)
if let userName = json[999999]["wrong_key"]["wrong_name"].string{
  //Calm down, take it easy, the ".string" property still produces the correct Optional String type with safety
}

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let json = JSONValue(jsonObject)
switch json["user_id"]{
case .JString(let stringValue):
    let id = stringValue.toInt()
case .JNumber(let numberValue):
    let id = numberValue.integerValue
default:
    println("ooops!!! JSON Data is Unexpected or Broken")

Error Handling

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let json = JSONValue(dataFromNetworking)["some_key"]["some_wrong_key"]["wrong_name"]
if json{
  //JSONValue it self confirm to Protocol "LogicValue", with JSONValue.JInvalid produce false and others produce true
}else{
  println(json)
  //> JSON Keypath Error: Incorrect Keypath "some_wrong_key/wrong_name"
  //It always tells you where your key starts went wrong
  switch json{
  case .JInvalid(let error):
    //An NSError containing detailed error information
  }
}