Swift JSON字符串和字典以及数组的互转

1、JSONString转换为字典

func getDictionaryFromJSONString(jsonString:String) ->NSDictionary{

let jsonData:Data = jsonString.data(using: .utf8)!

let dict = try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)

if dict != nil {

return dict as! NSDictionary

}

return NSDictionary()

}

2、JSONString转换为数组

func getArrayFromJSONString(jsonString:String) ->NSArray{

let jsonData:Data = jsonString.data(using: .utf8)!

let array = try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)

if array != nil {

return array as! NSArray

}

return array as! NSArray

}

3、字典转换为JSONString

func getJSONStringFromDictionary(dictionary:NSDictionary) -> String {

if (!JSONSerialization.isValidJSONObject(dictionary)) {

print("无法解析出JSONString")

return ""

}

let data : NSData! = try? JSONSerialization.data(withJSONObject: dictionary, options: []) as NSData!

let JSONString = NSString(data:data as Data,encoding: String.Encoding.utf8.rawValue)

 return JSONString! as String

}

4、数组转换为JSONString

funcgetJSONStringFromArray(array:NSArray) ->String{

          if !JSONSerialization.isValidJSONObject(array) {

               print("无法解析出JSONString")

               return""

          }

          letdata :NSData! =try!JSONSerialization.data(withJSONObject: array, options: [])as  NSData?

          letJSONString =NSString(data: dataasData, encoding:String.Encoding.utf8.rawValue)

          returnJSONString!asString

     }