1、JSONString转换为字典

// 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

/**     字典转换为JSONString          - parameter dictionary: 字典参数          - returns: 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

//数组转json    func getJSONStringFromArray(array:NSArray) -> String {                if (!JSONSerialization.isValidJSONObject(array)) {            print("无法解析出JSONString")            return ""        }                let data : NSData! = try? JSONSerialization.data(withJSONObject: array, options: []) as NSData!        let JSONString = NSString(data:data as Data,encoding: String.Encoding.utf8.rawValue)        return JSONString! as String            }