JSON字符串生成与解析

"[{\"url\":\"www.baidu.com/img/bd_logo1.png\"}]”

//1.JSON字符串解析：

let  resultDic:NSDictionary! = try!  JSONSerialization.jsonObject(with: json.data(using:String.Encoding(rawValue:String.Encoding.utf8.rawValue))!, options:JSONSerialization.ReadingOptions.allowFragments)  as? NSDictionary

//2.基本数据生成JSON字符串：

//保存城市服务数据到本地：

let  cityServicesArray:NSArray! = resultDic["cityServices"]  as! NSArray

letcityData =   try!  JSONSerialization.data(withJSONObject: cityServicesArray, options:JSONSerialization.WritingOptions(rawValue:UInt(0)))

let  cityStr:String! = String.init(data: cityData, encoding: .utf8)