数组或者字典解析为json字符串

///数组或者字典解析为json字符串
    func toJSONString(dict:NSDictionary!)->NSString{
        let data = try? NSJSONSerialization.dataWithJSONObject(dict, options: NSJSONWritingOptions.PrettyPrinted)
        let strJson = NSString(data: data!, encoding: NSUTF8StringEncoding)
        return strJson!
    }

代码示例：

 let dic = ["method":"SignUp.getAuthKey","version":"V1.0.0","loginNo":["18708133592","13880****62","76****7"]]
        
        let jsonDic = toJSONString(dic);
        print("jsonString=\(jsonDic)");
///结果

jsonString={
"method" : "SignUp.getAuthKey",
"loginNo" : [
"18708133592",
"13880****62",
"76****7"
],
 "version" : "V1.0.0"
}