An extension class for nsjsonserialization (category)

. h file

nsjsonserialization+manage.h//svpulltorefreshdemo////Created by fuer on 14-7-4.//Copyright (c) 2014 Home. All rights reserved.//#import <foundation/foundation.h>/** * The domain for nserrors generated by the Nsjsonserializ Ation+uaadditions methods. */extern NSString * Const Uajsonserializationerrordomain; Ns_enum (Nsinteger, Uajsonserializationerrorcode) {uajsonserializationerrorcodeinvalidobject}; @interface  Nsjsonserialization (Manage)/** * Converts a foundation object to a JSON formatted NSString * @param jsonobject Foundation object to convert * @return NSString formatted as JSON, or nil if a error occurs * @note Writing JSON strings with this Method defaults to No nsjsonwritingoptions, and does not accept fragments. */+ (NSString *) Stringwithobject: (ID) jsonobject;/** * Converts a Foundation object to a JSON formatted NSString * @param j Sonobject Foundation object to convert * @param error a nserror pointer for storing errors, if applicable. * @return NSString Formatted as JSON, or nil if an error occurs * @note Writing JSON strings with this method defaults to no NSJSONWRITINGOP tions, and does not accept fragments. */+ (NSString *) Stringwithobject: (ID) jsonobject error: (NSERROR *) error;/** * Converts a Foundation object to a JSON forma tted NSString * @param jsonobject Foundation object to convert * @param acceptingfragments ' YES ' if objects representing J SON value fragments is acceptable, ' NO ' otherwise. * @return NSString formatted as JSON, or nil if an error occurs. * @note Writing JSON strings with this method defaults to no nsjsonwritingoptions. */+ (NSString *) Stringwithobject: (ID) jsonobject acceptingfragments: (BOOL) acceptingfragments;/** * Converts A Foundation object to a JSON formatted NSString * @param jsonobject Foundation object to convert * @param acceptingfragment S ' YES ' if objects representing JSON value fragments is acceptable, ' NO ' otherwise. * @param error an nserror pointer for storing errors, if applicable. * @return NSstring formatted as JSON, or nil if an error occurs. * @note Writing JSON strings with this method defaults to no nsjsonwritingoptions. */+ (NSString *) Stringwithobject: (ID) jsonobject acceptingfragments: (BOOL) acceptingfragments error: (NSERROR *) error  ;/** * Converts a foundation object to a JSON formatted NSString * @param jsonobject Foundation object to convert * @param Opt nsjsonwritingoptions Options * @return NSString formatted as JSON, or nil If an error occurs */+ (NSString *) Stringwi  Thobject: (ID) jsonobject options: (nsjsonwritingoptions) opt;/** * Converts a Foundation object to a JSON formatted NSString * @param jsonobject Foundation object to convert * @param opt nsjsonwritingoptions options * @param error an Nserror poin ter for storing errors, if applicable. * @return NSString formatted as JSON, or nil If an error occurs */+ (NSString *) Stringwithobject: (ID) jsonobject options: (N sjsonwritingoptions) opt error: (nserror * *) error;/** * Create a Foundation object from JSON String *@param jsonstring the JSON nsstring to convert * @return A Foundation object, or nil if an error occurs. * @note Creating objects with this method defaults to Nsjsonreadingmutablecontainers options. */+ (ID) objectwithstring: (NSString *) jsonstring;/** * Create a Foundation object from JSON String * @param jsonstring the JSON nsstring to convert * @param opt nsjsonreadingoptions * @return A Foundation object, or nil if an error occurs. */+ (ID) objectwithstring: (NSString *) jsonstring options: (nsjsonreadingoptions) opt;/** * Create a Foundation object from JSON String * @param jsonstring the JSON nsstring to convert * @param opt nsjsonreadingoptions * @param error an nserror p Ointer for storing errors, if applicable. * @return A Foundation object, or nil if an error occurs. */+ (ID) objectwithstring: (NSString *) jsonstring options: (nsjsonreadingoptions) opt error: (NSERROR *) error; @end

. m file

nsjsonserialization+manage.m//svpulltorefreshdemo////Created by fuer on 14-7-4.//Copyright (c) 2014 Home. All rights reserved.//#import "Nsjsonserialization+manage.h" @implementation nsjsonserialization (Manage) NSString * Const Uajsonserializationerrordomain = @ "com.urbanairship.json_serialization"; + (NSString *) Stringwithobject: (ID) Jsonobject {return [nsjsonserialization stringwithobject:jsonobject options:0 acceptingfragments:no error:nil];} + (NSString *) Stringwithobject: (ID) jsonobject error: (Nserror *) error {return [nsjsonserialization stringwithobject:j Sonobject options:0 acceptingfragments:no error:error];} + (NSString *) Stringwithobject: (ID) jsonobject options: (nsjsonwritingoptions) opt {return [nsjsonserialization Stringwithobject:jsonobject options:opt acceptingfragments:no Error:nil];} + (NSString *) Stringwithobject: (ID) jsonobject options: (nsjsonwritingoptions) opt error: (Nserror *) error {return [NSJS Onserialization stringwithobject:jsonobject Options:opt acceptingfragments:no error:error];} + (NSString *) Stringwithobject: (ID) jsonobject acceptingfragments: (BOOL) acceptingfragments {return [ Nsjsonserialization stringwithobject:jsonobject options:0 acceptingfragments:acceptingfragments error:nil];}    + (NSString *) Stringwithobject: (ID) jsonobject acceptingfragments: (BOOL) acceptingfragments error: (Nserror *) Error { return [nsjsonserialization stringwithobject:jsonobject options:0 acceptingfragments:acceptingfragments error:error ];} + (NSString *) Stringwithobject: (ID) jsonobject options: (nsjsonwritingoptions) opt accepting Fragments: (BOOL) acceptingfragments error: (Nserror *) error {if (!jsonobject) {return n            Il        } if (!acceptingfragments | | ([Jsonobject Iskindofclass:[nsarray class]] | | [Jsonobject Iskindofclass:[nsdictionary class]]) {if (![ Nsjsonserialization Isvalidjsonobject:jsonobject]) {if (error) {Nsstring *msg = [NSString stringwithformat:@ "attempted to serialize invalid object:%@", Jsonobject];                Nsdictionary *info = @{nslocalizeddescriptionkey:msg}; *error = [Nserror errorwithdomain:uajsonserializationerrordomain Code:uajson            Serializationerrorcodeinvalidobject Userinfo:info];        } return nil;                                                       } nsdata *data = [Nsjsonserialization datawithjsonobject:jsonobject                Options:opt Error:error];    return [[NSString alloc] Initwithdata:data encoding:nsutf8stringencoding]; } else {//this is a dirty hack but it works well and the nsjsonserialization doesn ' t allow writing of//frag ments, if we serialize the value in an array without pretty printing, and remove the//surrounding bracket CHARACTE RS, we get thE equivalent result.        NSString *arraystring = [self stringwithobject:@[jsonobject] options:0 acceptingfragments:no Error:error];    return [Arraystring substringwithrange:nsmakerange (1, arraystring.length-2)]; }}+ (ID) objectwithstring: (NSString *) jsonstring {return [Self objectwithstring:jsonstring options: Nsjsonreadingmutablecontainers];} + (ID) objectwithstring: (NSString *) jsonstring options: (nsjsonreadingoptions) opt {return [self objectwithstring: Jsonstring options:opt Error:nil];} + (ID) objectwithstring: (NSString *) jsonstring options: (nsjsonreadingoptions) opt error: (Nserror *) error {if (!jsonstr    ing) {return nil;                                           } return [nsjsonserialization jsonobjectwithdata: [jsonstring datausingencoding:nsutf8stringencoding] Options:opt Error:error];} @end