.h文件
//
// NSJSONSerialization+Manage.h
// SVPullToRefreshDemo
//
// Created by Fuer on 14-7-4.
// Copyright (c) 2014年 Home. All rights reserved.
//#import <Foundation/Foundation.h>
/*** The domain for NSErrors generated by the NSJSONSerialization+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 an 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 jsonObject Foundation object to convert* @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, and does not accept fragments.*/
+ (NSString *)stringWithObject:(id)jsonObject error:(NSError **)error;/*** Converts a Foundation object to a JSON formatted NSString* @param jsonObject Foundation object to convert* @param acceptingFragments `YES` if objects representing JSON value fragments are 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 acceptingFragments `YES` if objects representing JSON value fragments are 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 *)stringWithObject:(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 pointer for storing errors, if applicable.* @return NSString formatted as JSON, or nil if an error occurs*/
+ (NSString *)stringWithObject:(id)jsonObject options:(NSJSONWritingOptions)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 pointer 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文件
//
// NSJSONSerialization+Manage.m
// SVPullToRefreshDemo
//
// Created by Fuer on 14-7-4.
// Copyright (c) 2014年 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:jsonObject 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 [NSJSONSerialization 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)jsonObjectoptions:(NSJSONWritingOptions)optacceptingFragments:(BOOL)acceptingFragmentserror:(NSError **)error {if (!jsonObject) {return nil;}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:UAJSONSerializationErrorDomaincode:UAJSONSerializationErrorCodeInvalidObjectuserInfo:info];}return nil;}NSData *data = [NSJSONSerialization dataWithJSONObject:jsonObjectoptions:opterror:error];return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];} else {//this is a dirty hack but it works well. while NSJSONSerialization doesn't allow writing of//fragments, if we serialize the value in an array without pretty printing, and remove the//surrounding bracket characters, 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 (!jsonString) {return nil;}return [NSJSONSerialization JSONObjectWithData: [jsonString dataUsingEncoding:NSUTF8StringEncoding]options: opterror: error];
}
@end
option参数说明.
enum {
NSJSONReadingMutableContainers = (1UL << 0), //返回的容器是可变类型的（Array和Dictionary）
NSJSONReadingMutableLeaves = (1UL << 1), //返回的叶子NSString是可变类型的；
NSJSONReadingAllowFragments = (1UL << 2) //允许顶层的界面不是NSArray或NSDictionary；
};
typedef NSUInteger NSJSONReadingOptions;