1、從https://github.com/stig/json-framework/中下載json框架：json-framework

2、解壓下載的包，將class文件夾下的所有文件導(dǎo)入到當(dāng)前工程下。

3、在使用的文件中加入導(dǎo)入語(yǔ)句 ：#import "SBJson.h"

4、將json字符串轉(zhuǎn)為NSDictionary對(duì)象。

Cpp代碼  

1. NSString *temp=@"{/"中國(guó)/":{  
2.                           /"北京/":{/"北京1/":1,/"北京2/":2,/"北京3/":3},  
3.                          /"上海/":{/"上海1/":4,/"上海2/":5,/"上海3/":6},  
4.                          /"廣州/":{/"廣州1/":7,/"廣州2/":8,/"廣州3/":9}}}";  
5. NSDictionary *items = [temp JSONValue];  

 NSString *temp=@"{/"中國(guó)/":{                           /"北京/":{/"北京1/":1,/"北京2/":2,/"北京3/":3},                          /"上海/":{/"上海1/":4,/"上海2/":5,/"上海3/":6},                          /"廣州/":{/"廣州1/":7,/"廣州2/":8,/"廣州3/":9}}}"; NSDictionary *items = [temp JSONValue];

 5、遞歸遍歷解析出的NSDictionary對(duì)象

Cpp代碼  

1. -(void)visitDict:(NSDictionary *)dict{  
2.   NSArray *keys=[dict allKeys];  
3.   for (NSString *key in keys) {  
4.      NSString *result=[NSString stringWithFormat:@"key=%@,value=%@",key,[dict objectForKey:key]];  
5.      NSLog(result);  
6.      if([[dict objectForKey:key] isKindOfClass:[NSDictionary class]]){  
7.             [self visitDict:[dict objectForKey:key]];  
8.      }  
9.    }  
10. }  

-(void)visitDict:(NSDictionary *)dict{  NSArray *keys=[dict allKeys];  for (NSString *key in keys) {     NSString *result=[NSString stringWithFormat:@"key=%@,value=%@",key,[dict objectForKey:key]];     NSLog(result);     if([[dict objectForKey:key] isKindOfClass:[NSDictionary class]]){            [self visitDict:[dict objectForKey:key]];     }   }}

 6、將解析出的NSDictionary對(duì)象還原為json字符串

Cpp代碼  

1. NSString * jsonStr=[items JSONRePResentation];  

NSString * jsonStr=[items JSONRepresentation];