1、从https://github.com/stig/json-framework/中下载json框架：json-framework
2、解压下载的包，将class文件夹下的所有文件导入到当前工程下。
3、在使用的文件中加入导入语句 ：#import "SBJson.h"
4、将json字符串转为NSDictionary对象。
Cpp代码
NSString *temp=@"{\"中国\":{ \"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}, \"广州\":{\"广州1\":7,\"广州2\":8,\"广州3\":9}}}"; NSDictionary *items = [temp JSONValue];
NSString *temp=@"{\"中国\":{
\"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},
\"广州\":{\"广州1\":7,\"广州2\":8,\"广州3\":9}}}";
NSDictionary *items = [temp JSONValue];
5、递归遍历解析出的NSDictionary对象
Cpp代码
-(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]]; } } }
-(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、将解析出的NSDictionary对象还原为json字符串
Cpp代码
NSString * jsonStr=[items JSONRePResentation];
NSString * jsonStr=[items JSONRepresentation];