1，访问 SBJson的项目官网，并且下载https://github.com/stig/json-framework/downloads
注意:按照作者的说明，
SBJson v3.1alpha3 - source and API docs for Mac and iOS development,now with ARC support!
只有在3.1的版本上，才支持xcode 4.2中开启ARC的功能。所以我使用这个版本。
2.依然采用源代码编译的方式。把SBJson下载后解开的 目录中的classes目录拖拉到 项目中。
3.在项目的h文件中引入#import "SBJson.h"。不再使用#import "JSON.h"
4.测试用的json字符串是： {"userInfo":{"userName":"徐泽宇","sex":"男"}}
5.测试代码是 ：
- //测试json的解析
- -(void)testJsonParser:(NSString*)jsonString
- {
- jsonString=[[NSStringalloc]initWithString:@"{\"userInfo\":{\"userName\":\"徐泽宇\",\"sex\":\"男\"}}"];
- NSLog(@"正在解析json字符串是：%@",jsonString);
- SBJsonParser*parser=[[SBJsonParseralloc]init];
- NSError*error=nil;
- NSMutableDictionary*jsonDic=[parserobjectWithString:jsonStringerror:&error];
- NSMutableDictionary*dicUserInfo=[jsonDicobjectForKey:@"userInfo"];
- NSLog(@"%@",[jsonDicobjectForKey:@"userInfo"]);
- NSLog(@"%@",[dicUserInfoobjectForKey:@"userName"]);
- "sex"]);
- }
控制台打印的内容如下:
2011-11-29 02:56:04.882 IManager[4040:fb03] {
sex = "\U7537";
userName = "\U5f90\U6cfd\U5b87";
}
2011-11-29 02:56:04.887 IManager[4040:fb03] 徐泽宇
2011-11-29 02:56:04.888 IManager[4040:fb03] 男
注意：这里的json的字符串。一定要用双引号，不能使用单引号。这点上和java的类包是有区别的。这个问题浪费了我1个小时。
处理json对象有多个记录的方法。
json字符串是：
{"customer":[{"name":"roamer","ycount":"232.4","sumcount":"322.3"},{"name":"王三","ycount":"221.2","sumcount":"1123.2"},{"name":"李四","ycount":"1221.2","sumcount":"12123.2"}]}
- +(void)test{
- DLog(@"test开始运行");
- NSString*customerGridJsonString=[[NSStringalloc]initWithString:@"{\"customer\":[{\"name\":\"roamer\",\"ycount\":\"232.4\",\"sumcount\":\"322.3\"},{\"name\":\"王三\",\"ycount\":\"221.2\",\"sumcount\":\"1123.2\"},{\"name\":\"李四\",\"ycount\":\"1221.2\",\"sumcount\":\"12123.2\"}]}"];
- DLog(@"%@",customerGridJsonString);
- NSError*error=nil;
- NSMutableDictionary*root=[[NSMutableDictionaryalloc]initWithDictionary:[parserobjectWithString:customerGridJsonStringerror:&error]];
- //注意转换代码
- SBJsonWriter*jsonWriter=[[SBJsonWriteralloc]init];
- NSString*jsonString=[jsonWriterstringWithObject:root];
- [jsonWriterrelease];
- //注意转换代码
- NSMutableArray*customers=[rootobjectForKey:@"customer"];
- DLog(@"%@",customers);
- for(NSMutableDictionary*memberincustomers)
- "name"]description]);
- }
-
控制台输出是:2012-04-22 13:55:41.845 iQuestionnaire[13464:fb03] test开始运行
2012-04-22 13:55:41.846 iQuestionnaire[13464:fb03] {"customer":[{"name":"roamer",{"name":"王三",{"name":"李四","sumcount":"12123.2"}]}
2012-04-22 13:55:41.854 iQuestionnaire[13464:fb03] {"customer":[{"sumcount":"322.3","name":"roamer","ycount":"232.4"},{"sumcount":"1123.2","name":"王三","ycount":"221.2"},{"sumcount":"12123.2","name":"李四","ycount":"1221.2"}]}
[
2012-04-22 13:55:41.854 iQuestionnaire[13464:fb03] (
{
name = roamer;
sumcount = "322.3";
ycount = "232.4";
},
name = "\U738b\U4e09";
sumcount = "1123.2";
ycount = "221.2";
name = "\U674e\U56db";
sumcount = "12123.2";
ycount = "1221.2";
}
)
2012-04-22 13:55:41.854 iQuestionnaire[13464:fb03] roamer
2012-04-22 13:55:41.856 iQuestionnaire[13464:fb03]王三
2012-04-22 13:55:41.856 iQuestionnaire[13464:fb03]李四
注意这里的转换代码： 如果直接使用
NSMutableDictionary*root 来获得 字符串，将会对json字串产生以下变化
1. 中文问题
2.加入了（）符号
3.所有的： 变成了 =
要避免这个问题的产生，需要用
SBJsonWriter*jsonWriter = [[SBJsonWriteralloc]init];
NSString*jsonString = [jsonWriterstringWithObject:root];
[jsonWriterrelease];
这段代码来把NSMutableDictionary 转成 NSString