SBJson的使用

发布时间：2020-12-16 19:41:04 所属栏目：百科来源：网络整理

导读：转自：http://blog.csdn.net/binyanye1/article/details/8632770 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

转自：http://blog.csdn.net/binyanye1/article/details/8632770

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：

[cpp] 
   view plain 
   copy 
    
   
 
   
 //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 = "U5f90U6cfdU5b87";
}
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"}]}

copy

+(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 = "U738bU4e09";

sumcount = "1123.2";

ycount = "221.2";

name = "U674eU56db";

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
（编辑：李大同）

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