[转]xcode4.2.1 中使用 sbjson 的 3.1版本来解析json字符串

http://blog.csdn.net/remote_roamer/article/details/7021640

 

 

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 = [[NSString alloc] initWithString:@"{\"userInfo\":{\"userName\":\"徐泽宇\",\"sex\":\"男\"}}"];
    NSLog(@"正在解析json字符串是：%@",jsonString);

    SBJsonParser * parser = [[SBJsonParser alloc] init];
    NSError * error = nil;
    NSMutableDictionary *jsonDic = [parser objectWithString:jsonString error:&error];
    NSMutableDictionary * dicUserInfo = [jsonDic objectForKey:@"userInfo"];

    NSLog(@"%@",[jsonDic objectForKey:@"userInfo" ]);
    NSLog(@"%@",[dicUserInfo objectForKey:@"userName"]);
    NSLog(@"%@",[dicUserInfo objectForKey:@"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"}]}

 

 

[customerGridJsonString appendString:@"{\"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\"}]}"];
    SBJsonParser * parser = [[SBJsonParser alloc] init];
    NSLog(@"%@",customerGridJsonString);
    NSError * error = nil;

    NSMutableDictionary *root = [[NSMutableDictionary alloc] initWithDictionary:[parser objectWithString:customerGridJsonString error:&error]];

    NSMutableArray * customers = [root objectForKey:@"customer"];

    for(NSMutableDictionary * member  in customers)
    {
        NSLog(@"%@",[[member objectForKey:@"name"] description]);
    }

控制台输出是:

 

2011-12-01 01:59:15.731 IManager[2922:fb03] {"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"}]}
2011-12-01 01:59:15.732 IManager[2922:fb03] roamer
2011-12-01 01:59:15.737 IManager[2922:fb03] 王三
2011-12-01 01:59:15.737 IManager[2922:fb03] 李四