网络中数据的传输往往是以Json或XML格式进行的，如新浪微博、腾讯微博、人人网等。今天主要介绍一下ios下Json数据的解析。

首先是使用TouchJson进行解析：

TouchJson点击下载

首先导入

将Source文件加下的所以文件导入工程，在合适的位置添加CJSONDeserializer.h头文件。

代码：

    NSString *jsonStr = <p class="p1">@"{\"customer\":[{\"name\":\"roamer\",\"ycount\":\"232.4\",\"sumcount\":\"322.3\"},{\"name\":\"<span class="s1">王三</span>\",\"ycount\":\"221.2\",\"sumcount\":\"1123.2\"},{\"name\":\"<span class="s1">李四</span>\",\"ycount\":\"1221.2\",\"sumcount\":\"12123.2\"}]}"<span class="s2">;</span></p>;            NSData *jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];            NSError *error;            NSMutableDictionary *root = [[CJSONDeserializer deserializer] deserialize:jsonData error:&error];            NSLog(@"Customers:%@", root);            NSMutableArray *customers = [root objectForKey:@"customer"];            NSString *jsonTextStr = @"姓名:\n";            for (NSMutableDictionary *customer in customers) {                NSString *name = [customer objectForKey:@"name"];                name = [name stringByAppendingString:@"\n"];                jsonTextStr = [jsonTextStr stringByAppendingString:name];                NSLog(@"customer:%@",[customer objectForKey:@"name"]);            }  

输出结果：

    Customers:{            customer =     (                        {                    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";                }            );        }        2012-06-15 14:08:20.406 TouchJsonTest[1495:f803] customer:roamer        2012-06-15 14:08:20.406 TouchJsonTest[1495:f803] customer:王三        2012-06-15 14:08:20.406 TouchJsonTest[1495:f803] customer:李四  

下面使用SBJson

SBJson下载
首先导入

将Classes文件加下的所以文件导入工程，在合适的位置添加SBJson.h头文件。

代码：

    //解析数据            SBJsonParser *parser = [[SBJsonParser alloc] init];            NSString *jsonStr = <p class="p1">@"{\"customer\":[{\"name\":\"roamer\",\"ycount\":\"232.4\",\"sumcount\":\"322.3\"},{\"name\":\"<span class="s1">王三</span>\",\"ycount\":\"221.2\",\"sumcount\":\"1123.2\"},{\"name\":\"<span class="s1">李四</span>\",\"ycount\":\"1221.2\",\"sumcount\":\"12123.2\"}]}"<span class="s2">;</span></p>            NSError *error = nil;            NSMutableDictionary *root = [[NSMutableDictionary alloc] initWithDictionary:[parser objectWithString:jsonStr error:&error]];            //转换代码 不然会带来中文问题，诸如加()、：变成 = 等乱码问题            SBJsonWriter *jsonWrite = [[SBJsonWriter alloc] init];            NSString *jsonString = [jsonWrite stringWithObject:root];            NSLog(@"JsonString:%@", jsonString);            [jsonWrite release];            NSMutableArray *customers = [root objectForKey:@"customer"];            NSLog(@"Customers:%@", customers);                        for (NSMutableDictionary *customer in customers) {                NSLog(@"Customer-name:%@", [customer objectForKey:@"name"]);            }            [self.jsonData setText:@"解析完成"];            [self.parseBtn setTitle:@"Done" forState:UIControlStateNormal];  

使用TouchJson和SBJson都可以快速的完成Json数据的解析，两者使用起来都比较简单，但TouchJson性能更好一些推荐使用。
转自：http://blog.csdn.net/shang_515/article/details/7666261