JSON

-(void)logout
{

NSURL *url = [NSURLURLWithString:@"http://192.168.1.152/apple_ios/index.php?g=mobile&m=activity&a=get_near_new_activity"];

//第二步，创建请求

NSMutableURLRequest *request = [[NSMutableURLRequestalloc]initWithURL:urlcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:10];

[request setHTTPMethod:@"POST"];//设置请求方式为POST，默认为GET

NSString *str =@"type=focus-c";//设置参数

NSData *data = [strdataUsingEncoding:NSUTF8StringEncoding];

[requestsetHTTPBody:data];

//第三步，连接服务器

NSData *received = [NSURLConnectionsendSynchronousRequest:request
returningResponse:nilerror:nil];

NSString *str1 = [[NSStringalloc]initWithData:receivedencoding:NSUTF8StringEncoding];

// NSLog(@"%@",str1);

//TouchJson
NSString *jsonStr =[[NSStringalloc]initWithString:str1
];

//NSLog(@"%@",jsonStr);

//[[NSString alloc]initWithFormat:@"{\"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\"}]}"];

NSData *jsonData = [jsonStrdataUsingEncoding:NSUTF8StringEncoding];
NSError *error;

NSMutableDictionary *root = [[CJSONDeserializerdeserializer]
deserialize:jsonDataerror:&error];

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

// NSString *jsonTextStr = @"姓名:\n";
NSLog(@"Customers:%@", customers );

//for (NSMutableDictionary *customer in customers) {

//NSString *name = [customer objectForKey:@"name"];

// name = [name stringByAppendingString:@"\n"];

// jsonTextStr = [jsonTextStr stringByAppendingString:name];

// NSLog(@"customer:%@",[customer objectForKey:@"name"]);

// }

//SBJson

// 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:str1 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:@"id"];

// NSLog(@"id:%@", customers);

//

// for (NSMutableDictionary *customer in customers) {

// NSLog(@"Customer-name:%@", [customer objectForKey:@"userid"]);

// }

// [self.jsonData setText:@"解析完成"];

// [self.parseBtn setTitle:@"Done" forState:UIControlStateNormal];
}

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。

如果你还不了解什么是Json数据，请猛击。

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：

[cpp] view
plaincopy

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：

[html] view
plaincopy

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：

[cpp] view
plaincopy

//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。

有问题请留言，大家一起交流学习！