Question

为什么服务器返回的数据是小括号ios

Answer 1

使用 IOS5自带解析类NSJSONSerialization方法解析：（无需导入包，IOS5支持，低版本IOS不支持）

- (void)btnPressIOS5Json:(id)sender {

NSError *error;
//加载一个NSURL对象
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://m.weather.com.cn/data/101180601.html"]];
//将请求的url数据放到NSData对象中
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
//IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中
NSDictionary *weatherDic = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
NSDictionary *weatherInfo = [weatherDic objectForKey:@"weatherinfo"];
NSString *detail = [NSString stringWithFormat:@"今天是 %@ %@ %@ 的天气状况是：%@ %@ ",[weatherInfo objectForKey:@"date_y"]
,[weatherInfo objectForKey:@"week"],[weatherInfo objectForKey:@"city"],[weatherInfo objectForKey:@"weather1"]
,[weatherInfo objectForKey:@"temp1"]];
NSLog(@"%@",detail);
NSLog(@"weatherInfo字典里面的内容为--》%@", weatherDic );
}

Answer 2

问题描述不是太清楚, 摘一段官方文档里的代码吧:

- (IBAction)grabURLInBackground:(id)sender
{
NSURL *url = [NSURL URLWithString:@"http://allseeing-i.com"];
__block ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request setCompletionBlock:^{
// 获取返回字符串
NSString *responseString = [request responseString];

// 如果返回数据为二进制, 则使用下面方法
NSData *responseData = [request responseData];
}];
[request setFailedBlock:^{
NSError *error = [request error];
}];
[request startAsynchronous];
}