IOS JSON解析

Question

所以我有这个JSON： {"Curs":[{"ID":"AED","Name":"Dirhamul Emiratelor Arabe","Curs":"0.8013","Multiplier":"1","Data":"2011-03-21"},{"ID":"AUD","Name":"Dolarul australian","Curs":"2.9611","Multiplier":"1","Data":"2011-03-21"},{"ID":"BGN","Name":"Leva bulgareasc","Curs":"2.1314","Multiplier":"1","Data":"2011-03-21"},{"ID":"BRL","Name":"Realul brazilian","Curs":"1.7636","Multiplier":"1","Data":"2011-03-21"},{"ID":"CAD","Name":"Dolarul canadian","Curs":"3.0137","Multiplier":"1","Data":"2011-03-21"},{"ID":"CHF","Name":"Francul elvetian","Curs":"3.2484","Multiplier":"1","Data":"2011-03-21"},{"ID":"CNY","Name":"Renminbi-ul chinezesc","Curs":"0.4483","Multiplier":"1","Data":"2011-03-21"},{"ID":"CZK","Name":"Coroana ceha","Curs":"0.1707","Multiplier":"1","Data":"2011-03-21"},{"ID":"DKK","Name":"Coroana daneza","Curs":"0.559","Multiplier":"1","Data":"2011-03-21"},{"ID":"EGP","Name":"Lira egipteana","Curs":"0.4959","Multiplier":"1","Data":"2011-03-21"},{"ID":"EUR","Name":"Euro","Curs":"4.1685","Multiplier":"1","Data":"2011-03-21"},{"ID":"GBP","Name":"Lira sterlina","Curs":"4.7864","Multiplier":"1","Data":"2011-03-21"},{"ID":"HUF","Name":"100 Forinti maghiari","Curs":"1.5354","Multiplier":"100","Data":"2011-03-21"},{"ID":"INR","Name":"Rupia indiana","Curs":"0.0653","Multiplier":"1","Data":"2011-03-21"},{"ID":"JPY","Name":"100 Yeni japonezi","Curs":"3.6213","Multiplier":"100","Data":"2011-03-21"},{"ID":"KRW","Name":"100 Woni sud-coreeni","Curs":"0.2623","Multiplier":"100","Data":"2011-03-21"},{"ID":"MDL","Name":"Leul moldovenesc","Curs":"0.2507","Multiplier":"1","Data":"2011-03-21"},{"ID":"MXN","Name":"Peso-ul mexican\t","Curs":"0.2452","Multiplier":"1","Data":"2011-03-21"},{"ID":"NOK","Name":"Coroana norvegiana","Curs":"0.5286","Multiplier":"1","Data":"2011-03-21"},{"ID":"NZD","Name":"Dolarul neo-zeelandez","Curs":"2.164","Multiplier":"1","Data":"2011-03-21"},{"ID":"PLN","Name":"Zlotul polonez","Curs":"1.0299","Multiplier":"1","Data":"2011-03-21"},{"ID":"RSD","Name":null,"Curs":"0.0404","Multiplier":"1","Data":"2011-03-21"},{"ID":"RUB","Name":"Rubla ruseasca","Curs":"0.1039","Multiplier":"1","Data":"2011-03-21"},{"ID":"SEK","Name":"Coroana suedeza","Curs":"0.4697","Multiplier":"1","Data":"2011-03-21"},{"ID":"TRY","Name":"Lira turceasca","Curs":"1.8665","Multiplier":"1","Data":"2011-03-21"},{"ID":"UAH","Name":"Hryvna ucraineana","Curs":"0.3699","Multiplier":"1","Data":"2011-03-21"},{"ID":"USD","Name":"Dolarul american","Curs":"2.9428","Multiplier":"1","Data":"2011-03-21"},{"ID":"XAU","Name":"Gramul de aur","Curs":"135.0844","Multiplier":"1","Data":"2011-03-21"},{"ID":"XDR","Name":"DST","Curs":"4.678","Multiplier":"1","Data":"2011-03-21"},{"ID":"ZAR","Name":"Randul sud-african ","Curs":"0.4233","Multiplier":"1","Data":"2011-03-21"}]}

，我想分析它，但我是新来这个，不知道怎么办。例如，我怎样才能从ID获取值。 这里是我的代码：

#import "DownloadData.h" 
#import "JSON.h" 


@implementation DownloadData 

-(void) connection 
{ 

    // Create new SBJSON parser object 
    SBJsonParser *parser = [[SBJsonParser alloc] init]; 

    // Prepare URL request to download statuses from Twitter 
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://source"]]; 

    // Perform request and get JSON back as a NSData object 
    NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; 


    // Get JSON as a NSString from NSData response 
    NSString *json_string = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding]; 
    //NSLog(json_string); 
    // parse the JSON response into an object 
    // Here we're using NSArray since we're parsing an array of JSON status objects 
    NSArray *statuses = [parser objectWithString:json_string error:nil]; 

    // Each element in statuses is a single status 
    // represented as a NSDictionary 
    //NSLog([json_string description]); 
    //NSLog([json_string objectForKey:@"Curs"]); 
    /* 
    for (NSDictionary *status in statuses) 
    { 
     // You can retrieve individual values using objectForKey on the status NSDictionary 
     // This will print the tweet and username to the console 

     NSLog(@"%@ - %@",[status objectForKey:@"Curs"]); 
    } 
    */ 
    NSLog(@"test"); 
    //jsondownload=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; 
} 
@end 

Answer 1

务必：

NSDictionary *responseObj = [parser objectWithString:json_string error:nil]; 

NSArray *statuses = [responseObj objectForKey:@"Curs"]; 

for (id anUpdate in statuses) { 


    NSLog(@"ID: %@", [(NSDictionary*)anUpdate objectForKey:@"ID"]); 

}