标准的数据获取 －ios

#define kBgQueue dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)

#define kLatestKivaLoansURL [NSURL URLWithString:@"http://api.kivaws.org/v1/loans/search.json?status=fundraising"]

dispatch_async(kBgQueue, ^{

NSData* data = [NSDatadataWithContentsOfURL:

kLatestKivaLoansURL];

[selfperformSelectorOnMainThread:@selector(fetchedData:)

withObject:data waitUntilDone:YES]; });

- (void)fetchedData:(NSData *)responseData {

//parse out the json data

NSError* error;

NSDictionary* json = [NSJSONSerialization

JSONObjectWithData:responseData //1

options:kNilOptions error:&error];

NSArray* latestLoans = [json objectForKey:@"loans"]; //2

NSLog(@"loans: %@", latestLoans); //3

}