funcionando

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{
    NSString *url = @"http://54.207.80.28/api-lebox/cita/prueba_rest?estudio=1.2.392.200036.9116.2.6.1.48.1221427835.1498576907.40487";
    NSURLRequest *Request = [NSURLRequest requestWithURL:[NSURL URLWithString: url]];
    NSURLResponse *resp = nil;
    NSError *error = nil;
    NSData *response = [NSURLConnection sendSynchronousRequest: Request returningResponse: &resp error: &error];
    NSString *responseString = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
    NSLog(@"%@",responseString);
    return 0;
}