objective c - rest web services in iphone

Question

I have a problem now. I need to pass an transactionID and an user password to a rest service and it is suppose to return me a true/false value (in XML format). However, it is consistently returning me (null).. I am totally lost some one please help.

    NSString *urlString = [NSString stringWithFormat:@"https://10.124.128.93:8443/axis2/services/C3WebService/completeWithdrawal  Transaction?transactionId=%@&password=%@", _transactionID.text, _userPassword.text];

    NSURL *url = [[NSURL alloc] initWithString:urlString];
    NSString *result = [[NSString alloc] initWithContentsOfURL:url];


    NSLog(@"%@",result );

My result is constantly returning me null. How do i continue from here?

Answer 1

.h:
    NSMutableData *responseData;

.m:
    - (void)load {
        NSURL *myURL = [NSURL URLWithString:@"https://10.124.128.93:8443/axis2/services/C3WebService/completeWithdrawal  Transaction?transactionId=%@&password=%@", _transactionID.text, _userPassword.text];
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myURL
                                                 cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                             timeoutInterval:60];

    [[NSURLConnection alloc] initWithRequest:request delegate:self];
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    responseData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [responseData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    [responseData release];
    [connection release];
    [textView setString:@"Unable to fetch data"];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{
    NSLog(@"Succeeded! Received %d bytes of data",[responseData
                      `enter code here`                             length]);
    NSString *txt = [[[NSString alloc] initWithData:responseData encoding: NSASCIIStringEncoding] autorelease];

}