About geting transaction id from paypal in iphone - iphone

Question

I have implement paypal library for payment in my iphone project.
How can I retrieve transaction id after following method called successfully.
-(void)paymentSuccessWithKey:(NSString *)payKey andStatus:(PayPalPaymentStatus)paymentStatus {
status = PAYMENTSTATUS_SUCCESS;
}
- (void)paymentLibraryExit
{
UIAlertView *alert1 = nil;
switch (status)
{
case PAYMENTSTATUS_SUCCESS:
{
.......
...........
}
...............
..............
}
}

Answer 1

The "payKey" in below method is the transactionID.
-(void)paymentSuccessWithKey:(NSString *)payKey andStatus:(PayPalPaymentStatus)paymentStatus {
status = PAYMENTSTATUS_SUCCESS;
}

Answer 2

Finally, i got transaction id using paykey by api with following api detail:-
https://www.x.com/developers/paypal/documentation-tools/api/paymentdetails-api-operation
You can get transaction id by parsing data of response of following api request code:-
- (void)paymentSuccessWithKey:(NSString *)payKey andStatus:(PayPalPaymentStatus)paymentStatus {
status = PAYMENTSTATUS_SUCCESS;
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:#"https://svcs.paypal.com/AdaptivePayments/PaymentDetails"]];
NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:url];
NSString *parameterString = [NSString stringWithFormat:#"payKey=%#&requestEnvelope.errorLanguage=%#",payKey,#"en_US"];
NSString *msgLength = [NSString stringWithFormat:#"%d", [parameterString length]];
[theRequest addValue: msgLength forHTTPHeaderField:#"Content-Length"];
//do post request for parameter passing
[theRequest setHTTPMethod:#"POST"];
[theRequest setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
//passing key as a http header request
[theRequest addValue:api_username forHTTPHeaderField:#"X-PAYPAL-SECURITY-USERID"];
//passing key as a http header request
[theRequest addValue:api_password forHTTPHeaderField:#"X-PAYPAL-SECURITY-PASSWORD"];
[theRequest addValue:api_signature forHTTPHeaderField:#"X-PAYPAL-SECURITY-SIGNATURE"];
[theRequest addValue:#"NV" forHTTPHeaderField:#"X-PAYPAL-REQUEST-DATA-FORMAT"];
[theRequest addValue:#"NV" forHTTPHeaderField:#"X-PAYPAL-RESPONSE-DATA-FORMAT"];
[theRequest addValue:app_id forHTTPHeaderField:#"X-PAYPAL-APPLICATION-ID"];
[theRequest setHTTPBody: [parameterString dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if( connection )
{
webData = [[NSMutableData data] retain];
}
else
{
NSLog(#"theConnection is NULL");
}
}