Saving Variable value outside of Connection didReceiveData Ùdelagate Method - ios

Question

I have tried to find a similar question but I was unable to do so. I have a singleton that is used to gather information through out my app. Once of the values is obtained within the following method.
-(NSString *)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data-(NSString *)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
In this method I get the response from th webservice that I am trying to connect to. Everything is good. However any attempt to save the variable value to my singleton fails. Within this method no problem. When I try to get to the next view and reference my singleton, it is as if the value never gets saved.
Here is a skeleton of my code.
NBXJSONResponse *jsonResponse = [NBXJSONResponse sharedHostedResponseSingleton];
[jsonResponse setHostedURL:_hostedURL];
Basically the goal here is to have the hosted payment page appear in the next view. The flow flow for that works. I just need to pass the URI link so that payment can be made.
I know that I can return a value from this delegate method, but since I never explicitly call this method, so I am unsure where it is being called. Probably the reason why my values are not being saved in the singleton class.
EDIT:
Right now I have one view which does all of the action.
//
// NBXViewController.h file
#import <UIKit/UIKit.h>
#interface NBXViewController : UIViewController
//*************************************************
// Variables to be declared for NBXViewController *
//*************************************************
#property (strong, nonatomic) IBOutlet UILabel *storeLabel;
#property (strong, nonatomic) IBOutlet UIButton *purchaseButton;
#property (strong, nonatomic) IBOutlet NSString *hostedURL;
//*************************************************
// Button Action methods for the buttons on View *
//*************************************************
- (IBAction)puchaseButtonAction:(id)sender;
//*************************************************
// Connection Delegate Methods *
//*************************************************
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error; // Handle Connection Error
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data; // Data Received from Connection (Header Information)
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response; //Response from Connection (Return from Hosted being called)
-(void)connectionDidFinishLoading:(NSURLConnection *)connection; // Coonection did finish loading
#end
Implementation file.
//
// NBXViewController.m
// HostedAPI
//
// Created by Philip Teoli on 3/1/2014.
// Copyright (c) 2014 Philip Teoli. All rights reserved.
//
#import "NBXViewController.h"
#import "NBXJSONResponse.h"
#interface NBXViewController ()
#end
#implementation NBXViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//****************************************
// PurchaseButton Action Method *
//****************************************
- (IBAction)puchaseButtonAction:(id)sender
{
//************************************
// Building JSON Request *
//************************************
NSString *jsonString = #"Sample Request";
//**************************************
// Convert JSON String to NSData *
//**************************************
NSData* jsonRequestData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
//**************************************
// Creating JSON object to Send *
//**************************************
NSString *jsonRequest = [[NSString alloc] initWithData:jsonRequestData encoding:NSUTF8StringEncoding];
//*****************************************
// Base64 Encoding for Application Header *
//*****************************************
NSString *base64Signature = #"NbMIIkomZ8mFNw97EGRT:NAA5e965731e8a27ab11f5f";
NSString *basic = #"Basic: ";
NSData *base64SignatureData = [base64Signature dataUsingEncoding: NSUTF8StringEncoding];
NSString *base64SignatureEncoded = [base64SignatureData base64EncodedStringWithOptions:0];
NSString *header = nil;
header = [basic stringByAppendingString:base64SignatureEncoded];
// NSLog(#"Encoded Header: %#", header);
//*************************************
// Preparing to send XML through POST *
//*************************************
NSString *postLength = [NSString stringWithFormat:#"%lu", (unsigned long)[jsonRequest length]]; //Calculating the Content Length
NSData *postData = [jsonRequest dataUsingEncoding:NSUTF8StringEncoding]; // preapring JSON Request to be sent
//**************************************
// Headers and POST Body *
//**************************************
NSURL *serviceUrl = [NSURL URLWithString:#"https://pay.test.ewbservice.com/orders"];
NSMutableURLRequest *serviceRequest=[NSMutableURLRequest requestWithURL:serviceUrl cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60];
[serviceRequest setValue:postLength forHTTPHeaderField:#"Content-Length"];
[serviceRequest setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[serviceRequest setValue:header forHTTPHeaderField:#"Authorization"];
[serviceRequest setHTTPMethod:#"POST"];
[serviceRequest setHTTPBody:postData];
NSURLConnection *connection = [[NSURLConnection alloc]
initWithRequest:serviceRequest
delegate:self startImmediately:YES];
[connection scheduleInRunLoop:[NSRunLoop mainRunLoop]
forMode:NSDefaultRunLoopMode];
[connection start];
NSLog(#"Hosted URL in Button: %#", _hostedURL);
}
//****************************************************
// Implementation of Connection Delegate Methods *
//****************************************************
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"did fail");
}
//*******************************************************
// Connection Data Received *
//*******************************************************
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSString *dataResponse = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSError *error = nil;
NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData: [dataResponse dataUsingEncoding:NSUTF8StringEncoding]
options: NSJSONReadingMutableContainers
error: &error];
//********************************
// Iterating through Dictionary *
//********************************
NSArray *jsonLink = nil;
for(id key in jsonDictionary)
{
if ([key isEqualToString:#"link"])
{
jsonLink = [jsonDictionary objectForKey:key]; // this returns a dictionary. Will need to parse dictionary another 2 times to get proper URI.
}
}
NSDictionary *test = [jsonLink objectAtIndex:0];
for(id key in test)
{
if ([key isEqualToString:#"uri"])
{
_hostedURL = [test objectForKey:key];
}
}
NBXJSONResponse *jsonResponse = [NBXJSONResponse sharedHostedResponseSingleton];
[jsonResponse setHostedURL:_hostedURL];
}
//*******************************************************
// Connection Response Method *
//*******************************************************
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(#"did receive response: \n %#", response);
NBXJSONResponse *jsonResponse = [NBXJSONResponse sharedHostedResponseSingleton];
[jsonResponse setHostedURL:_hostedURL];
}
//*******************************************************
// Connection Finished Loading Data Method *
//*******************************************************
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"did finish loading!!! \n%#", _hostedURL);
// NBXJSONResponse *jsonResponse = [NBXJSONResponse sharedHostedResponseSingleton];
// [jsonResponse setHostedURL:_hostedURL];
}
#end
Please let me know of your thoughts. I can post more details if needed. Thanks in advance for your help!!!
Regards,

Answer 1

Thanks to the great help from #rdelmar I was able to get through this. Basically in short what was happening was that I was going to the next view before the information was received by my previous view from the web service. So when I was trying to change a label with a value to my Singleton, it was not stored yet. How I got around the issue is that when I click a button I wait until the web services responses and then I add a view to go to the new view. Now my URL that I was waiting reaches me, I save it to Singleton and then I go to the next view.
I will add my code once I can grab it and post it.
Thanks again for all of your help Eric!!! Your patience and help make you a great person on this community.
Regards,
Corporate One