Objective C Json not working in viewDidLoad

NSString *navTitle = self.navigationItem.title;

NSURL *address = [NSURL URLWithString:[NSString stringWithFormat:@"h开发者_开发知识库ttp://www.twostepmedia.co.uk/json.php?q=%@",navTitle]];
responseData = [[NSMutableData data] retain];   
NSURLRequest *request = [NSURLRequest requestWithURL:address];
[[NSURLConnection alloc] initWithRequest:request delegate:self];

Anyone have any idea why this wouldnt work, this is in the viewDidLoad method.

Thanks

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I assume because self.navigationItem is not initialized until viewWillAppear:.