IOS customized navigation back button
===

I tried the following in my view controller. Didn't work. I am using Storyboard.

    <i>
    [super viewDidLoad];
  
    UIImage *backImage = [UIImage imageNamed:@"Back.png"] ;
    UIBarButtonItem *backButton=[[UIBarButtonItem alloc]initWithImage:backImage style:     (UIBarButtonItemStyleBordered) target:nil action:nil];
    backButton.title=@"TEST";
    [self.navigationItem setBackBarButtonItem:backButton];
</i>

Please help. Thanks.
