title: Change background image of a button (button is in super class) in Xcode
body: <p>I have inherited my custom class in my project.i.e instead of using the UIViewController i have inherited my custom class.That custom class is having the button.When I am in firstViewController i have to change the background image of that button.for that I have written</p>
  
  <pre><code> [super.button setBackgroundImage:[UIImage imageNamed:@"whiteButton.png"] forState: UIControlStateNormal];
  </code></pre>
  
  <p>But it is not changing the background image.</p>
  
  <p>Kindly help me .I have stuccoed here.If it is done then my project will be completed.</p>