title: background blue button image obj c
body: <p>I'm assigning to a button two different types of image..</p>
  
  <p>something happens to me that I can't understand .. it creates a sort of background for the blue image</p>
  
  <pre><code>        [self.shippingButton setBackgroundImage:[UIImage customImageWithName:@"terms_and_conditions_unselected"] forState:UIControlStateNormal];
      [self.shippingButton setBackgroundImage:[UIImage customImageWithName:@"terms_and_conditions_selected"] forState:UIControlStateSelected];
  
      [self.billingButton setBackgroundImage:[UIImage customImageWithName:@"terms_and_conditions_unselected"] forState:UIControlStateNormal];
      [self.billingButton setBackgroundImage:[UIImage customImageWithName:@"terms_and_conditions_selected"] forState:UIControlStateSelected];
  
  
  - (IBAction)shippingButtonChanged:(id)sender {
      self.shippingButton.selected = !self.shippingButton.selected;
  }
  
  - (IBAction)billingButtonChanged {
      self.billingButton.selected = !self.billingButton.selected;
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/kMLYy.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p><a href="https://i.stack.imgur.com/v8BkO.png" rel="nofollow noreferrer">upload image</a></p>