title: UIButton not showing highlight when touched
body: <p>I am trying to highlight my UIButton with a custom UIColor light grey and make the text go white. However, I am not sure how to do this; this is how far I have gotten with creating the UIButton.</p>
  
  <pre><code>cancelButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
      cancelButton.frame = CGRectMake(10.0, calculatorView.frame.size.height-55, 100.0, 45.0);
      [cancelButton addTarget:self action:@selector(calculateMethod:)forControlEvents:UIControlEventTouchDown];
      [[cancelButton titleLabel] setFont:[UIFont fontWithName: @"Super-text" size:20.0]];
      [cancelButton setTitle:@"Cancel" forState:UIControlStateNormal];
  </code></pre>