title: UIButton tap not responding
body: <p>I added a new UIButton</p>
  
  <pre><code>    UIButton *newButton = [UIButton buttonWithType:UIButtonTypeCustom];
      [newButton setFrame:CGRectMake(x, y, width, height)];
      [newButton setTitle:@"" forState:UIControlStateNormal];
      [newButton setTag:x+INDEX_OFFSET];
      [newButton setBackgroundImage:image forState:UIControlStateNormal];
      [newButton addTarget:self action:@selector(buttonPressed) forControlEvents:UIControlEventTouchUpInside];
  
      [self addSubview:newButton];
      [self bringSubviewToFront:newButton];
  </code></pre>
  
  <p>and I can see it on the screen but it is not responding to a tap gesture. It should call "buttonPressed". Any help would be super!</p>