title: Click on Disabled button on top of other button triggers the other button's click event
body: <p>I have a disabled button on top of enabled button:</p>
  
  <p><img src="https://i.stack.imgur.com/9XcpR.png" alt="Disabled button"></p>
  
  <p>The green button is disabled. When I click it, it triggers a click on the blue button behind. </p>
  
  <p>I tried:</p>
  
  <pre><code>self.testButton.enabled = YES;
  self.testButton.userInteractionEnabled = NO;
  </code></pre>
  
  <p>But I still got the same behavior</p>
  
  <p>Is there any way to prevent the blue button click event in this scenario?</p>
  
  <p><strong>Edit:</strong></p>
  
  <p>Fixed by not really disabling the button but changing it's target to nil:</p>
  
  <pre><code>        [myButton addTarget:nil action:nil forControlEvents:UIControlEventTouchUpInside];
          [myButton setImage:[UIImage imageNamed:@"disabledImage.png"] forState:UIControlStateNormal];
  </code></pre>