title: add some button to GMSMapView (Google Map) and change the image button
body: <p>I try but can't show the button</p>
  
  <p><strong>Code:</strong></p>
  
  <pre><code>btnLokasiSaya = UIButton(frame: CGRect(x: 341, y: 28, width: 100, height: 30))
  self.viewMap.addSubview(btnLokasiSaya)
  </code></pre>
  
  <p><strong>StoryBoard:</strong> </p>
  
  <p><a href="https://i.stack.imgur.com/PVhP6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PVhP6.png" alt="enter image description here"></a></p>
  
  <p><strong>Output:</strong> my button is not found in simulation</p>
  
  <p><a href="https://i.stack.imgur.com/uzjz3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uzjz3.png" alt="enter image description here"></a></p>