title: How do I make the canvas in react-native-signature-canvas change?
body: <p>I am building an application in React Native and use react-native-signature-canvas for signature.</p>
  <p>The signature itself works great, when I finish signing I receive the signature string64 and save as an image.</p>
  <p>The problem is that the signature canvas is not updated and remains empty.</p>
  <p>(Meaning: that when I seal the canvas remains white, only when I finish it is saved..)</p>
  <p>I understand that it should be basic, why can't it changed?</p>
  <p><a href="https://i.stack.imgur.com/3t2f3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3t2f3.png" alt="print screen" /></a></p>
  <p>I'm using a-
  &quot;expo&quot;: &quot;~45.0.0&quot;,
  &quot;react-native-signature-canvas&quot;: &quot;^4.4.1&quot;,
  &quot;react&quot;: &quot;17.0.2&quot;,
  &quot;react-dom&quot;: &quot;17.0.2&quot;,
  &quot;react-native&quot;: &quot;0.68.2&quot;,</p>
  <p>Regards</p>