title: How to cache or preload SKLabelNode font in spritekit
body: <p>I want to load the font once and use it for the other sklabel nodes</p>
  
  <pre><code>let originalLabel: SKLabelNode = SKLabelNode(fontNamed: "fontName");
  </code></pre>
  
  <p>and later</p>
  
  <pre><code>var labelNode = originalLabel;
  var labelNodeSecond = originalLabel;
  </code></pre>
  
  <p>but that gives the following error</p>
  
  <p><strong>Attemped to add a SKNode which already has a parent: SKLabelNode</strong> </p>