title: how to avoid resizing texture in swift
body: <p>I am adding the spritenode to the scene, the size is given.</p>
  
  <p>But when I change the texture of the spritenode, the size automatically changes to the original size of the image(png) of the texture. </p>
  
  <p>How can I avoid this?</p>
  
  <p>My code:</p>
  
  <pre><code>var bomba = SKSpriteNode(imageNamed: "bomba2") 
  var actionbomba = SKAction()
  bomba.size = CGSizeMake(frame2.size.width/18, frame2.size.width/18)   
  let bomba3 = SKTexture(imageNamed: "bomba3.png")
  actionbomba.addObject(SKAction.moveBy(CGVectorMake(0, frame.size.height/2.65), duration: beweegsnelheid))
  actionbomba.addObject(SKAction.setTexture(bomba3,resize: false))         
  
  addChild(bomba)
  bomba.runAction(SKAction.repeatAction(SKAction.sequence(actionbomba), count: -1))
  </code></pre>