title: SpriteKit: Preload sound file into memory before playing?
body: <p>Just wondering if this is possible. Currently, the first time I play a sound file while the app is running, there is a noticeable delay before the sound actually plays (like it's caching it or something). After this it plays instantly without issue, but if I close the app completely and relaunch it, the delay will be back the first time the sound is played. Here is the code I'm using to play the sound:</p>
  
  <pre><code>[self runAction:[SKAction playSoundFileNamed:@"mySound.caf" waitForCompletion:NO]];
  </code></pre>