title: TouchesBegan not triggering on presented SKScene
body: <p>I have an SKScene and I present another scene in it. Here is the code for presentation:</p>
  
  <pre><code>[self.view presentScene:[[LoseScene alloc] initWithSize:self.size] transition:[SKTransition crossFadeWithDuration:1.5]];
  </code></pre>
  
  <p>Here is my init code for lose scene:</p>
  
  <pre><code>-(id)initWithSize:(CGSize)size {
      if (self = [super initWithSize:size]) {
  
  // code omitted
      }
      return self;
  }
  </code></pre>
  
  <p>Problem is that this method in LoseScene is never getting called:</p>
  
  <pre><code>-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
  </code></pre>