title: How to rotate a sprite node in sprite kit?
body: <p>I am making a game and I'm having troubles with rotating a sprite node,
  This is the code I have; What do I have to add to turn it, let's say 45 degrees?.</p>
  
  <pre><code>SKSpriteNode *platform = [SKSpriteNode spriteNodeWithImageNamed:@"YellowPlatform.png"];
  platform.position = CGPointMake(CGRectGetMidX(self.frame), -200+CGRectGetMidY(self.frame));
  platform.size = CGSizeMake(180, 10);
  platform.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:platform.size];
  platform.physicsBody.dynamic = NO;
  [self addChild:platform];
  </code></pre>