title: Make a simple fade in animation in Swift?
body: <p>I am trying to make a simple animation in Swift. It is a fade in.</p>
  
  <p><strong>I attempted:</strong></p>
  
  <pre><code>self.myFirstLabel.alpha = 0
  self.myFirstButton.alpha = 0
  self.mySecondButton.alpha = 0
  </code></pre>
  
  <p>Then, I have:</p>
  
  <pre><code>self.view.addSubview(myFirstLabel)
  self.view.addSubview(myFirstButton)
  self.view.addSubview(mySecondButton)
  </code></pre>
  
  <p>And then:</p>
  
  <pre><code>UIView.animateWithDuration(1.5, animations: {
   self.myFirstLabel.alpha = 1.0
   self.myFirstButton.alpha = 1.0
   self.mySecondButton.alpha = 1.0
  })
  </code></pre>
  
  <p><strong>I have all of this in my viewDidLoad function.</strong></p>
  
  <p>How do I make this work? </p>