title: SpriteKit NSTimeInterval renamed
body: <p>I'm trying to use SpriteKit in my project but after I install it and open the project I get 28 errors. I tried to rename the 'NSTimeInterval' to 'TimeInterval' but it didn't work. I'm using Xcode 9.3</p>
  
  <p>This is my Podfile:</p>
  
  <pre><code>platform :ios, '9.0'
  
  target 'Aaa' do
    # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
    use_frameworks!
  
    # Pods for Aaa
      pod 'SpriteKit-Spring'
  end
  </code></pre>
  
  <p>I get these errors (27 are the same - 'NSTimeInterval' has been renamed to 'TimeInterval'):
  <a href="https://i.stack.imgur.com/d99WL.png" rel="nofollow noreferrer">Error list screenshot</a></p>
  
  <p><strong>Solution:</strong>
  In the Podfile have this line:</p>
  
  <pre><code>pod 'SpriteKit-Spring', :git =&gt; 'https://github.com/ataugeron/SpriteKit-Spring/'
  </code></pre>