title: How to use Swift struct in Objective-C
body: <p>Simply I have a struct that stores the application constants as below:</p>
  
  <pre><code>struct Constant {
  
      static let ParseApplicationId = "xxx"
      static let ParseClientKey = "xxx"
  
      static var AppGreenColor: UIColor {
          return UIColor(hexString: "67B632")
      }
  }
  </code></pre>
  
  <p>These constants can be use in Swift code by calling <code>Constant.ParseClientKey</code> for example. But in my code, it also contains some Objective-C classes. So my question is how to use these constants in the Objective-C code? </p>
  
  <p>If this way to declare constants is not good then what is the best way to create global constants to be used in both Swift and Objective-C code?</p>