title: Why it will complain when I want to use Identifiable and add id by UUID()?
body: <pre><code>struct Todo : Equatable,Identifiable {
      var id = UUID()
      var content :String
  
      static func ==(lhs: Todo, rhs: Todo) -&gt;  Bool{
          return lhs.content == rhs.content
      }//Equatable Protacol's things
  }
  </code></pre>