title: Is there a way to set variables for NSObjects without creating properties for each?
body: <p>Basically, I have a custom NSObject with a lot of boolean variables. I would like to know if there is a way to modify these variables (from outside this class) without creating a property for each one. Is this possible? Thanks in advance!
  Here is part of my object's header:</p>
  
  <pre><code>@interface Polygons : NSObject {
  
  //BOOL values for attributes
  BOOL parallelogram;
  BOOL rhombus;
  BOOL square;
  
  ...
  
  }
  </code></pre>