title: Can I store a custom object inside a button in Objective-C?
body: <p>In winforms/C# most all UI Controls have a .Tag tag, so like myButton.Tag = myObject; where the Tag property is an 'object' type so you can basically store any type of object. How might I accomplish this in Objective-C/Cocoa? do all UI elements have something like .Tag where I can store an NSObject or something? If so, can you please provide an example. Thanks so much!</p>
  
  <p>Note: I did see the integer .Tag there, but I wanted an object tag. But I guess that doesn't exist. hoo well.</p>