title: What is the Objective-C "constructor"?
body: <p>I have this class:</p>
  
  <pre><code>@interface RSSEntry : NSObject{
      NSString *blogTitle;
      NSString *articleTitle;
      NSString *articleUrl;
      NSDate *articleDate;
  }
  
  @property (copy) NSString *blogTitle;
  @property (copy) NSString *articleTitle;
  @property (copy) NSString *articleUrl;
  @property (copy) NSDate *articleDate;
  
  @end
  </code></pre>
  
  <p>Now, how will I make these member variables get initialized when creating an object, especially when ARC is enabled in the Xcode project? I'm new to Objective-C; I'm looking for something like constructor from C base languages.</p>