title: Override setter with arc
body: <pre><code>@interface Article : NSObject 
  
  @property (nonatomic, strong) NSString *imageURLString;
  
  @end
  
  
  @implementation Class
  
  @synthesize imageURLString = _imageURLString;
  
  - (void)setImageURLString:(NSString *)imageURLString {
      _imageURLString = imageURLString;
      //do something else
  }
  </code></pre>
  
  <p>Did I correctly override the setter when ARC is enabled?</p>