title: iOS: Override setter property from superclass in subclass
body: <p>I need to override setter of super class in my subclass</p>
  
  <p>SuperClass:</p>
  
  <p>Interface Public:</p>
  
  <pre><code> @property (weak, nonatomic) UIView *mediaView;
  </code></pre>
  
  <p>Implementation:</p>
  
  <pre><code> - (void)setMediaView:(UIView *)mediaView
  {
   // some code
  }
  </code></pre>
  
  <p>SubClass:</p>
  
  <p>Implementation:</p>
  
  <pre><code> - (void)setMediaView:(UIView *)mediaView
  {
   // some code
   _mediaView = mediaView; --- ERROR: Use of undeclared identifier '_mediaView'
   // some code 
  }
  </code></pre>
  
  <p>How can I fix it? I need to set this property directly </p>