title: How to add drop shadow only for the right side?
body: <p>I am adding the drop shadow like this.</p>
  
  <pre><code>vwVertical=[[UIView alloc] init];
  [vwVertical setBackgroundColor:[UIColor whiteColor]];
  vwVertical.translatesAutoresizingMaskIntoConstraints = NO;
  vwVertical.layer.shadowColor=[UIColor colorWithRed:32/255 green:59/255 blue:90/255 alpha:1.0].CGColor;
  vwVertical.layer.shadowOffset=CGSizeMake(5, 0);
  vwVertical.layer.shadowOpacity=0.12;
  vwVertical.layer.shadowRadius=6.5;
  [vwBlock addSubview:vwVertical];
  </code></pre>
  
  <p>But this is adding shadow 3 sides. How can I add just to right side.
  Please help me.
  Thanks</p>