title: How to add CIFilter to CALayer
body: <p>I am new to core animation , i add some layers to my view and add image to it.
  Now i want to give blur effect to my layer </p>
  
  <p>But i don't know how to make CIFilter and add it.
  I go through the related questions 
  <a href="https://stackoverflow.com/questions/1164797/how-can-i-use-cifilter-in-iphone-os">Question 1</a> <a href="https://stackoverflow.com/questions/483039/cifilter-available-in-the-iphone-sdk" > Question2</a><p></p>
  
  <hr>
  
  <p>My code is given below (Shows compilation error)</p>
  
  <pre><code>#import &lt; UIKit/UIKit.h &gt;
  #import &lt; QuartzCore/QuartzCore.h &gt;
  #import &lt; CoreGraphics/CoreGraphics.h &gt;
  
  
  @interface T_CALayerPart3_View : UIView {
  
      CALayer *_layer1;
      CALayer *_layer2;
      CALayer *_layer3;
      CALayer *_layer4;
      CALayer *_layer5;
      CIFilter *_filter;    //&lt;----- error here[Expected specifier -qualifier -list before CIFilter]
  
      CATransform3D *_rotate, *_scale;
  
  }
  @end
  </code></pre>
  
  <p>Give me some suggestion. Your suggestion is important to me. Don't leave the page without any  Answer/ comment.</p>
  
  <p>[sorry for my poor English]</p>