title: Creating a blur effect in iOS7
body: <p>I have been searching for an answer to this question in a few hours now, and I just can't figure it out. I want to add a gaussian blur effect to the image when i press the button "Button". The user is the one that is adding the image. </p>
  
  <p>I have created an action for the "Button" based on sources from SO and other places on the web. It will not work. What am I doing wrong? Any code would be greatly appreciated.  Here is my "Button" action: </p>
  
  <pre><code>- (IBAction)test:(id)sender {
      CIFilter *gaussianBlurFilter = [CIFilter filterWithName: @"CIGaussianBlur"];
      [gaussianBlurFilter setValue:imageView.image forKey: @"inputImage"];
      [gaussianBlurFilter setValue:[NSNumber numberWithFloat: 10] forKey: @"inputRadius"];
  }
  </code></pre>
  
  <p>If you need anything else that I have done to answer the question, please let me know :D</p>
  
  <p><img src="https://i.stack.imgur.com/V7KUF.png" alt="Here is my UI"></p>