title: IOS: problem with resize a UIImage
body: <p>I wanto to resize an UIImage and I try this code:</p>
  
  <pre><code>UIImage *newImage = [image1toResize _imageScaledToSize:CGSizeMake(290, 390) interpolationQuality:1]; 
  </code></pre>
  
  <p>but I have this warning:
  warning: 'UIImage' may not respond to '-_imageScaledToSize:'</p>
  
  <p>why?</p>