resize an to a specific size without losing its quality in iphone

I want to resize an image to a particular width and height w开发者_如何转开发ithout losing its image quality in iphone.

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Resize the frame of the image view that contains the image. The image won't change, but it will get smaller. This way you can use the same image for older iPhone screens and Retina Display screens.

If you want to resize the image (so that it takes up less storage space) you'll always lose quality.