https://github.com/mattgemmell/MGImageUtilities

Useful UIImage categories for iPhone/iPad developers.
https://github.com/mattgemmell/MGImageUtilities

Last synced: about 1 month ago
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Useful UIImage categories for iPhone/iPad developers.

• Host: GitHub
• URL: https://github.com/mattgemmell/MGImageUtilities
• Owner: mattgemmell
• Created: 2010-07-05T08:37:04.000Z (over 14 years ago)
• Default Branch: master
• Last Pushed: 2012-11-26T17:20:27.000Z (about 12 years ago)
• Last Synced: 2024-10-28T14:46:04.146Z (about 1 month ago)
• Language: Objective-C
• Homepage: http://mattgemmell.com/
• Size: 198 KB
• Stars: 828
• Watchers: 34
• Forks: 144
• Open Issues: 7
• Metadata Files:
  • Readme: README.markdown

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README

        
MGImageUtilities

================

This is a demo project (for iPhone, but the code will work just fine on iPad too) showing two categories on UIImage, as described below.

UIImage+ProportionalFill

------------------------

This category lets you resize an arbitrary image to fit into an arbitrary size, using one of four resizing methods:

- Scale: scales the image proportionally to fit entirely into the required size.

- Crop: scales the image proportionally to completely fill the required size, cropping towards its center. This is the most useful method.

- Start: as for Crop, but crops towards the "start" of the image (the top or left, depending on relative aspect ratios).

- End: as for Crop, but crops towards the "end" of the image (the bottom or right, depending on relative aspect ratios).

This is very useful for caching on-screen-sized versions of images, and generating appropriate images for use on a Retina Display. The category will do the right thing based on the image's orientation metadata, and the scale factor of the device's main screen (i.e. it'll look sharp on high-resolution devices like an iPhone 4).

UIImage+Tint

------------

This category takes an image (presumably flat and solid-coloured, like a toolbar icon), and fills its non-transparent pixels with a given colour. You can optionally also specify a fractional opacity at which to composite the original image over the colour-filled region, to give a tinting effect.

This is very useful for generating multiple different-coloured versions of the same image, for example 'disabled' or 'highlighted' states of the same basic image, without having to make multiple different-coloured bitmap image files.

License

-------

The license for the code is included with this project; it's basically a BSD license with attribution.

I can't answer any questions about how to use the code, but I always welcome emails telling me that you're using it or just saying thanks. I hope you find it useful!

Cheers,  

Matt Legend Gemmell  

http://mattgemmell.com/