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< img src = "https://dl.dropboxusercontent.com/u/148921/assets/logo.svg" width = "100" / >
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Adds animated GIF support to UIKit. For the Japanese prefecture, click [here ](https://goo.gl/maps/CCeAc ).
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#### Why?
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Because Apple's `+animatedImage*` sucks, and the few third party implementations that
got it right (see [Credits ](#credits )) still require you to use a `UIImageView` subclass.
#### How?
Gifu is a `UIImage` subclass and `UIImageView` extension written in Swift.
It uses `CADisplayLink` to animate the view and only keeps a limited number of
frames in-memory, which exponentially minimizes memory usage for large GIF files (+300
frames).
The figure below summarizes how this works in practice. Given an image
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containing 10 frames, Gifu will load the current frame (red), pre-load the next two frames in this example (orange),
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and nullify all the other frames to free up memory (gray):
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< img src = "https://raw.githubusercontent.com/kaishin/gifu/master/figure.gif" width = "300" / >
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#### Usage
Use git submodules or drag-and-drop the files in your Xcode project. I can't
believe I'm saying this in 2014.
Once done, you can call `setAnimatableImage(named:)` or
`setAnimatableImage(data:)` on your `UIImageView` (or its subclass):
```swift
let imageView = UIImageView(...)
imageView.setAnimatableImage(named: "computer-kid.gif")
// or
imageView.setAnimatableImage(data: NSData(...))
```
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You can start/stop the animation using `UIImageView` 's `startAnimating()` and
`stopAnimating()` .
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You can find a demo [here ](https://github.com/kaishin/gifu/tree/demo ) (requires Xcode 6 Beta-7).
< img src = "https://raw.githubusercontent.com/kaishin/gifu/demo/demo.gif" width = "300" / >
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#### Compatibility
- iOS 7+
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#### Roadmap
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The usual suspects:
- Add documentation.
- Write some basic tests.
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Needless to say, you are welcome to contribute.
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#### Credits
- The animation technique described above was originally spotted on
[OLImageView ](https://github.com/ondalabs/OLImageView ), then improved in [YLGIFImage ](https://github.com/liyong03/YLGIFImage ).
- The font used in the logo is [Azuki ](http://www.myfonts.com/fonts/bluevinyl/azuki/ )
- Kudos to my colleague [Tony DiPasquale ](https://github.com/tonyd256 ) for helping out with the factory methods.
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- The characters used in the icon and example image in the demo are from [Samurai Champloo ](https://en.wikipedia.org/wiki/Samurai_Champloo ). The name and characters are property of their respective owners.
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#### License
See LICENSE.
