mayoff/uiimage-from-animated-gif

A UIImage category that loads animated GIFs

Summary

This project defines a category animatedGIF on UIImage. The category defines two methods. This method creates an animated UIImage using the frames of the GIF in data:

+[UIImage animatedImageWithAnimatedGIFData:(NSData *)data]

This method creates an animated UIImage using the frames of the GIF loaded from url:

+[UIImage animatedImageWithAnimatedGIFURL:(NSURL *)url]

Look at the comments in UIImage+animatedGIF.h for details.

You can build and run the project to see a trivial demo app.

To use this category in your own project

1. Copy UIImage+animatedGIF.h and UIImage+animatedGIF.m to your project.
2. Add UIImage+animatedGIF.m to your target's “Compile Sources” build phase, if you didn't tell Xcode to do that when you performed step 1.
3. Add ImageIO.framework to your target's "Link Binary With Libraries" build phase.

Implementation notes

The implementation of this category uses the Image I/O Framework to extract the images and durations from the GIF data.

Diego Peinador provided the inspiration for handling variable-frame-rate animations, although I didn't end up using his code.

Copyright or lack thereof

The contents of this repository are dedicated to the public domain, in accordance with the CC0 1.0 Universal Public Domain Dedication, which is reproduced in the file COPYRIGHT.

Author: Rob Mayoff 2012-01-27

uiimage-from-animated-gif's Issues

Gif data not being released

I can't figure out if I am doing something wrong but the memory use of my app does not go down after I nil a gif image. Any thoughts?

transparent background of gif gets changed to white

example project works with my transparent gif, my own app doesnt and gives it a white background. any advice?

Slow gif

Please help. Some gifs are playing really slow. I'm getting the duration of the gif, and most gifs have 1s, and a few have 9s10s.
But if I check the duration of the gif manually, with an .exe i have in my Windows computer, it says the gifs have around 1s2s.
Does anyone knows what is causing this?
Btw, i'm using the latest swift version.

This isnt asynchronous :(

I am trying to use this in a uitableview and parsing the links from the web. but the problem is that this library is not Asynchronous. Any future plans to support that?

image disappearing in UITableViewCell

I'm using an animated image inside a UITableViewCell and when I scroll the image off screen, all the images disappear and I only see the background of the UIImageView.

Anyway to stop animation? Pause or otherwise?

Maybe this is outside the scope of the library, which is amazing by the way, but it would be really cool to be able to stop the animation?

There is a simple solution/hack of having a reference frame uiimage as well as the animated one, but if there were a way to pause the gif that would be awesome.

use kCGImagePropertyGIFUnclampedDelayTime

using kCGImagePropertyGIFDelayTime means that certain gifs play slowly

What license is this under?

Hey there,

What license is this released under? It would be really awesome if it was under the MIT license.

Thanks!

Just thanks you

Just thanks you 👍

High memory usage

Here is example gif. After decoding it and show on the screen, memory usage increase to 95 mb in empty application.
Example code http://paste.org.ru/?ix5w5s

How can I decrease memory usage?

Methods to find length of .gif and if it is animating

The regular [UIImage isAnimating] method is not working and it would be great if I could get the total length of an animated gif. -1 if it is an infinite animation. Finally, the ability to stop/start an animation at a given frame would be great.

Any way to load faster?

I put it into a background thread, still not fast enough. Any suggestions?

int i = 0; for (UIImageView *imageView in self.featuredPhotoImageViewCollection) { dispatch_async(dispatch_queue_create("imageQueue", NULL), ^{ NSURL *url = [NSURL URLWithString:[featuredPhotos[i] valueForKey:@"url"]]; UIImage *image = [UIImage animatedImageWithAnimatedGIFURL:url]; dispatch_async(dispatch_get_main_queue(), ^{ imageView.image = image; }); }); i++; }

UI blocked, nothing happened.

When I assign the URL for loading the Gif file, UI has been halted nothing happened.

Does this work with animated .jpg image?

As in title.

Use hight memory. Should use FLAnimatedImage

https://github.com/Flipboard/FLAnimatedImage

How to stop the animation?

Converting back to data?

Finally got the gif off the pastboard and onto the screen. Problem is I can't get it off the textView and back into NSData. Using UIImagePNGRep... doesn't work. How can I convert the image back to data without saving it in a property?