Open Radar

 
Summary:
I would like to send the frames of an animated image as jpeg to save space. The documentation says  "To cache images for an animation, cache the entire animation as a single UIImage object and then convert that image to an NSData object. You can create such an image object using the animatedImageWithImages:duration: method." so it seems that I should be able to do this. However UIImageJPEGRepresentation does not render data for an animated image. I have also tried to cache the frames individually and that did not work. Here is a gist for example code. https://gist.github.com/datinc/3c671cbc2a04fd395122

Steps to Reproduce:
UIImage* animatedImage = [UIImage animatedImageWithImages:images duration:0.4];
NSData* data = UIImageJPEGRepresentation(animatedImage, 0.3);
UIImage* image = [UIImage imageWithData:data];
NSLog(@"%ld should equal %ld", (long)animatedImage.images.count, (long)image.images.count);
[[WKInterfaceDevice currentDevice] addCachedImageWithData:data name:@"image"]

...

[self.wkimage setImageNamed:@"image"];
[self.wkimage startAnimating];

Expected Results:
Animated images are jpeg

Actual Results:
UIImage is not serializes to include animation. 

Version:
Latest

Notes:


Configuration:
Apple Watch

Attachments: