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Try to workaround iOS 15+ crash that CGImage retain the CGImageSource during animation image playing 

This used to work on iOS 14
This commit is contained in:
DreamPiggy 2022-08-11 14:51:02 +08:00
parent 524d4f53eb
commit 3994006cb4
2 changed files with 27 additions and 6 deletions
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2
CHANGELOG.md
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@ -1,5 +1,5 @@
## [5.13.2 - 5.13 Patch, on Jul 23th, 2022](https://github.com/rs/SDWebImage/releases/tag/5.13.2)
See [all tickets marked for the 5.13.1 release](https://github.com/SDWebImage/SDWebImage/milestone/99)
See [all tickets marked for the 5.13.2 release](https://github.com/SDWebImage/SDWebImage/milestone/99)
### Fixes
- Fix the rare case when cancel an async disk cache query may cause twice callback #3380 #3374

25
SDWebImage/Core/SDImageIOAnimatedCoder.m
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@ -627,15 +627,36 @@ static NSString * kSDCGImageDestinationRequestedFileSize = @"kCGImageDestination
if (index >= _frameCount) {
return nil;
}
// Animated Image should not use the CGContext solution to force decode. Prefers to use Image/IO built in method, which is safer and memory friendly, see https://github.com/SDWebImage/SDWebImage/issues/2961
NSDictionary *options = @{
NSDictionary *options;
BOOL isDecoded = YES;
if (@available(iOS 15, tvOS 15, *)) {
// iOS 15+, CGImageRef now retains CGImageSourceRef internally. To workaround its thread-safe issue, we have to strip CGImageSourceRef, using Force-Decode (or have to use SPI `CGImageSetImageSource`), See: https://github.com/SDWebImage/SDWebImage/issues/3273
isDecoded = NO;
options = @{
(__bridge NSString *)kCGImageSourceShouldCacheImmediately : @(NO),
(__bridge NSString *)kCGImageSourceShouldCache : @(NO)
};
} else {
// Animated Image should not use the CGContext solution to force decode on lower firmware. Prefers to use Image/IO built in method, which is safer and memory friendly, see https://github.com/SDWebImage/SDWebImage/issues/2961
isDecoded = YES;
options = @{
(__bridge NSString *)kCGImageSourceShouldCacheImmediately : @(YES),
(__bridge NSString *)kCGImageSourceShouldCache : @(YES) // Always cache to reduce CPU usage
};
}
UIImage *image = [self.class createFrameAtIndex:index source:_imageSource scale:_scale preserveAspectRatio:_preserveAspectRatio thumbnailSize:_thumbnailSize options:options];
if (!image) {
return nil;
}
if (!isDecoded) {
image = [SDImageCoderHelper decodedImageWithImage:image];
#if DEBUG
// Assert here to check CGImageRef should not retain the CGImageSourceRef and has possible thread-safe issue (this is behavior on iOS 15+)
// If assert hit, fire issue to https://github.com/SDWebImage/SDWebImage/issues and we update the condition for this behavior check
extern CGImageSourceRef CGImageGetImageSource(CGImageRef);
NSCAssert(!CGImageGetImageSource(image.CGImage), @"Animated Coder created CGImageRef should not retain CGImageSourceRef, which may cause thread-safe issue without lock");
#endif
}
image.sd_imageFormat = self.class.imageFormat;
image.sd_isDecoded = YES;
return image;