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Add a better check to handle the cases when call `storeImage` without imageData. Firstly check SDAnimatedImage, then check sd_imageFormat.

This commit is contained in:
DreamPiggy 2020-03-01 18:38:40 +08:00
parent f4548bba5c
commit 3df399508e
1 changed files with 13 additions and 6 deletions
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19
SDWebImage/Core/SDImageCache.m
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@ -187,13 +187,20 @@
dispatch_async(self.ioQueue, ^{
@autoreleasepool {
NSData *data = imageData;
if (!data && [image conformsToProtocol:@protocol(SDAnimatedImage)]) {
// If image is custom animated image class, prefer its original animated data
data = [((id<SDAnimatedImage>)image) animatedImageData];
}
if (!data && image) {
// If we do not have any data to detect image format, check whether it contains alpha channel to use PNG or JPEG format
SDImageFormat format;
if ([SDImageCoderHelper CGImageContainsAlpha:image.CGImage]) {
format = SDImageFormatPNG;
} else {
format = SDImageFormatJPEG;
// Check image's associated image format, may return .undefined
SDImageFormat format = image.sd_imageFormat;
if (format == SDImageFormatUndefined) {
// If we do not have any data to detect image format, check whether it contains alpha channel to use PNG or JPEG format
if ([SDImageCoderHelper CGImageContainsAlpha:image.CGImage]) {
format = SDImageFormatPNG;
} else {
format = SDImageFormatJPEG;
}
}
data = [[SDImageCodersManager sharedManager] encodedDataWithImage:image format:format options:nil];
}