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[ASMultiplexImageNode] Do not request already-loaded images from data source to avoid loop

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This commit is contained in:
Adlai Holler
2016-05-06 21:45:31 -07:00
parent c3ae0d7673
commit 253692df65
1 changed files with 5 additions and 1 deletions
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6
AsyncDisplayKit/ASMultiplexImageNode.mm
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@@ -436,8 +436,12 @@ typedef void(^ASMultiplexImageLoadCompletionBlock)(UIImage *image, id imageIdent
}
// Grab the best available image from the data source.
UIImage *existingImage = self.image;
for (id imageIdentifier in _imageIdentifiers) {
UIImage *image = [_dataSource multiplexImageNode:self imageForImageIdentifier:imageIdentifier];
// If this image is already loaded, don't request it from the data source again because
// the data source may generate a new instance of UIImage that returns NO for isEqual:
// and we'll end up in an infinite loading loop.
UIImage *image = ASObjectIsEqual(imageIdentifier, _loadedImageIdentifier) ? existingImage : [_dataSource multiplexImageNode:self imageForImageIdentifier:imageIdentifier];
if (image) {
if (imageIdentifierOut) {
*imageIdentifierOut = imageIdentifier;