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Request and receive images in background queue

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This commit is contained in:
Adlai Holler 2015-09-26 19:17:43 -07:00
parent ffa0829fc9
commit f6fe3b07d8
1 changed files with 27 additions and 23 deletions
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10
AsyncDisplayKit/ASMultiplexImageNode.mm
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@ -517,6 +517,8 @@ typedef void(^ASMultiplexImageLoadCompletionBlock)(UIImage *image, id imageIdent
ASDisplayNodeAssertNotNil(request, @"request is required");
ASDisplayNodeAssertNotNil(completionBlock, @"completionBlock is required");
// This is sometimes called on main but there's no reason to stay there
dispatch_async(dispatch_get_global_queue(QOS_CLASS_DEFAULT, 0), ^{
// Get the PHAsset itself.
PHFetchResult *assetFetchResult = [PHAsset fetchAssetsWithLocalIdentifiers:@[request.assetIdentifier] options:nil];
if ([assetFetchResult count] == 0) {
@ -525,11 +527,12 @@ typedef void(^ASMultiplexImageLoadCompletionBlock)(UIImage *image, id imageIdent
return;
}
// Get the best image we can.
PHAsset *imageAsset = [assetFetchResult firstObject];
PHImageRequestOptions *options = [request.options copy];
if (options.deliveryMode == PHImageRequestOptionsDeliveryModeOpportunistic) {
options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
if (options.deliveryMode == PHImageRequestOptionsDeliveryModeHighQualityFormat) {
// Without this flag the result will be delivered on the main queue, which is pointless
// But synchronous -> HighQualityFormat so we only use it if high quality format is specified
options.synchronous = YES;
}
[[PHImageManager defaultManager] requestImageForAsset:imageAsset
@ -539,6 +542,7 @@ typedef void(^ASMultiplexImageLoadCompletionBlock)(UIImage *image, id imageIdent
resultHandler:^(UIImage *image, NSDictionary *info) {
completionBlock(image, info[PHImageErrorKey]);
}];
});
}
- (void)_fetchImageWithIdentifierFromCache:(id)imageIdentifier URL:(NSURL *)imageURL completion:(void (^)(UIImage *image))completionBlock