kean/DFImageManager

[[DFImageManager imageTaskForResource:<#imageURL#> completion:^(UIImage *image, NSError *error, DFImageResponse *response, DFImageTask *task){
    // Use loaded image
}] resume];

DFMutableImageRequestOptions *options = [DFMutableImageRequestOptions new]; // builder
options.priority = DFImageRequestPriorityHigh;
options.allowsClipping = YES;

DFImageRequest *request = [DFImageRequest requestWithResource:<#imageURL#> targetSize:CGSizeMake(100, 100) contentMode:DFImageContentModeAspectFill options:options.options];

[[DFImageManager imageTaskForRequest:request completion:^(UIImage *image, NSError *error, DFImageResponse *response, DFImageTask *imageTask) {
    // Image is resized and clipped to fill 100x100px square
    if (response.isFastResponse) {
        // Image was returned synchronously from the memory cache
    }
}] resume];

DFImageTask *task = [DFImageManager imageTaskForResource:<#imageURL#> completion:nil];
NSProgress *progress = task.progress;
task.priority = DFImageRequestPriorityHigh; // Change priority of executing task
[task cancel];

UIImageView *imageView = ...;
[imageView df_setImageWithResource:<#imageURL#>];

DFImageView *imageView = ...;
imageView.allowsAnimations = YES; // Animates images when the response wasn't fast enough
imageView.managesRequestPriorities = YES; // Automatically changes current request priority when image view gets added/removed from the window

[imageView prepareForReuse];
[imageView setImageWithResource:<#imageURL#>];

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    UICollectionViewCell *cell = <#cell#>
    DFImageView *imageView = (id)[cell viewWithTag:15];
    if (!imageView) {
        imageView = [[DFImageView alloc] initWithFrame:cell.bounds];
        imageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
        imageView.tag = 15;
        [cell addSubview:imageView];
    }
    [imageView prepareForReuse];
    [imageView setImageWithResource:<#image_url#>];
    return cell;
}

- (void)collectionView:(UICollectionView *)collectionView didEndDisplayingCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath {
    [((DFImageView *)[cell viewWithTag:15]) prepareForReuse];
}

NSArray<DFImageRequest *> *requestsForAddedItems = <#requests#>;
[DFImageManager startPreheatingImagesForRequests:requestsForAddedItems];

NSArray<DFImageRequest *> *requestsForRemovedItems = <#requests#>;
[DFImageManager stopPreheatingImagesForRequests:requestsForRemovedItems];

// Enable progressive image decoding
[DFImageManagerConfiguration setAllowsProgressiveImage:YES];

// Create image request that allows progressive image
DFMutableImageRequestOptions *options = [DFMutableImageRequestOptions new];
options.allowsProgressiveImage = YES;
DFImageRequest *request = <#request#>;

DFImageTask *task = <#task#>;
task.progressiveImageHandler = ^(UIImage *__nonnull image){
    imageView.image = image;
};
[task resume];

id<DFImageFetching> fetcher = <#fetcher#>;
id<DFImageDecoding> decoder = <#decoder#>;
id<DFImageProcessing> processor = <#processor#>;
id<DFImageCaching> cache = <#cache#>;

DFImageManagerConfiguration *configuration = [[DFImageManagerConfiguration alloc] initWithFetcher:fetcher];
configuration.decoder = decoder;
configuration.processor = processor;
configuration.cache = cache;

[DFImageManager setSharedManager:[[DFImageManager alloc] initWithConfiguration:configuration]];

id<DFImageManaging> manager1 = <#manager#>
id<DFImageManaging> manager2 = <#manager#>
id<DFImageManaging> composite = [[DFCompositeImageManager alloc] initWithImageManagers:@[manager1, manager2]];

pod 'DFImageManager'

pod 'DFImageManager'
pod 'DFImageManager/AFNetworking'
pod 'DFImageManager/GIF'
pod 'DFImageManager/WebP'
pod 'DFImageManager/PhotosKit'

github "kean/DFImageManager"