woshizilong / dfimagemanager Goto Github PK

[[[DFImageManager sharedManager] imageTaskForResource:[NSURL URLWithString:@"http://..."] completion:^(UIImage *image, NSError *error, DFImageResponse *response, DFImageTask *task){
    // Use loaded image
}] resume];

NSURL *imageURL = [NSURL URLWithString:@"http://..."];

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

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

[[[DFImageManager sharedManager] 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 *imageTask = [[DFImageManager sharedManager] imageTaskForResource:[NSURL URLWithString:@"http://..."] completion:nil];
[imageTask resume];

// Use progress object to track load progress
NSProgress *progress = imageTask.progress;

// Change priority of the already executing task
imageTask.priority = DFImageRequestPriorityHigh;

// Cancel image task
[imageTask cancel];

UIImageView *imageView = ...;
[imageView df_setImageWithResource:[NSURL URLWithString:@"http://..."]];

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

[imageView prepareForReuse];
[imageView setImageWithResource:[NSURL URLWithString:@"http://..."]];

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:<#reuse_id#> forIndexPath:indexPath];
    cell.backgroundColor = [UIColor colorWithWhite:235.f/255.f alpha:1.f];

    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 *imageView = (id)[cell viewWithTag:15];
    [imageView prepareForReuse];
}

NSArray *requestsForAddedItems = ...; // Create image requests
[[DFImageManager sharedManager] startPreheatingImagesForRequests:requestsForAddedItems];

NSArray *requestsForRemovedItems = ...; // Create image requests
[[DFImageManager sharedManager] stopPreheatingImagesForRequests:requestsForRemovedItems];

PHAsset *asset = ...;
DFImageRequest *request = [DFImageRequest requestWithResource:asset targetSize:CGSizeMake(100.f, 100.f) contentMode:DFImageContentModeAspectFill options:nil];
[[[DFImageManager sharedManager] imageTaskForRequest:request completion:^(UIImage *image, NSDictionary *info) {
    // Image resized to 100x100px square
}] resume];

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

// Create image request that allows progressive image
DFMutableImageRequestOptions *options = [DFMutableImageRequestOptions new];
options.allowsProgressiveImage = YES;
DFImageRequest *request = // Create request with given options

DFImageTask *imageTask = .../ Create image task
imageTask.progressiveImageHandler = ^(UIImage *__nonnull image){
    imageView.image = image;
};

[imageTask resume];

// Create dependencies. You can either use existing classes or provide your own.
id<DFImageFetching> fetcher = ...; // Create image fetcher
id<DFImageDecoding> decoder = ...; // Create image decoder
id<DFImageProcessing> processor = ...; // Create image processor
id<DFImageCaching> cache = ...; // Create image cache

// Create configuration to inject dependencies
DFImageManagerConfiguration *configuration = [[DFImageManagerConfiguration alloc] initWithFetcher:fetcher];
configuration.decoder = decoder;
configuration.processor = processor;
configuration.cache = cache;

// Create image manager with configuration
DFImageManager *imageManager = [[DFImageManager alloc] initWithConfiguration:configuration];

id<DFImageManaging> manager = ...; // Create image manager

// Create composite manager with your custom manager and all built-in managers.
NSArray *managers = @[ manager, [DFImageManager sharedManager] ];
id<DFImageManaging> compositeImageManager = [[DFCompositeImageManager alloc] initWithImageManagers:managers];

// Use dependency injector to set shared manager
[DFImageManager setSharedManager:compositeImageManager];