react-native/Libraries/Image/RCTImageDownloader.h

46 lines
1.6 KiB
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import <UIKit/UIKit.h>
typedef void (^RCTDataDownloadBlock)(NSData *data, NSError *error);
typedef void (^RCTImageDownloadBlock)(UIImage *image, NSError *error);
@interface RCTImageDownloader : NSObject
+ (instancetype)sharedInstance;
/**
* Downloads a block of raw data and returns it. Note that the callback block
* will not be executed on the same thread you called the method from, nor on
* the main thread. Returns a token that can be used to cancel the download.
*/
- (id)downloadDataForURL:(NSURL *)url
block:(RCTDataDownloadBlock)block;
/**
* Downloads an image and decompresses it a the size specified. The compressed
* image will be cached in memory and to disk. Note that the callback block
* will not be executed on the same thread you called the method from, nor on
* the main thread. Returns a token that can be used to cancel the download.
*/
- (id)downloadImageForURL:(NSURL *)url
size:(CGSize)size
scale:(CGFloat)scale
block:(RCTImageDownloadBlock)block;
/**
* Cancel an in-flight download. If multiple requets have been made for the
* same image, only the request that relates to the token passed will be
* cancelled.
*/
- (void)cancelDownload:(id)downloadToken;
@end