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- /*
- * This file is part of the SDWebImage package.
- * (c) Olivier Poitrey <rs@dailymotion.com>
- * (c) Fabrice Aneche
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- #import <Foundation/Foundation.h>
- #import "SDWebImageCompat.h"
- @interface UIImage (ExtendedCacheData)
- /**
- Read and Write the extended object and bind it to the image. Which can hold some extra metadata like Image's scale factor, URL rich link, date, etc.
- The extended object should conforms to NSCoding, which we use `NSKeyedArchiver` and `NSKeyedUnarchiver` to archive it to data, and write to disk cache.
- @note The disk cache preserve both of the data and extended data with the same cache key. For manual query, use the `SDDiskCache` protocol method `extendedDataForKey:` instead.
- @note You can specify arbitrary object conforms to NSCoding (NSObject protocol here is used to support object using `NS_ROOT_CLASS`, which is not NSObject subclass). If you load image from disk cache, you should check the extended object class to avoid corrupted data.
- @warning This object don't need to implements NSSecureCoding (but it's recommended), because we allows arbitrary class.
- */
- @property (nonatomic, strong, nullable) id<NSObject, NSCoding> sd_extendedObject;
- @end
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