Getting file path of image cached on disk

[lammertw]

If would be nice if there was an easy way to get the file path of an image that is cached on disk. It could be as easy as making the cachePathForKey: method in SDImageCache public.

The reason why I personally need it is for the UIDocumentInteractionController to share images with other apps. This class requires the file path to an image. Also it requires a png extension of the file.

[gardnermj]

I'll second this, or alternatively a method similar to queryDiskCacheForKey that returns the bare NSData from the disk cache:

- (void)queryOnlyDiskCacheForKey:(NSString *)key done:(void (^)(NSData *data, SDImageCacheType cacheType))doneBlock {
    if (!doneBlock) return;

    if (!key)
    {
        doneBlock(nil, SDImageCacheTypeNone);
        return;
    }

    dispatch_async(self.ioQueue, ^
    {
        NSData *data = [NSData dataWithContentsOfFile:[self cachePathForKey:key]];

        dispatch_async(dispatch_get_main_queue(), ^
        {
            doneBlock(data, SDImageCacheTypeDisk);
        });
    });
}

[pattrawoots]

I also would like SDWebImage to allow to get file path of image cached on disk. Exactly the same reason as @lammertw

[hlcfan]

ya, I need this method too.

[deni2s]

I also need it.

[mkll]

There are private SDImageCache methods to get filesystem path to image. Just make these methods public with category. Put the code below into the SDImageCache+Private.h and add it to your project:

#import "SDImageCache.h"

@interface SDImageCache (PrivateMethods)

- (NSString *)defaultCachePathForKey:(NSString *)key;
- (NSString *)cachedFileNameForKey:(NSString *)key;

@end