White Background after cache in disk

[silvaric]

I really don't understand why my png's images are with white background after i store in disk..

code

[_imageCacheChannel queryDiskCacheForKey:key done:^(UIImage *image, SDImageCacheType cacheType) {

        if (image) {

            completedBlock(image,nil);

        }else{

            /////////
            // *    Request Image
            /////////

            dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

                [[SDWebImageDownloader sharedDownloader] downloadImageWithURL:ObjectOrEmptyString(url)
                                                                      options:SDWebImageProgressiveDownload
                                                                     progress:^(NSInteger receivedSize, NSInteger expectedSize) {}
                                                                    completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) {

                                                                        if (finished){

                                                                            if (image) {
                                                                                [_imageCacheChannel storeImage:image forKey:key];
                                                                            }

                                                                            completedBlock(image,error);
                                                                        }
                                                                    }];
            });
        }
    }]

if i change the way to store to

 [_imageCacheChannel storeImage:image forKey:key toDisk:NO];

The image will be transparency like i want but i don't want to request the image every time i open the app (after kill) i want to store in the disk

[silvaric]

I use this :

[_imageCacheChannel storeImage:image recalculateFromImage:NO imageData:data forKey:key toDisk:YES]

It resolved but is strange why i need to have this 'recalculateFromImage:NO' to have transparency after i get image from disk =/

Anyway sorry for the issue and thanks for the SDWebImage ;)