直接从SDWebImage的缓存中取图片(sdwebimage内存缓存)

#import "SDWebImageManager.h" #import "SDImageCache.h" NSString* strUrl = @"http://xxx.com/x.jpg"; SDWebImageManager *manager = [SDWebImageManager sharedManager]; NSString* key = [manager cacheKeyForURL:[NSURL URLWithString:strUrl]]; SDImageCache* cache = [SDImageCache sharedImageCache]; //此方法会先从memory中取。 image = [cache imageFromDiskCacheForKey:key];