iOS SDWebImage缓存

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从4.0.0更新到5.0.1部分更新内容

获取缓存的方法改变了

原版如下：

#pragma mark - Cache Info

/**
 * Get the size used by the disk cache
 */
- (NSUInteger)getSize;

/**
 * Get the number of images in the disk cache
 */
- (NSUInteger)getDiskCount;

/**
 * Asynchronously calculate the disk cache's size.
 */
- (void)calculateSizeWithCompletionBlock:(nullable SDWebImageCalculateSizeBlock)completionBlock;

新版如下：

#pragma mark - Cache Info

/**
 * Get the total bytes size of images in the disk cache
 */
- (NSUInteger)totalDiskSize;

/**
 * Get the number of images in the disk cache
 */
- (NSUInteger)totalDiskCount;

/**
 * Asynchronously calculate the disk cache's size.
 */
- (void)calculateSizeWithCompletionBlock:(nullable SDImageCacheCalculateSizeBlock)completionBlock;

详情请参考GitHub: SDWebImage