SDWebImage 获取缓存大小

//获取缓存的大小  

//在获取缓存的方法写上这两句代码

NSUInteger intg = [[SDImageCache sharedImageCache] getSize];

//

NSString * currentVolum = [NSString stringWithFormat:@"%@",[self fileSizeWithInterge:intg]];

//计算出大小

- (NSString *)fileSizeWithInterge:(NSInteger)size{

    // 1k = 1024, 1m = 1024k

    if (size < 1024) {// 小于1k

        return [NSString stringWithFormat:@"%ldB",(long)size];

    }else if (size < 1024 * 1024){// 小于1m

        CGFloat aFloat = size/1024;

        return [NSString stringWithFormat:@"%.0fK",aFloat];

    }else if (size < 1024 * 1024 * 1024){// 小于1G

        CGFloat aFloat = size/(1024 * 1024);

        return [NSString stringWithFormat:@"%.1fM",aFloat];

    }else{

        CGFloat aFloat = size/(1024*1024*1024);

        return [NSString stringWithFormat:@"%.1fG",aFloat];

    }

}