SDWebimage清空缓存

清空缓存

- (void)clearTmpPics{
[[SDImageCache sharedImageCache] clearDisk];
[[SDImageCache sharedImageCache] clearMemory];//可有可无
}

或

[[SDImageCache sharedImageCache] clearDiskOnCompletion:^{
      //清理完成
 }];

计算缓存：

 NSUInteger ss = [[SDImageCache sharedImageCache] getSize];
    float sf = (float)ss;
    float tmpSize = sf/ 1024.0 / 1024.0;
    NSString *clearCacheName = tmpSize >= 1 ? [NSString stringWithFormat:@"%.2fM",tmpSize] : [NSString stringWithFormat:@"%.2fK",tmpSize * 1024];

  [SDImageCache sharedImageCache].maxMemoryCost = 100*1024*1024;//最多缓存100M
    [SDImageCache sharedImageCache].maxMemoryCountLimit = 100;//最多能缓存多少张图片