iOS SDWebImage手动清除缓存的方法

- (float)checkTmpSize  
{  
    float totalSize = 0;  
    NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:diskCachePath];  
    for (NSString *fileName in fileEnumerator)  
    {  
        NSString *filePath = [diskCachePath stringByAppendingPathComponent:fileName];  
  
        NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];  
  
        unsigned long long length = [attrs fileSize];  
  
        totalSize += length / 1024.0 / 1024.0;  
    }  
//    NSLog(@"tmp size is %.2f",totalSize);  
  
    return totalSize;  
}

[[SDImageCache sharedImageCache] getSize];

#pragma 清理缓存图片  
  
- (void)clearTmpPics  
{  
    [[SDImageCache sharedImageCache] clearDisk];  
  
//    [[SDImageCache sharedImageCache] clearMemory];//可有可无  
  
    DLog(@"clear disk");      
  
    float tmpSize = [[SDImageCache sharedImageCache] checkTmpSize];  
  
    NSString *clearCacheName = tmpSize >= 1 ? [NSString stringWithFormat:@"清理缓存(%.2fM)",tmpSize] : [NSString stringWithFormat:@"清理缓存(%.2fK)",tmpSize * 1024];  
  
    [configDataArray replaceObjectAtIndex:2 withObject:clearCacheName];  
  
    [configTableView reloadData];  
}