ios 计算缓存大小并清理缓存

SDWebImage、WebView产生的缓存

1、计算缓存大小

//SDWebImage缓存大小

　　 UILabel *cleanDetailText = [[UILabel alloc]init];

unsigned long iLength = [[SDImageCache sharedImageCache]getSize]/1024.0;

if(iLength > 1024.0)

{

iLength = iLength/1024.0;

NSString *sLength = [NSString stringWithFormat:@"%lu",iLength];

cleanDetailText.text = [sLength stringByAppendingString:@"M"];

}

else

{

NSString *sLength = [NSString stringWithFormat:@"%lu",iLength];

cleanDetailText.text = [sLength stringByAppendingString:@"kb"];

}

　　//WebView缓存大小

　　NSInteger sizeInteger = [[NSURLCache sharedURLCache] currentDiskUsage];

　　float sizeInMB = sizeInteger / (1024.0f * 1024.0f);

2、清理缓存

　　//SDWebImage清理缓存

　　[[[SDWebImageManager sharedManager]imageCache]clearDisk];

　　[[[SDWebImageManager sharedManager]imageCache]clearMemory];

　　//WebView清理缓存

　　[[NSURLCache sharedURLCache]removeAllCachedResponses];