由于项目需求中要求计算出应用内的缓存文件的大小及清除工作，做了一个小小的模块提供给大家分享，随便说句买苹果还是选个16g以上的那样妈妈就不会担心你的内存不用够用了哦！
// 清除本地缓存文件
+ (void)clearCacheFile
{
NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachPath];
for (NSString *fileName in files)
{
NSError *error;
NSString *path = [cachPath stringByAppendingPathComponent:fileName];
if ([[NSFileManager defaultManager] fileExistsAtPath:path])
{
[[NSFileManager defaultManager] removeItemAtPath:path error:&error];
}
}
}
// 计算本地缓存文件大小
+ (double)getCacheFileSize
{
NSFileManager *fileManager = [NSFileManager defaultManager];
double fileSize = 0.0;
NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [fileManager subpathsAtPath:cachPath];
for (NSString *fileName in files)
{
NSString *path = [cachPath stringByAppendingPathComponent:fileName];
if ([fileManager fileExistsAtPath:path])
{
NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:path error:nil];
fileSize += (double)([fileAttributes fileSize]);
}
}
return fileSize;
}
原文：http://www.cnblogs.com/zero-zql/p/4806526.html