problem while finding iphone memory programatically

Question

I am facing a strange problem with my iphone. It shows available memory as 278 Mb from settings and also in the itunes . But when i find it programatically like this

NSDictionary *fileSystemAttributes = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
double availableSpace = [[fileSystemAttributes objectForKey:NSFileSystemFreeSize] floatValue];

I am getting it as 458.0 Mb. Can any one help me out why i m having so much difference between both the values ?? As both the values should be same

Thanks in advance

Answer 1

The iPhone uses a solid state drive, which doubles as it's own system RAM. So it keeps a percentage of the total drive for use at runtime.

Go with the number iTunes is telling you, because otherwise there could be some critical system errors.