IPhone 取得剩馀磁碟空间/全部磁碟空间

这段代码示范怎么取得iphone的剩馀磁碟空间,还有全部磁碟空间

#include

#include

long long freeSpace() {

struct statfs buf;

long long freespace = -1;

if(statfs("/", &buf) >= 0){

freespace = (long long)buf.f_bsize * buf.f_bfree;

}

return freespace;

}

+(float)getTotalDiskSpaceInBytes {

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

struct statfs tStats;

statfs([[paths lastObject] cString], &tStats);

float totalSpace = (float)(tStats.f_blocks * tStats.f_bsize);

return totalSpace;

}