从iPhone上的statfs阻止到kb/mb/gb

块大小为4096字节或4KB。因此,63425块为63425*4KB=253700KB,约为248MB。

我成功地使用了以下各项:

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

struct statfs tStats;

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

unsigned long long Available = ((unsigned long long)tStats.f_bavail) * ((unsigned long long)tStats.f_bsize);

if (Available > 1024)
{
    //Kilobytes
    Available = Available / 1024;

    diskSpaceLbl.text = [[@"Available Disk Space: " stringByAppendingFormat:@"%llu", Available] stringByAppendingString:@" KB"];
}

if (Available > 1024)
{
    //Megabytes
    Available = Available / 1024;

    diskSpaceLbl.text = [[@"Available Disk Space: " stringByAppendingFormat:@"%llu", Available] stringByAppendingString:@" MB"];
}

if (Available > 1024)
{
    //Gigabytes
    Available = Available / 1024;

    diskSpaceLbl.text = [[@"Available Disk Space: " stringByAppendingFormat:@"%llu", Available] stringByAppendingString:@" GB"];
}