iOS获取存储空间大小

• 获取设备总的存储空间：

- (float)getTotalDiskSpace{
    float totalsize = 0.0;
    NSError *error = nil;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
    if (dictionary)
    {
       NSNumber *_total = [dictionary objectForKey:NSFileSystemSize];
       totalsize = [_total unsignedLongLongValue]*1.0;
    } else
    {
       NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %ld", [error domain], (long)[error code]);
    }
    return totalsize;
}

• 获取设备可用存储空间：

-(float)getFreeDiskSpace{
    float freesize = 0.0;
    NSError *error = nil;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
    if (dictionary)
    {
       NSNumber *_free = [dictionary objectForKey:NSFileSystemFreeSize];
       freesize = [_free unsignedLongLongValue]*1.0;
    } else
    {
       NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %ld", [error domain], (long)[error code]);
    }
    return  freesize;
}

调用：

float total = [self getTotalDiskSpace];
NSLog(@"total:%f GB",total/(1024*1024*1024));
    
float free = [self getFreeDiskSpace];
NSLog(@"free:%f GB",free/(1024*1024*1024));