Question

I would like to retrieve the storage information programmatically like capacity, available storage, total number of apps, videos, pics etc.. Thanks in advance..

Answer 1

Looks like WrightsCS answered disk space question.

If you want number of images, check out ALAssetsLibrary of the AssetsLibrary.framework (you’ll have to include this framework in your “Link Binary With Libraries” section of the Target settings) and then:

#import <AssetsLibrary/AssetsLibrary.h>

// get the image assets

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
NSAssert(library, @"Unable to open ALAssetsLibrary");

NSUInteger __block images = 0;
[library enumerateGroupsWithTypes:ALAssetsGroupAll
                       usingBlock:^(ALAssetsGroup *group, BOOL *stop){
                           NSLog(@"%@", group);
                           images += group.numberOfAssets;
                           dispatch_async(dispatch_get_main_queue(), ^{
                               // update my UI with the number of images
                           });
                       }
                     failureBlock:^(NSError *err){
                         NSLog(@"err=%@", err);
                     }];

If you want to access the iTunes library on non-jailbroken devices, check out the iPod Library Access Programming Guide, which shows you how to use MPMediaQuery (remember to include the MediaPlayer.framework in your project), and then:

#import <MediaPlayer/MediaPlayer.h>

MPMediaQuery *everything = [[MPMediaQuery alloc] init];
NSAssert(everything, @"Unable to open MPMediaQuery");

iTunesMediaCount = [[everything items] count];

I don’t know if there’s a published API for getting the number of apps. There are solutions for jailbroken devices, but I don’t know about the rest of us.

You didn’t ask about this, but if you want available RAM (not flash storage, but memory available for apps), you can get it via:

#import <mach/mach.h>
#import <mach/mach_host.h>

- (void)determineMemoryUsage
{
    mach_port_t host_port;
    mach_msg_type_number_t host_size;
    vm_size_t pagesize;

    host_port = mach_host_self();
    host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
    host_page_size(host_port, &pagesize);        

    vm_statistics_data_t vm_stat;

    if (host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size) != KERN_SUCCESS)
        NSLog(@"Failed to fetch vm statistics");

    /* Stats in bytes */ 
    natural_t mem_used = (vm_stat.active_count +
                          vm_stat.inactive_count +
                          vm_stat.wire_count) * pagesize;
    natural_t mem_free = vm_stat.free_count * pagesize;
    natural_t mem_total = mem_used + mem_free;

    // do whatever you want with mem_used, mem_free, and mem_total
}