Save arrays in folders - iphone

Question

I want to create different folders for each user's account. There are images of user's that are need to be stored in their folder. How can i achieve that i am getting no idea.Can anyone help me.
Thanks in advance.

Answer 1

Create directory in your app like this:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *folderPath = [documentsDirectory stringByAppendingPathComponent:#"UniqueUserAccount"];
if (![[NSFileManager defaultManager] fileExistsAtPath:folderPath])
[[NSFileManager defaultManager] createDirectoryAtPath:folderPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder
Now saving NSMutableArray refer read-and-write-array-dictionary-and-other-collections-to-files link.
folderPath = [folderPath stringByAppendingPathComponent:#"array.out"];
[yourArray writeToFile:folderPath atomically:YES];
Read array like this:
NSArray *arrayFromFile = [NSArray arrayWithContentsOfFile:folderPath];
NSLog(#"%#",arrayFromFile);
EDIT : To save image in user account folder from array of images
for(int i = 0;i < [arrImages count];i++)
{
folderPath = [folderPath stringByAppendingPathComponent:[NSString stringWithFormat:#"Images%d",i]]; //here folder Path with Image file
//Our goal is to create UIImage into NSData if u have image in bundle then take like this:
NSMutableString *imgPath;
imgPath=[[NSMutableString alloc] initWithString: [[NSBundle mainBundle] resourcePath]]; //get bundle path
[imgPath stringByAppendingPathComponent:[arrImages objectAtIndex:i]]; //get image from bundle to write
NSData *imageData = [NSData dataWithContentsOfFile:imgPath]; //create nsdata of image
//if u have UIImage
NSData *imageData = UIImagePNGRepresentation([arrImages objectAtIndex:i]) //image reference here to convert into data
[imageData writeToFile:folderPath atomically:YES]; //write here
}

Answer 2

you can create directory in your app by:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *newFolder = [(NSString*)[paths objectAtIndex:0] stringByAppendingPathComponent:#"uniqueIdentifierForAccount"];
if (![[NSFileManager defaultManager] fileExistsAtPath:newFolder]) {
[[NSFileManager defaultManager] createDirectoryAtPath:newFolder withIntermediateDirectories:YES attributes:nil error:nil];
}

Answer 3

It sounds to me that rather than needing actual folders, you really just need to store an array connected to a name. I would advise using the NSUserDefaults. You can achieve this functionality like this:
//instantiate the NSUserDefaults
NSUserDefaults *storage = [NSUserDefaults standardUserDefaults];
NSArray *userArray;
NSString *username;
//Then to store:
[storage setObject:userArray forKey:username];
//and to recall:
userArray = [storage objectForKey:username];