iOS Getting Contents of Directory

[duny]

Can someone show me the code for the
.h and .m ViewControl to obtain the files in a directory.

 

[kainjow]

No need for a complete class to do this. Look at NSFileManager.

 

[GregInAZ]

Look at directoryContentsAtPath, which is part of NSFileManager. This will return an array.

 

[duny]

K I read it as always, but i am still lost ing the sause, i read the NSDirectoryEnumerator, it's exactly what i am looking for, I follow the text but nothing, it says i need NSFileManager.h would that be the same as i ManagerViewController.h i have created. I hav a Table View Set up in one of my .XIB files, i want to be able to view the directory.

No matter what i play with i still get errors. Can some one just show me barney style how this is done.

 

[PhoneyDeveloper]

	NSDirectoryEnumerator*	e = [[NSFileManager defaultManager] enumeratorAtPath:MMDocumentsFolder()];
	
	// Ignore any files except XYZ.jpg
	for (NSString*	file in e)
	{
		if (NSOrderedSame == [[file pathExtension] caseInsensitiveCompare:@"jpg"])
		{
			// Do something with file.jpg
		}
		else
		if ([[[e fileAttributes] fileType] isEqualToString:NSFileTypeDirectory])
		{
			// Ignore any subdirectories
			[e skipDescendents];
		}
	}

 

[duny]

Where will this go, in the .h. or the .m

 

[PhoneyDeveloper]

It's source code. It goes in the method that you're writing that wants to scan a directory. Nothing needs to go in the .h file.

 

[duny]

Here is what i got.

untitled.m

- (void)viewWillAppear{
	NSString *file;
	NSString *docsDir = [NSHomeDirectory() stringByAppendingPathComponent:  @"Documents"];
	NSDirectoryEnumerator *dirEnum =
    [[NSFileManager defaultManager] enumeratorAtPath:docsDir];
	
	while (file = [dirEnum nextObject]) {
		if ([[file pathExtension] isEqualToString: @"doc"]) {
			[self scanDocument: [docsDir stringByAppendingPathComponent:file]];
		}
	}
}
@end

And Untitled.h

@interface ManageViewController : UITableViewController {
		
}

@end

The error i get when i compile is
warning "ManageViewCpntroller" may not reposnd to '-scanDocument'

 

[PhoneyDeveloper]

Of course it may not respond. You didn't implement any such method.

Let me suggest that you spend some time doing tutorials. Perhaps buy a Cocoa book like the Hillegas book and run through the examples in that book or an iPhone dev book when they become available.

 

[duny]

Cant you just help me out. The iphone dev book doesn't come out till January.

 

[robotspacer]

You're calling a method that you haven't created yet, so helping you out would basically amount to writing your app for you!

I think you definitely need to spend some time learning the basics of Objective-C and Cocoa. The aforementioned book by Aaron Hillegass is a great place to start: http://www.amazon.com/Cocoa-Programming-Mac-OS-3rd/dp/0321503619/

So is Cocoa Dev Central:
http://cocoadevcentral.com

Both of these deal with specifically Mac software development, so not everything will apply, but the basics (and even some of the more complex stuff) are very very similar.

I also highly recommend looking at the various sample projects Apple has posted at http://developer.apple.com

 

[firewood]

Hillegass's new book is already out and will help you understand some of the basic concepts you are missing. Maybe a C primer if that's over your head. Also, read as much of the Cocoa ond Objective C documentation on the Apple site as you can. Otherwise it's too much like explaining how to cook fettucini to someone who hasn't figured out how to boil water yet.

 

[duny]

Thanks guys just bought the book.