Mac Forum / Programming / Mac Programming / July 2006

Hello NG
In my app I what to switch from NSArchiver to CoreData.
I have some problems in understanding how to use it. I'm unsure about
the way to use it. Shall I use it like a database or is it more like a

Hello NG,
I can't find how to define relations by code. How and where is that
done ? I guess in the NSManagedObjectModel() function ?
Thank you for your time and help

Pardon my XCode newbie-ness but Codewarrior always handled this one
perfectly so perhaps I don't have something set up right.  I'm moving a
project from CW to XCode.  (The importer sucks, IMHO).  The problem is
that there are dozens of separate resource files and for some reason

For whatever reason my PPC Powerbook has only PPC frameworks in
/System/Library. Irritating but I copied universal frameworks
from an Intel; now if I can just convince XCode to link against
these frameworks in ~/Library/Frameworks, it should work fine,

I've made a little webpage that describes how to make an app react to
changes in text field focus.  Since I'm not exactly a Cocoa pro or
anything, if anyone wants to look at it and suggest improvements -- or
alert me of blatent errors -- I'd be most appreciative.  Thanks!

When I close my application using the red cross icon on the top left
corner of my application. the application does not opens when I again
click on the application icon in the dock.
Can some one tell me why?.

Another beginner's question. I'm trying to work out the details of how
to save (archive?) my document. Looking at the Sketch example from
Apple, I see that the individual objects are stored into a dictionary
using various calls, like this:

I have a NSMatrix containing images(NSImageCell).  In that, i need to
select multiple images by dragging mouse over it. Is there a way to do
so?
Thank you

I have an NSTextField and I want to put a link in it so when I click
it, it opens the link in the default browser.
I know how to make NSURLs and how to open the default browser (if a
button or something is clicked) but I am not sure how I am supposed to

I guess I'm totally out to lunch, here, but I'm trying to figure out
how to have my program draw into the alpha channel. I'm using an
offscreen NSImage, into which I draw various bits. Then I use
compositeToPoint to copy it to the main window NSView. I want to be

What is the recommended way of scanning over a large text file in Cocoa
if the file is too large to be read al at once like with NSString
initWithContentsOfFile type solutions.
I know there is also NSFileHandle with lower level functionality but I

I'm writing a universal binary which does a lot of reading/writing data
to hard disk. As the data file needs to be windows compatable it is
little endian and so I swap bytes when running on PPC.
But a bool seems to be 4 bytes on my PPC G4 but 1 byte on my Intel iMac,

I am working on a project trying to setup a telemetry system on a Mac
OS X.  What I am currently trying to accomplish is reading a continuous
stream of data from the USB port and have it display on the console.  I
am currently using Apple's sample code in order to access a USB ...

I am trying to do file association with my application. I found some
thread related to the same.
http://groups.google.co.in/group/comp.sys.mac.oop ...

I have a Unix shell script that needs to know its own full directory
path. I can't seem to find out how to do this. (man pages aren't much
help if you don't know the command name.) Can anyone point me in the
right direction?