After many years of using procedural programming languages, I am trying to
learn Cocoa. Today I am reading the Apple document "The Objective-C Programming
Language" dated 2009-10-19. On page 46 I read the following:
This is an example of what not to do:
+ (Rectangle *)rectangleOfColor:(NSColor *
ause validation errors. Can
anyone help?
Lynn Barton
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On Mar 18, 2010, at 7:51 AM, Sean McBride wrote:
> On Wed, 17 Mar 2010 21:05:06 -0700, Lynn Barton said:
>
>> the app quits, I get a "multiple validation errors occured" message. The
>> console has no error messages.
>
> Stick this in your app dele
to
write code to examine all of the objects one by one? I have searched the
documentation without finding such a method.
Lynn Barton
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On Apr 27, 2010, at 8:06 PM, Roland King wrote:
> Graham Cox wrote:
>> On 28/04/2010, at 12:37 PM, Lynn Barton wrote:
>>> Newbie question: Consider an array of dictionary objects, all of the same
>>> class. One of the ivars of that class is an NSString which is un
immediately (without
any user action) that the content has finished loading? I can't use
awakeFromNib, as the content has not yet been loaded when that method is called.
--Lynn
On Apr 27, 2010, at 8:06 PM, Roland King wrote:
> Graham Cox wrote:
>> On 28/04/2010, at 12:37 PM, Lyn
I have a document based application. The document window has an NSTableView
with six columns. Four columns are bound to four text properties of an entity
in my model; one column is bound to a decimal property, and one column has
check boxes bound to a boolean property. When I run the application
; reload the data?
>
>
> On Mar 20, 2011, at 8:44 PM, Lynn Barton wrote:
>
>> I have a document based application. The document window has an NSTableView
>> with six columns. Four columns are bound to four text properties of an
>> entity in my model; one colu
Can someone point me to an example or tutorial that shows how to get the value
of a to-many relationship attribute of a Core Data entity? My application is
simple and comparable to the Departments and Employees example in Apple's
documents. When I select a "department" object I have no trouble a
Thanks, that helps. I need to study the Core Data Programming Guide again, and
this time pay more attention to the FAQs.
Lynn
On 2011 Apr 11, at 09:54, Lynn Barton wrote:
>> Can someone point me to an example or tutorial that shows how to get the
>> value of a to-many relationship
Why does my Core Data app give me a validation error message, when quitting the
app, if the following code is used? I am importing some legacy data to set 5
string attributes of an object, but using this code to set the one BOOL
attribute. In my model, myBooleanAttribute has a default value of N
r];
>
> Steven Degutis
> Software Engineer
> Big Nerd Ranch, Inc.
> http://www.bignerdranch.com/
>
> On Tue, Feb 16, 2010 at 5:35 PM, Lynn Barton wrote:
> Why does my Core Data app give me a validation error message, when quitting
> the app, if the following code is used?
Buck and Yacktman's book Cocoa Design Patterns says on page 208, "Any instance
variable with type id and a name that doesn't start with an underscore
character is automatically considered an outlet."
Lynn
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ges the selected item in the popup menu, will that be
automatically reflected in the value of myIntProperty?
(4) Why does the error persist after I reverse the changes to the tableview?
(5) Am I not providing the menu's array of strings in a correct way?
This has me stumped, so any help will
not pursue.
If anyone wants to know more, just send me a private email.
Lynn Barton
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I am programming a Core Data application, and testing it from time to
time by importing a small amount of data. This was going well for a
while, but after the latest changes to the data model the application
produces the error message "The managed object model version used to
open the persi
On Jun 18, 2009, at 6:27 PM, Kyle Sluder wrote:
On Thu, Jun 18, 2009 at 6:19 PM, Lynn Barton
wrote:
I don't think that I saved any data while testing the app, but
perhaps I
did. Please help me rescue this application.
This message means that the managed object model changed. R
, the
boilerplate code puts it in a folder inside the Application Support
folder.)
Thanks. I found the persistent store and deleted it. That of course
removed the error message. Now I can continue developing my app.
Lynn Barton
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-(void)mouseDown:
(NSEvent *)theEvent method in the subclass. That allowed me to get and
process the event, but the image did not appear in the view. Can
anyone help?
Lynn Barton
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Please do not
and never change. I found no documentation for how to put a
popup menu into a tableview in IB or programmatically. My Mac OS is
Leopard, and my Xcode is version 3.1.2. TIA.
Lynn Barton
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Please do
I am trying to build a list of files found on my hard disk that pass a
certain filter (predicate). Mostly my code works, but I want to get the
modification date and the type code of each file. I am getting the date OK,
but not the type code, which should be ³TEXT² for text files and might be
³WBBN²
The replies to my original question are appreciated, but they do not answer
the question. Once my NSFileManager object has found a file of interest, why
can I get the modification date with the key NSFileModificationDate (using
objectForKey or valueForKey doesn't matter) but I can't get the OSType
Thanks, Quincy Morris, for pointing out that I needed to get the value of
the NSNumber returned by the objectForKey method. It all works now, except
that I will use unsignedLongValue, not intValue.
Lynn Barton
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Being new to Cocoa and Xcode, I get a lot of error and warning messages. Is
there a document that explains them in some detail?
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C
By a coincidence, I am working right now on an application using a
NSTableView.
Did your controller call [ directoryTable reloadData] to let the NSTableView
that it needs to update the table?
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