lengthOfBytesUsingEncoding not correct
This program: NSString *s = @"หัวหิน"; NSUInteger l3 = [ s lengthOfBytesUsingEncoding: NSUTF16StringEncoding ]; NSLog(@"%s NSUTF16StringEncoding length %lu", __FUNCTION__, l3); NSData *d9 = [ s dataUsingEncoding: NSUTF16StringEncoding ]; NSLog(@"%s NSUTF16StringEncoding data %lu %@", __FUNCTION__, [d9 length], d9); prints: NSUTF16StringEncoding length 12 NSUTF16StringEncoding data 14 Why is the number of bytes first 12, then 14? (NSUTF16StringEncoding data has 2 leading byte order bytes - but why does lengthOfBytesUsingEncoding not take this into it's count?) OS X 10.8.2, Xcode 4.6 Gerriet. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: lengthOfBytesUsingEncoding not correct
On 2/15/13 9:13 AM, Gerriet M. Denkmann wrote: This program: NSString *s = @"หัวหิน"; NSUInteger l3 = [ s lengthOfBytesUsingEncoding: NSUTF16StringEncoding ]; NSLog(@"%s NSUTF16StringEncoding length %lu", __FUNCTION__, l3); NSData *d9 = [ s dataUsingEncoding: NSUTF16StringEncoding ]; NSLog(@"%s NSUTF16StringEncoding data %lu %@", __FUNCTION__, [d9 length], d9); prints: NSUTF16StringEncoding length 12 NSUTF16StringEncoding data 14 Why is the number of bytes first 12, then 14? (NSUTF16StringEncoding data has 2 leading byte order bytes - but why does lengthOfBytesUsingEncoding not take this into it's count?) The data includes the Byte Order Mark (BOM) 0xfffe (see http://en.wikipedia.org/wiki/Byte_order_mark). Documentation on -dataUsingEncoding:allowLossyConversion: explains that it is doing that. Regards Markus -- __ Markus Spoettl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Dynamic Object, How to implement B-Tree in Objective-c, Archiving on each B-Tree node
Hello How to create dynamic object based on user request and then how to insert it in a B-Tree and then how to archive/unarchive this tree. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
How to use NSManagedObjectContext, NSManagedObjectModel, NSEntityDescription, NSManagedObject
Hello I want to use these classes in my app but I don't want to use it in Core Data. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Recursive file copy with good progress data?
On 15 Feb 2013, at 05:22, Graham Cox wrote: > > On 15/02/2013, at 1:55 PM, Jim Zajkowski wrote: > >> s there anything that provides the level of progress that FSCopyObjectAsync >> does but gives the callback more control like copyfile() does? > > > You could look into NSFileManager's -copyItemAtURL:toURL:error: method which, > in conjunction with a delegate implementing appropriate methods, gives you > both progress feedback as well as a mechanism for error recovery. Not sure > what performance will be like though. The glaring flaw in NSFileManager for this is it can't give progress callbacks for individual files; something that becomes quite important when copying a GB of data! It might be interesting to use NSFileManager's directory enumeration features to drive the copying of individual files though. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Dynamic Object, How to implement B-Tree in Objective-c, Archiving on each B-Tree node
On 15/02/2013, at 8:01 PM, Christ Levesque wrote: > How to create dynamic object based on user request and then how to insert it > in a B-Tree and then how to archive/unarchive this tree. How indeed? How about studying CS for a few years, getting a degree, working in industry for a further twenty or so, writing millions of lines of code to gain experience, and then perhaps you'll at least know how to frame the question smartly. You seem to expect those of us who have done these things to help you skip straight to the answer. Why would we do that? We did the hard yards, bud, so you'll have to as well. In the meantime, this is a great resource: http://www.catb.org/esr/faqs/smart-questions.html --Graham ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How to use NSManagedObjectContext, NSManagedObjectModel, NSEntityDescription, NSManagedObject
> NSManagedObjectContext, NSManagedObjectModel, NSEntityDescription, > NSManagedObject > > I want to use these classes in my app but I don't want to use it in Core Data. These classes *are* Core Data; I'm afraid you're not making much sense. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Observing changes user did in Print&Scan tab in System Preferences.
Hi all, How can i observe changes( like renaming printer, set another default printer, delete printer, add printer) user did in Print&Scan tab in System Preferences? Thanks. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Binding a NSArrayController to a NSPopupButtonn & NSTextField
What I want to accomplish seems like it should be fairly straightforward. I
have placed a sample project at
https://github.com/ericgorr/arraycontrollerbindings.
I have a NSArrayController filled with an array of NSDictionaries.
[[self controller] addObject:@{ @"name" : @"itemA", @"part" : @"partA" }];
[[self controller] addObject:@{ @"name" : @"itemB", @"part" : @"partB" }];
[[self controller] addObject:@{ @"name" : @"itemC", @"part" : @"partC" }];
I am populating a NSPopupButton with the items in this array based on the
'name' key. This is easily accomplished with the following bindings.
Content Array binding -
bound to: Array Controller
controller key: arrangedObjects
Content Values binding
bound to: array controller
controller key: arrangedObjects
model key path: name
I would then like to populate a NSTextField with the text in the 'part' key
based on the current selection of the NSPopupButton. I have setup the following
binding:
Value binding
bound to: array controller
controller key: selection
model key path: part
With these bindings alone, the text field does display 'partC'.
However, if I change the value of the NSPopupMenu, what the text field shows
does not change.
I thought this would simply be a matter of setting up the 'Selected Object'
binding on the NSPopupButton with the controller key 'selection', but that
isn't working. I end up with the proxy object in my menu for some strange
reason (providing the reason why would be a bonus).
What am I missing to make this work?
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Re: How to use NSManagedObjectContext, NSManagedObjectModel, NSEntityDescription, NSManagedObject
On Feb 15, 2013, at 2:06 AM, Christ Levesque wrote: > I want to use these classes in my app but I don't want to use it in Core Data. You can use all of these *except* NSManagedObjectContext for your own purposes. I know because I have a significant project where I do exactly that. NSManagedObjectContext is basically the heart of Core Data, and doesn't extend well. Its inner workings are opaque and undocumented. If what you are looking for are the benefits of Core Data but with your own database back-end, you pretty much will have to write your own database coordination methods, as well as change tracking and undo management0--essentially everything that NSManagedObjectContext does. HTH, Keary Suska Esoteritech, Inc. "Demystifying technology for your home or business" ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Binding a NSArrayController to a NSPopupButtonn & NSTextField
On Feb 15, 2013, at 5:41 AM, Eric Gorr wrote:
> I have a NSArrayController filled with an array of NSDictionaries.
>
> [[self controller] addObject:@{ @"name" : @"itemA", @"part" : @"partA" }];
> [[self controller] addObject:@{ @"name" : @"itemB", @"part" : @"partB" }];
> [[self controller] addObject:@{ @"name" : @"itemC", @"part" : @"partC" }];
>
> I am populating a NSPopupButton with the items in this array based on the
> 'name' key. This is easily accomplished with the following bindings.
>
> Content Array binding -
> bound to: Array Controller
> controller key: arrangedObjects
>
> Content Values binding
> bound to: array controller
> controller key: arrangedObjects
> model key path: name
>
> I would then like to populate a NSTextField with the text in the 'part' key
> based on the current selection of the NSPopupButton. I have setup the
> following binding:
>
> Value binding
> bound to: array controller
> controller key: selection
> model key path: part
>
> With these bindings alone, the text field does display 'partC'.
>
> However, if I change the value of the NSPopupMenu, what the text field shows
> does not change.
It is useful to note that even though an object will bind to an
NSArrayController, it does not mean that it will employ the controller's
selection semantics. NSPopupButton is one of them, I believe. The "proper" way
to do this is bind the NSPopupButton's selectedObject/Value to a controller
that maintains the value (*not* the array controller), and then bind the
NSTextField to that other controller. You may be able to use an
NSObjectController in the xib to act as the "proxy" for the value, however
kludgey.
HTH,
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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[solved] Re: NSImage leaks open file in 10.8.2?
Thanks a lot for your comments. I have tried to set setCacheMode:NSImageCacheNever, but that still left the file open. But I have changed my code to use this now: NSImage *result = [[NSImage alloc] initByReferencingFile:[[NSBundle mainBundle] pathForResource:[theName stringByDeletingPathExtension] ofType:@"png"]]; [result autorelease]; And this works!!! No more image files left open. That is definitely a bug in Mac OS X 10.8.2, I can't believe this is intended behavior… Yours, > while testing the latest version of my software in 10.8.2, I noticed that > there are a lot of open files, more than in 10.6.8. > > I tracked it down to an animation I use, and the png files I load for that. > > In Mac OS X 10.6.8, it works fine, and closes the image files after use. But > in 10.8.2, it keeps every single one of them open. > > Here is the code I use: > > NSImage *nextImage = [NSImage > imageNamed:@"Animator1.png"]; > if (nextImage != NULL) > [myImageView setImage:nextImage]; > > myImageView is a regular NSImageView. The app is non GC, and non ARC. > > Is that a new "feature" of Mountain Lion? > > The problem is that my software deals with a LOT of files, and so it would be > nice to keep the number of open files as small as possible at any time. > > And ideas? Norbert M. Doerner ndoer...@wfs-apps.de CEO, West-Forest-Systems In der Trift 13 56459 Langenhahn, Germany Fon: +49 (2663) 91 70 128 (Central European Time Zone...) Fax: +49 (2663) 91 70 126 AIM (iChat), Skype: cdfinderceo Twitter: http://www.twitter.com/neofinder Facebook: http://www.facebook.com/NeoFinder --- NeoFinder - The Search Is Over! http://www.neofinder.de/ Catalog and organize your photos, music, videos, disks, data, anything... NEW: NeoFinder 6.0.1 for Mac (was CDFinder) --- ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: [solved] Re: NSImage leaks open file in 10.8.2?
On Fri, Feb 15, 2013, at 09:30 AM, norbert wrote: > Thanks a lot for your comments. I have tried to set > setCacheMode:NSImageCacheNever, but that still left the file open. > > But I have changed my code to use this now: > > NSImage *result = [[NSImage alloc] > initByReferencingFile:[[NSBundle mainBundle] pathForResource:[theName > stringByDeletingPathExtension] ofType:@"png"]]; > [result autorelease]; This will not deal with @2x images correctly, though that might not be an issue for you. > > And this works!!! No more image files left open. That is definitely a bug > in Mac OS X 10.8.2, I can't believe this is intended behavior… If you're certain of this, you should definitely file a Radar with a small demo project that reproduces the issue. It would also be nice if you could share that demo project with us. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Custom control with 4 vertical sliders
What's the easiest way to create a custom control that contains a matrix of 4 custom vertical sliders, like a mini graphic EQ? The sliders will not draw the slot, only the knob. First I started with a subclass of NSMatrix and a subclass of NSCell. No matter what I've tried, the cells always end up drawing at the wrong size, as if they were the cell for a simple text matrix, about 100 pixels wide and the height of a regular size text label. I create it thusly: MyMatrix* blView = [[MyMatrix alloc] initWithFrame:NSMakeRect(100, 100, 200, 80) mode:NSTrackModeMatrix cellClass:[MyCell class] numberOfRows:1 numberOfColumns:4]; I've tried overriding all sorts of methods in the 2 subclasses; cellSize, cellFrameAtRow:column, even returning a cellSize of 1,1 as suggested in the docs for cells that aren't text or image cells. -- Steve Mills office: 952-818-3871 home: 952-401-6255 cell: 612-803-6157 ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Custom control with 4 vertical sliders
On Feb 15, 2013, at 13:35:38, Steve Mills wrote: > What's the easiest way to create a custom control that contains a matrix of 4 > custom vertical sliders, like a mini graphic EQ? The sliders will not draw > the slot, only the knob. First I started with a subclass of NSMatrix and a > subclass of NSCell. No matter what I've tried, the cells always end up > drawing at the wrong size, as if they were the cell for a simple text matrix, > about 100 pixels wide and the height of a regular size text label. I create > it thusly: > > MyMatrix* blView = [[MyMatrix alloc] > initWithFrame:NSMakeRect(100, 100, 200, 80) mode:NSTrackModeMatrix > cellClass:[MyCell class] numberOfRows:1 numberOfColumns:4]; > > I've tried overriding all sorts of methods in the 2 subclasses; cellSize, > cellFrameAtRow:column, even returning a cellSize of 1,1 as suggested > in the docs for cells that aren't text or image cells. Addendum: If any of the sliders is dragged past the top of bottom of the containing control, the containing control's bounds will be expanded live in that direction, thereby keeping the mouse within the containing control. I'm starting to think that doing with this a matrix of cells won't be the best way to do this, but rather just create a custom control and tracks the 4 "sliders" internally. Thoughts? -- Steve Mills office: 952-818-3871 home: 952-401-6255 cell: 612-803-6157 ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS Document Interaction Technology
This was an interesting problem, well to me anyway. I copied CFBundleDocumentTypes and UTExportedTypeDeclarations from an OSX project to an iOS project. The OSX app is recognized as the app to open files of types specified in these keys so I assumed the key values were constructed properly. Well, the UTExportedTypeDeclarations was malformed and it is the key that iOS apparently looks to for registering documents. Which leads me to believe that OSX does not use this key but uses CFBundleDocumentTypes OR OSX overlooks minimal malformations and interprets UTExportedTypeDeclarations regardless. So, which is it … if anyone can answer. BTW the UTExportedTypeDeclarations malformation was that the array of dictionaries was in an array. Removing the outer array tags made it all good. -koko On Feb 14, 2013, at 12:33 PM, David E Blanton wrote: > > On Feb 14, 2013, at 12:12 PM, Damian Carrillo wrote: > >> You may be missing UTExportedTypeDeclarations. > > I have both CFBundleDocumentTypes and UTExportedTypeDeclarations in my > info.plist. > > UTExportedTypeDeclarations has a UTTypeConformsTo key for each item in the > LSItemContentTypes array. > > > -koko ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
OS X Collection Views videos?
Are there any WWDC videos covering Cocoa Collection Views (not iOS Collection Views)? I just looked through the titles online, but it's hard to discern, and doesn't look like there are any expressly dedicated to the topic. -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: OS X Collection Views videos?
Well, there are session 205 & 219 of WWDC2012, but I think both are exclusively about IOS6. Might be worth fast forwarding through them, thought. Jean On 15 févr. 2013, at 22:46, Rick Mann wrote: > Are there any WWDC videos covering Cocoa Collection Views (not iOS Collection > Views)? I just looked through the titles online, but it's hard to discern, > and doesn't look like there are any expressly dedicated to the topic. > > > -- > Rick > > > > > ___ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/jean.lists%40gmail.com > > This email sent to jean.li...@gmail.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: OS X Collection Views videos?
Yeah, I saw those, but figured they wouldn't have much applicable. Maybe I'll skim through them. On Feb 15, 2013, at 13:51 , Jean Suisse wrote: > Well, there are session 205 & 219 of WWDC2012, but I think both are > exclusively about IOS6. Might be worth fast forwarding through them, thought. > Jean > > > On 15 févr. 2013, at 22:46, Rick Mann wrote: > >> Are there any WWDC videos covering Cocoa Collection Views (not iOS >> Collection Views)? I just looked through the titles online, but it's hard to >> discern, and doesn't look like there are any expressly dedicated to the >> topic. >> >> >> -- >> Rick >> >> >> >> >> ___ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/cocoa-dev/jean.lists%40gmail.com >> >> This email sent to jean.li...@gmail.com > > > ___ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/rmann%40latencyzero.com > > This email sent to rm...@latencyzero.com -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How to use NSManagedObjectContext, NSManagedObjectModel, NSEntityDescription, NSManagedObject
On Feb 15, 2013, at 8:11 AM, Keary Suska wrote: > If what you are looking for are the benefits of Core Data but with your own > database back-end, you pretty much will have to write your own database > coordination methods, as well as change tracking and undo > management0--essentially everything that NSManagedObjectContext does. Isn’t this what subclassing NSIncrementalStore is for? Creating your own back-ends for CoreData? —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Custom control with 4 vertical sliders
I sometimes find that trying to subclass existing classes such as NSCell is more trouble that it's worth, unless you really need your custom cell to be used anywhere a cell can be used, e.g. buttons, matrices, list rows, etc. If you just want a particular custom control that doesn't need that degree of reusability, subclassing NSView or NSControl is always a lot easier. In this case, if NSSlider isn't suitable, just make a custom view for your custom slider, then add it four times to another custom view that handles the "set" of sliders as needed. --Graham On 16/02/2013, at 7:30 AM, Steve Mills wrote: > On Feb 15, 2013, at 13:35:38, Steve Mills wrote: > >> What's the easiest way to create a custom control that contains a matrix of >> 4 custom vertical sliders, like a mini graphic EQ? The sliders will not draw >> the slot, only the knob. First I started with a subclass of NSMatrix and a >> subclass of NSCell. No matter what I've tried, the cells always end up >> drawing at the wrong size, as if they were the cell for a simple text >> matrix, about 100 pixels wide and the height of a regular size text label. I >> create it thusly: >> >> MyMatrix* blView = [[MyMatrix alloc] >> initWithFrame:NSMakeRect(100, 100, 200, 80) mode:NSTrackModeMatrix >> cellClass:[MyCell class] numberOfRows:1 numberOfColumns:4]; >> >> I've tried overriding all sorts of methods in the 2 subclasses; cellSize, >> cellFrameAtRow:column, even returning a cellSize of 1,1 as suggested >> in the docs for cells that aren't text or image cells. > > > Addendum: > > If any of the sliders is dragged past the top of bottom of the containing > control, the containing control's bounds will be expanded live in that > direction, thereby keeping the mouse within the containing control. I'm > starting to think that doing with this a matrix of cells won't be the best > way to do this, but rather just create a custom control and tracks the 4 > "sliders" internally. Thoughts? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How to use NSManagedObjectContext, NSManagedObjectModel, NSEntityDescription, NSManagedObject
On Feb 15, 2013, at 4:21 PM, Jens Alfke wrote: > On Feb 15, 2013, at 8:11 AM, Keary Suska wrote: > >> If what you are looking for are the benefits of Core Data but with your own >> database back-end, you pretty much will have to write your own database >> coordination methods, as well as change tracking and undo >> management0--essentially everything that NSManagedObjectContext does. > > Isn’t this what subclassing NSIncrementalStore is for? Creating your own > back-ends for CoreData? I forgot about that. I didn't take that approach for number of reasons, mostly due to when the system was mostly written and the OSes I had to target, but it will work except for issues that are the continuing limitations of Core Data, in particular ACID compliance of any kind. In my case I am working with a multi-user back-end and a complex schema so I need predictable locking and transactional semantics (especially nested transactions). Keary Suska Esoteritech, Inc. "Demystifying technology for your home or business" ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Problem with NSPersistentStore
I got a few crash reports from users that have a problem with my CoreData app.
Given the following code:
/*
Returns the persistent store coordinator for the application.
If the coordinator doesn't already exist, it is created and the application's
store added to it.
*/
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (_persistentStoreCoordinator == nil) {
NSURL *storeUrl = [NSURL fileURLWithPath:self.persistentStorePath];
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc]
initWithManagedObjectModel:[NSManagedObjectModel mergedModelFromBundles:nil]];
NSError *error = nil;
NSPersistentStore *persistentStore = [_persistentStoreCoordinator
addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl
options:nil error:&error];
NSAssert3(persistentStore != nil, @"%s at %d: Unhandled error adding
persistent store: %@", __FUNCTION__, __LINE__, [error localizedDescription]);
NSLog(@"Created persistent store '%@' at URL %@",
persistentStore, storeUrl);
}
return _persistentStoreCoordinator;
}
When the MOC tries to perform a save, an exception is generated:
Exception reason
This NSPersistentStoreCoordinator has no persistent stores. It cannot perform a
save operation.
Stacktrace
PRIMARY THREAD THREAD 0
• 0 CoreFoundation 0x356212a3 __exceptionPreprocess + 163
• 1 libobjc.A.dylib 0x3393197f objc_exception_throw + 31
• 2 CoreData 0x36f2dfef -[NSPersistentStoreCoordinator
executeRequest:withContext:error:] + 299
• 3 CoreData 0x36f862d3 -[NSManagedObjectContext save:] + 731
How can the persistent store not being existing?
-Laurent.
--
Laurent Daudelin
AIM/iChat/Skype:LaurentDaudelin
http://www.nemesys-soft.com/
Logiciels Nemesys Software
laur...@nemesys-soft.com
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