Re: How to tell if file wrapper represents package
On 14/07/2013, at 1:30 PM, Lee Ann Rucker wrote: > Haven't tried it, but [NSWorkspace isFilePackageAtPath:] looks like what you > want. If that's not sufficient, there are other things in NSWorkspace that > test files. The problem, though, is that a file wrapper doesn't have a path. -- Shane Stanley 'AppleScriptObjC Explored' ___ 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
Use of Instruments.app remedies Core Data memory issue (!?)
Hi, on and for OS 10.6.8 I am developing a single threaded Core Data (classical) music database. The model consists of eight (to-many, to-one and inversely) interlinked entities around a central "recording" entity. I am using independent managed object contexts for viewing and editing data (as well as for import and export). After saving from the editing context changes are propagated to the viewing context and the editing context is reset and torn down. The main table for data display shows most (if not all) of the data for each recording data set at one glance. The table is hooked up via array controller bindings, the controller preparing the total content of the database (currently about 38.000 data sets from a 9,3 MB MySQL store), data being filtered on the controller level for viewing. You may consider this a bad design decision, but please hold on. The problem is, that each search being executed raises the memory footprint by from 15 to as much as 250 MB or even more depending on the search. After a couple of searches memory consumption in Activity Monitor reaches GB levels, swap file sizes multiply and the system slows down. Now here comes the interesting part: While using the out-of-the box Allocations Instrument from Instruments.app, all is well. The live bytes size is at around 38 MB, rises to 45-50 MB when a search is executed, and sinks back to 38 MB. Activity Monitor at the same time shows a physical memory consumption of around 120 MB, which rises a couple of MBs according to the size of the results list and then also falls back to the standard level. I can execute dozens of searches under this setup with the memory footprint staying at a more or less constant level - which is what I would expect in the first place. When executing the identical sequence of searches with Instruments not being involved, the memory consumption increases single-mindedly and (depending on the number of hits for the query) after a couple of searches reaches the 1 GB level, ever growing from there. On the other hand, Instruments.app's memory footprint increases steadily while running but not in the same degree as my app's. Don't know if this is normal. Should be. I tried an approach adapted from code described at http://stackoverflow.com/questions/3984222/core-data-avoiding-retain-cycles-in-to-many-relationships to refault. Logging the registered objects from the viewing MO context to the console proves that the majority of objects shows the expected faults. The interesting thing is that using or not using this code does not change anything. The same goes for disabling undo for the context in question. The bottom line is: My app seems to behave very nicely while under surveillance of Instruments.app, but not on its own. Memory seems to get released while under surveillance, but not when not. Has anybody seen something like this? How could I try to debug or work around this phenomenon? The Core Data Instrument does not seem to provide anything relevant. The Leaks Instrument shows very small leaks here and there but not in my code and not remotely in the same size league. Static analysis returns no related result. Searching the web I found an interesting article about core data memory bugs on iOS http://finalize.com/2013/01/04/core-data-issues-with-memory-allocation/ but I have yet to try any of the techniques described there. I heard about Core Data memory handling being especially bad on 10.6 and much improved under 10.8, but moving to 10.8 is currently not an option. I am sure that changing my design, i.e. executing searches as real fetches from the store, or reimplementing this with a real database backend should lead to better performance, but this is a different issue and I'd rather avoid the latter. Peter ___ 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 tell if file wrapper represents package
On 14 Jul 2013, at 08:40, Shane Stanley wrote: > On 14/07/2013, at 1:30 PM, Lee Ann Rucker wrote: > >> Haven't tried it, but [NSWorkspace isFilePackageAtPath:] looks like what you >> want. If that's not sufficient, there are other things in NSWorkspace that >> test files. > > The problem, though, is that a file wrapper doesn't have a path. I think you have a couple of options, neither terribly satisfactory: A) Use the .filename property to work your way through the wrappers and build up the expected URL/path of the file. Then query that to know if it's a package. B) Grab NSFileSystemFileNumber from the package, and use it to locate the file on disk, querying that. ___ 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 tell if file wrapper represents package
On Jul 14, 2013, at 9:33 AM, Mike Abdullah wrote: > > On 14 Jul 2013, at 08:40, Shane Stanley wrote: > >> On 14/07/2013, at 1:30 PM, Lee Ann Rucker wrote: >> >>> Haven't tried it, but [NSWorkspace isFilePackageAtPath:] looks like what >>> you want. If that's not sufficient, there are other things in NSWorkspace >>> that test files. >> >> The problem, though, is that a file wrapper doesn't have a path. > > I think you have a couple of options, neither terribly satisfactory: > > A) Use the .filename property to work your way through the wrappers and build > up the expected URL/path of the file. Then query that to know if it's a > package. This sounds like the correct approach to me. Grab the file extension, call UTTypeCreatePreferredIdentifierForTag to convert it to a UTI, then call UTTypeConformsTo (or -[NSWorkspace type:conformsToType:]) to determine if the type confirms to kUTTypePackage. --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
Re: Cocoa-dev Digest, Vol 10, Issue 427
I will be out of the office Fri. July 12 ___ 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 tell if file wrapper represents package
On 14 Jul 2013, at 17:59, Kyle Sluder wrote: > On Jul 14, 2013, at 9:33 AM, Mike Abdullah wrote: > >> >> On 14 Jul 2013, at 08:40, Shane Stanley wrote: >> >>> On 14/07/2013, at 1:30 PM, Lee Ann Rucker wrote: >>> Haven't tried it, but [NSWorkspace isFilePackageAtPath:] looks like what you want. If that's not sufficient, there are other things in NSWorkspace that test files. >>> >>> The problem, though, is that a file wrapper doesn't have a path. >> >> I think you have a couple of options, neither terribly satisfactory: >> >> A) Use the .filename property to work your way through the wrappers and >> build up the expected URL/path of the file. Then query that to know if it's >> a package. > > This sounds like the correct approach to me. Grab the file extension, call > UTTypeCreatePreferredIdentifierForTag to convert it to a UTI, then call > UTTypeConformsTo (or -[NSWorkspace type:conformsToType:]) to determine if the > type confirms to kUTTypePackage. I have to admit, relying on file extension makes me uncomfortable, but maybe it's good enough. ___ 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 tell if file wrapper represents package
When it's the only information you have about the file, it's the best you can do. Would be neat if there were a “UTI override” file attribute key, though. --Kyle Sluder (Sent from the road) On Jul 14, 2013, at 12:39 PM, Mike Abdullah wrote: > > On 14 Jul 2013, at 17:59, Kyle Sluder wrote: > >> On Jul 14, 2013, at 9:33 AM, Mike Abdullah wrote: >> >>> >>> On 14 Jul 2013, at 08:40, Shane Stanley wrote: >>> On 14/07/2013, at 1:30 PM, Lee Ann Rucker wrote: > Haven't tried it, but [NSWorkspace isFilePackageAtPath:] looks like what > you want. If that's not sufficient, there are other things in NSWorkspace > that test files. The problem, though, is that a file wrapper doesn't have a path. >>> >>> I think you have a couple of options, neither terribly satisfactory: >>> >>> A) Use the .filename property to work your way through the wrappers and >>> build up the expected URL/path of the file. Then query that to know if it's >>> a package. >> >> This sounds like the correct approach to me. Grab the file extension, call >> UTTypeCreatePreferredIdentifierForTag to convert it to a UTI, then call >> UTTypeConformsTo (or -[NSWorkspace type:conformsToType:]) to determine if >> the type confirms to kUTTypePackage. > > I have to admit, relying on file extension makes me uncomfortable, but maybe > it's good enough. > ___ 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
To 'Pinch' or 'Rotate'
Having just submitted my fist iPad app I am moving on to enhancements via Gestures. In making a sample app to get a handle on gestures I added Tap, Pinch and Rotate to a View. Tap - works Pinch - works Rotate - calls Pinch … now I can understand this since pinch is two fingers down as is rotate. The Apple Simple Gesture example uses Swipe and Rrotate, no Pinch. So what is the proper approach to have Pinch and Rotate in the same view? Oh, I better answer the obligatory "What is it you really want to do?" question. Given a shape in the view I want to Pinch to resize it and Rotate to rotate it. -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
Re: To 'Pinch' or 'Rotate'
I don't have the answer to your question, however I will point out that gestures are hard to roll yourself because of "Switch Bounce". That is, with my own two finger gesture, the number of finger contacts is reported as 2,1,1,2,1,1,2,2,2,2,1,1,2 and so on. When just one finger contact is reported, which of my two fingers is contacting alternates randomly. I'll be posting some "debounce" source but first I have to factor it out from the rest of my app. Mike Crawford mdcrawf...@gmail.com Michael David Crawford mdcrawf...@gmail.com http://www.warplife.com/mdc/ Available for Mobile Development in the Portland, Oregon Metropolitan Area. On Sun, Jul 14, 2013 at 1:46 PM, koko wrote: > Having just submitted my fist iPad app I am moving on to enhancements via > Gestures. > > In making a sample app to get a handle on gestures I added Tap, Pinch and > Rotate to a View. > > Tap - works > Pinch - works > Rotate - calls Pinch … now I can understand this since pinch is two fingers > down as is rotate. > > The Apple Simple Gesture example uses Swipe and Rrotate, no Pinch. > > So what is the proper approach to have Pinch and Rotate in the same view? > > Oh, I better answer the obligatory "What is it you really want to do?" > question. > > Given a shape in the view I want to Pinch to resize it and Rotate to rotate > it. > > -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/mdcrawford%40gmail.com > > This email sent to mdcrawf...@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: How to tell if file wrapper represents package
On 15/07/2013, at 2:59 AM, Kyle Sluder wrote: > This sounds like the correct approach to me. Grab the file extension, call > UTTypeCreatePreferredIdentifierForTag to convert it to a UTI, then call > UTTypeConformsTo (or -[NSWorkspace type:conformsToType:]) to determine if the > type confirms to kUTTypePackage. Thanks -- that does the job nicely. I'm curious about how I'd use Mike's Plan B, working back from NSFileSystemFileNumber, though. -- Shane Stanley 'AppleScriptObjC Explored' ___ 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: To 'Pinch' or 'Rotate'
On Jul 14, 2013, at 4:19 PM, Michael Crawford wrote: > gestures are hard to roll yourself Hmm, I am not rolling my own … I drag them to the view in IB and them make outlets and actions. ___ 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
NSTableView don't show content
Dear All, In MAC OS 10.6.8, I use NSTableView with CALayer enabled. Everything OK. However, sometime, all NSTableView in my application doesn't show data. I can click on the row but I cannot see it. Please help me how to fix it. Thanks you very much. Best regards, ___ 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
