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• help core data tableview not reloading

  - by iphonedevcybin

  i am using core data...my table view does not reload say if i add a new row to the table. until i terminate the app and re open it...im calling reloadData in my root controller viewwillappear method... any help would be appreciated thanks in advance

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• How to access core data objects from Javascript?

  - by Eli

  How can I gain access to Core Data objects from Javascript/WebKit on Mac OS X? I've made custom subclasses of NSManagedObject for each of my tables, with accessors defined using @property/@dynamic for each attribute, but neither isSelectorExcludedFromWebScript: or isKeyExcludedFromWebScript: is called for any of them, so Javascript just stops when…

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• iPhoneOS Core Data migration: moving something from an entity into a file

  - by Tim Sullivan

  I have a scenario where I'm moving the contents of a blob stored in a core data entity into a file. I need a way to export that data during a migration, where I know the entity that's being converted and save the blob to a file, writing the location of that file into the converted entity's appropriate attribute. I can't seem to find a way to do…

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• Core Location and speed measurements

  - by Krumelur

  Does anyone know if Core Location in the iPhone OS uses anything but simple vector math to calculate speed? I've read that the GPS system can provide speed measurements that can be accurate when position is not (I believe using the Doppler shifts of the signals). I've tried and failed to see if the iPhone does this. The question is basically,…

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• Core Data Change property value when another property changes

  - by user320587

  Hi, I have a Core Data Entity which has three properties startDate, endDate and duration. All three properties are persistent properties. I would like to know how I can calculate and update the duration property whenever the value for startDate and endDate changes? BTW, I won't be able to make the duration as transient property since I have…

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• iOS Core Data migration: moving something from an entity into a file

  - by Tim Sullivan

  I have a scenario where I'm moving the contents of a blob stored in a core data entity into a file. I need a way to export that data during a migration, where I know the entity that's being converted and save the blob to a file, writing the location of that file into the converted entity's appropriate attribute. I can't seem to find a way…

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• Core Plot: x-axis labels not plotted when using scaleToFitPlots

  - by AlexR

  Problem: I can't get Core Plot (1.1) to plot automatic labels for my x-axis when using autoscaling ([plotSpace scaleToFitPlots:[graph allPlots]). What I have tried: I changed the values for the offsets and paddings, but this did not change the result. However, when turning autoscale off (not using [plotSpace scaleToFitPlots:[graph…

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• Iphone core-plot line graph

  - by Chris

  Hi is there some sample code or tutorial about how to draw a line-chart using core-plot? I can't find anything with google..

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• UIDatePicker Not storing time in core data

  - by Derek

  Hi, I am using a UIDatepicker with only "Time", I save the time in a NSDate object type, however when I try to store the Object in core data I get an error saying its not a NSDate type... *tt = [pickerTime date]; [myObject setValue:tt forKey:@"time"]; Thanks,

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• Core Animation Unwanted Text Sharpening.

  - by dave-gennel

  Whenever I add a layer for Core Animation either from the nib or programatically, the NSTextFields (labels) in my interface get messed up. Here's a screenshot from Apple's BasicCocoaAnimations example. (Look at the text fields on the left, somehow they're drawn sharper than normal) Note that if I add a layer in IB then it also gets…

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• Predicate for comparing the month component of a Core Data date attribute

  - by JK

  I have a Core Data entity which has a date attribute. I would like to write a predicate to extract all dates within a specific month, e.g. July, irrespective of year. How can this be achieved? Thanks

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• Predicate for comparing the month component of a Core Data date attribute

  - by JK

  I have a Core Data entity which has a date attribute. I would like to write a predicate to extract all dates within a specific month, e.g. July, irrespective of year. How can this be achieved? Thanks

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• Store NSArray In Core Data Sample Code?

  - by Stunner

  Ey guys, I have been searching for some sample code on how to store an NSArray in Core Data for awhile now, but haven't had any luck. Would anyone mind pointing me to some tutorial or example, or better yet write a simple sample as an answer to this question? I have read this but it doesn't show an example of how to go about…

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• Core data fetch only returns unique managed objects

  - by JK

  I execute a core data fetch which specifies a predicate as follows: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"identifier IN %@", favoritesIDs]; When there are duplicate items in the favoriteIDs array, the fetch request only returns 1 managed object. How can I ensure that more than one instance is…

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• Core Data: Mass updates possible?

  - by wgpubs

  Is it possible to do mass updates on a given entity in Core Data? Given an Person entity for example, can I do something like this: Person.update(@"set displayOrder = displayOrder + 1 where displayOrder > 5") Or is my only option to fetch all the entities needed and then loop through and update them…

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• Core Data - Best way to save a "number of items"

  - by Daniel Granger

  The user will have a static list of items to choose from. Using a Picker View they will choose one of the items and then select how many of them they want. Whats the best way to save this in core data? A Struct? struct order { NSInteger item; NSInteger numberOf; }; Or some sort of relationship?…

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• How can I make image brighter (more light as flash effect) using Core Graphics

  - by LIAL

  How can I get flash effect for images got from Camera? After I got image from camera (it shows in UIImageView) and before saving it as a file I'd like to lighten (in some cases) image by pressing Flash button. Is it possible by using Core Graphics ??

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• 32 core (each physical core) 2.2 GhZ or 12 core (6 physical cores) 3.0GHZ?

  - by Tejaswi Rana

  I am working on a multithreaded application (Forex trading app built on C#) and had the client upgrade from the 12 core 3.0GHZ machine (Intel) to a 32 core 2.2 Ghz machine (AMD). The PassMark benchmark results were significantly higher when using multicores doing Integer, Floating and other calculations…

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• Marrying Core Animation with OpenGL ES

  - by Ole Begemann

  Edit: I suppose instead of the long explanation below I might also ask: Sending -setNeedsDisplay to an instance of CAEAGLLayer does not cause the layer to redraw (i.e., -drawInContext: is not called). Instead, I get this console message: <GLLayer: 0x4d500b0>: calling -display has no effect. …

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• Core Data Model Design Question - Changing "Live" Objects also Changes Saved Objects

  - by mwt

  I'm working on my first Core Data project (on iPhone) and am really liking it. Core Data is cool stuff. I am, however, running into a design difficulty that I'm not sure how to solve, although I imagine it's a fairly common situation. It concerns the data model. For the sake of clarity, I'll use…

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• Core Plot never stops asking for data, hangs device

  - by Ben Collins

  I'm trying to set up a core plot that looks somewhat like the AAPLot example on the core-plot wiki. I have set up my plot like this: - (void)initGraph:(CPXYGraph*)graph forDays:(NSUInteger)numDays { self.cplhView.hostedLayer = graph; graph.paddingLeft = 30.0; graph.paddingTop = 20.0; …

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• inserting new relationship data in core-data

  - by michael

  My app will allow users to create a personalised list of events from a large list of events. I have a table view which simply displays these events, tapping on one of them takes the user to the event details view, which has a button "add to my events". In this detailed view I own the original event…

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• Broken Multithreading With Core Data

  - by spamguy

  This is a better-focused version of an earlier question that touches upon an entirely different subject from before. I am working on a Cocoa Core Data application with multiple threads. There is a Song and Artist; every Song has an Artist relation. There is a delegate code file not cited here; it…

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• UITableView Core Data reordering

  - by PCWiz

  I know this question has been asked before, and I took a look at the answer to this question. However, I'm still confused as to how to implement reordering with a UITableView in a Core Data project. What I know is that I need to have a "displayOrder" attribute in my Entity to track the order of…

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• UITableView Core Data reordering

  - by PCWiz

  I know this question has been asked before, and I took a look at the answer to this question. However, I'm still confused as to how to implement reordering with a UITableView in a Core Data project. What I know is that I need to have a "displayOrder" attribute in my Entity to track the order of…

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