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2014/10/15 ¤U¤È 10:12:51
iphone Programming Glossary: predicateHow to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll iPhone app. I'm not sure how to proceed. The app already has an NSFetchedResultsController with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change.. TableView If I use the same one is it as simple as clearing the FRC cache and then changing the predicate in the handleSearchForTerm searchString method Does the predicate have to contain the initial predicate.. FRC cache and then changing the predicate in the handleSearchForTerm searchString method Does the predicate have to contain the initial predicate as well as the search terms or does it remember that it used a..
Getting a list of files in a directory with a glob http://stackoverflow.com/questions/499673/getting-a-list-of-files-in-a-directory-with-a-glob NSArray dirContents fm contentsOfDirectoryAtPath bundleRoot error nil NSPredicate fltr NSPredicate predicateWithFormat @ self ENDSWITH '.jpg' NSArray onlyJPGs dirContents filteredArrayUsingPredicate fltr If you.. @ options NSDirectoryEnumerationSkipsHiddenFiles error nil NSPredicate fltr NSPredicate predicateWithFormat @ pathExtension '.jpg' NSArray onlyJPGs directoryContents filteredArrayUsingPredicate predicate..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes this may crash the whole process. It's possible to narrow the fetched entities down with a Filter predicate . Back to our two mapping models. We create the first mapping model like this 1. New File Resource Mapping..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll I'm trying to implement search code in my CoreData based iPhone app. I'm not sure how to proceed. The app already has an NSFetchedResultsController with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples.. the matching items or can I use the same one as the primary TableView If I use the same one is it as simple as clearing the FRC cache and then changing the predicate in the handleSearchForTerm searchString method Does the predicate have to contain the initial predicate as well as the search terms or does it remember that it.. If I use the same one is it as simple as clearing the FRC cache and then changing the predicate in the handleSearchForTerm searchString method Does the predicate have to contain the initial predicate as well as the search terms or does it remember that it used a predicate to retrieve data in the first place How do I get..
Getting a list of files in a directory with a glob http://stackoverflow.com/questions/499673/getting-a-list-of-files-in-a-directory-with-a-glob bundlePath NSFileManager fm NSFileManager defaultManager NSArray dirContents fm contentsOfDirectoryAtPath bundleRoot error nil NSPredicate fltr NSPredicate predicateWithFormat @ self ENDSWITH '.jpg' NSArray onlyJPGs dirContents filteredArrayUsingPredicate fltr If you need to do it with NSURL instead it looks like this NSURL..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes only ranges of the entities. Say we got one million records this may crash the whole process. It's possible to narrow the fetched entities down with a Filter predicate . Back to our two mapping models. We create the first mapping model like this 1. New File Resource Mapping Model 2. Choose a name I chose StepOne 3. Set source..
How to correctly setup a NSPredicate for a to-many relationship when using Core Data? http://stackoverflow.com/questions/1347776/how-to-correctly-setup-a-nspredicate-for-a-to-many-relationship-when-using-core as the day property of any ExludedDay entity. I started trying NSPredicate dayIsNotExcludedPredicate NSPredicate predicateWithFormat @ ALL excludedDays.day @ today However despite what the documentation says ALL does not work and the application.. throws an exception Terminating app due to uncaught exception ˜NSInvalidArgumentException reason ˜Unsupported predicate. After posting the same question in this forum I was able to devise the following predicate with the help of various people.. reason ˜Unsupported predicate. After posting the same question in this forum I was able to devise the following predicate with the help of various people NSPredicate dayIsNotExcludedPredicate NSPredicate predicateWithFormat @ excludedDays.@count..
http://stackoverflow.com/questions/2176127/core-data-and-core-location like float latMax wantedLat 1 float latMin wantedLat 1 float lngMax wantedLng 1 float lngMin wantedLng 1 NSPredicate predicate NSPredicate predicateWithFormat @ lat f and lat f and lng f and lng f latMin latMax lngMin lngMax Though depending on how.. 1 float latMin wantedLat 1 float lngMax wantedLng 1 float lngMin wantedLng 1 NSPredicate predicate NSPredicate predicateWithFormat @ lat f and lat f and lng f and lng f latMin latMax lngMin lngMax Though depending on how much data you have and..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll in my CoreData based iPhone app. I'm not sure how to proceed. The app already has an NSFetchedResultsController with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code... one as the primary TableView If I use the same one is it as simple as clearing the FRC cache and then changing the predicate in the handleSearchForTerm searchString method Does the predicate have to contain the initial predicate as well as the search.. as clearing the FRC cache and then changing the predicate in the handleSearchForTerm searchString method Does the predicate have to contain the initial predicate as well as the search terms or does it remember that it used a predicate to retrieve..
Getting a list of files in a directory with a glob http://stackoverflow.com/questions/499673/getting-a-list-of-files-in-a-directory-with-a-glob defaultManager NSArray dirContents fm contentsOfDirectoryAtPath bundleRoot error nil NSPredicate fltr NSPredicate predicateWithFormat @ self ENDSWITH '.jpg' NSArray onlyJPGs dirContents filteredArrayUsingPredicate fltr If you need to do it with.. includingPropertiesForKeys @ options NSDirectoryEnumerationSkipsHiddenFiles error nil NSPredicate fltr NSPredicate predicateWithFormat @ pathExtension '.jpg' NSArray onlyJPGs directoryContents filteredArrayUsingPredicate predicate share improve..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes one million records this may crash the whole process. It's possible to narrow the fetched entities down with a Filter predicate . Back to our two mapping models. We create the first mapping model like this 1. New File Resource Mapping Model 2. Choose..
Coredata Error “data: <fault>” http://stackoverflow.com/questions/7304257/coredata-error-data-fault alloc init request.entity NSEntityDescription entityForName @ Cave inManagedObjectContext self.context request.predicate NSPredicate predicateWithFormat @ latitude 0 AND longitude 0 NSError error NSLog @ @ self.context executeFetchRequest request.. NSEntityDescription entityForName @ Cave inManagedObjectContext self.context request.predicate NSPredicate predicateWithFormat @ latitude 0 AND longitude 0 NSError error NSLog @ @ self.context executeFetchRequest request error error NSLog.. error NSLog @ @ error localizedDescription CoreData should have 9 matching objects and it finds the 9 objects. So the predicate should work but I get this in the console 2011 09 05 07 41 42.267 CaveConditions 6930 11903 NSManagedObject 0x7368060 entity..
Correct Singleton Pattern Objective C (iOS)? http://stackoverflow.com/questions/7598820/correct-singleton-pattern-objective-c-ios NSUIntegerMax That's soooo non zero MySingleton sharedInstance static MySingleton instance nil static dispatch_once_t predicate dispatch_once predicate ^ call to super avoids a deadlock with the above allocWithZone instance super allocWithZone nil.. non zero MySingleton sharedInstance static MySingleton instance nil static dispatch_once_t predicate dispatch_once predicate ^ call to super avoids a deadlock with the above allocWithZone instance super allocWithZone nil init return instance MARK..
Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC? http://stackoverflow.com/questions/9119042/why-does-apple-recommend-to-use-dispatch-once-for-implementing-the-singleton-pat for using dispatch_once in the shared instance accessor of a singleton under ARC MyClass sharedInstance Static local predicate must be initialized to 0 static MyClass sharedInstance nil static dispatch_once_t onceToken 0 dispatch_once onceToken ^..
Fetched Properties - Predicate http://stackoverflow.com/questions/10951844/fetched-properties-predicate Properties Predicate I have a question about using fetched properties inside a NSPredicate see below 'My question' . It's not about the predicate.. Properties Predicate I have a question about using fetched properties inside a NSPredicate see below 'My question' . It's not about the predicate to get the fetched property. For clarification and for others which.. PreloadedData 'Favorite' should contain UserData. The Favorite Tag is just an example it may also be User made Notes Predicate for Note available or if the book is rented to somebody else... In my xcdatamodeld Xcode Editor I have added two Configurations..
How to correctly setup a NSPredicate for a to-many relationship when using Core Data? http://stackoverflow.com/questions/1347776/how-to-correctly-setup-a-nspredicate-for-a-to-many-relationship-when-using-core to correctly setup a NSPredicate for a to many relationship when using Core Data I have a Core Data model in which a Task entity includes an optional to.. to make sure that the specified day does not appear as the day property of any ExludedDay entity. I started trying NSPredicate dayIsNotExcludedPredicate NSPredicate predicateWithFormat @ ALL excludedDays.day @ today However despite what the documentation.. day does not appear as the day property of any ExludedDay entity. I started trying NSPredicate dayIsNotExcludedPredicate NSPredicate predicateWithFormat @ ALL excludedDays.day @ today However despite what the documentation says ALL does not..
Core data many-to-many relationship - Predicate question http://stackoverflow.com/questions/2328585/core-data-many-to-many-relationship-predicate-question data many to many relationship Predicate question In my Core Data model I have two entities List and Patient. List has an attribute called 'name'. A List can have.. Patient called 'lists' that has a to many relationship to List. What I'm struggling to figure out is how to create a Predicate that will select all Patients that belong to a particular List name. How would I go about this I have never used relationships..
Crash using Aggregate Operation: “ALL” in a Core Data iOS Application http://stackoverflow.com/questions/5922139/crash-using-aggregate-operation-all-in-a-core-data-ios-application the following predicate. Note the uid field is a string field that I used to uniquely identify contact entities NSPredicate predicateWithFormat @ ALL contacts.uid @ contactUId According to Apple's Predicate Programming Guide the ALL aggregate operation.. identify contact entities NSPredicate predicateWithFormat @ ALL contacts.uid @ contactUId According to Apple's Predicate Programming Guide the ALL aggregate operation is valid but I get the following exception indicating that this is an unsupported.. belong to using this predicate so it appears that I have all of the relationships and fields defined properly. NSPredicate predicateWithFormat @ ANY contacts.uid @ contactUId The exception is thrown when constructing the predicate and not when..
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