Nsfetchedresultscontroller not updating dating before divorce in illinois


02-Jun-2016 03:26

When an NSManaged Object Context that is created with NSMain Queue Concurrency Type is accessed from the main thread without going through , it will not error or throw an exception - this was done to ease the transition between thread confinement and queue confinement.

The context actually checks to see if it’s being accessed from the main thread and if that is the case, it relaxes the rules.

When I change the product details in the server, I want my i OS app to synchronize and make the necessary changes so I implement the NSFetched Results Controller Delegate method. - (void)controller:(NSFetched Results Controller *)controller did Change Object:(id)an Object at Index Path:(NSIndex Path *)index Path for Change Type:(NSFetched Results Change Type)type new Index Path:(NSIndex Path *)new Index Path { switch(type) { case NSFetched Results Change Insert: [_current Data insert Object:an Object at Index:new Index Path.row]; [_current Data remove Object At Index:index Path.row]; [_gm Grid View insert Object At Index:new Index animated: YES]; [_gm Grid View remove Object At Index:index animated: YES]; [_gm Grid View reload Object At Index:new Index animated: YES]; [_gm Grid View reload Object At Index:index animated: YES]; [_gm Grid View reload Data]; //[self update Page Control]; break; case NSFetched Results Change Delete: [_current Data remove Object At Index:index Path.row]; [_gm Grid View remove Object At Index:index animated: YES]; //[self update Page Control]; [_gm Grid View reload Input Views]; [_gm Grid View reload Data]; break; case NSFetched Results Change Update: [_gm Grid View reload Object At Index:index animated: YES]; ////////might be irrelevant, but just trying it out [_current Data insert Object:an Object at Index:new Index Path.row]; [_current Data remove Object At Index:index Path.row]; [_gm Grid View insert Object At Index:new Index animated: YES]; [_gm Grid View remove Object At Index:index animated: YES]; [_gm Grid View reload Object At Index:new Index animated: YES]; [_gm Grid View reload Object At Index:index animated: YES]; //////// [_gm Grid View reload Input Views]; [_gm Grid View reload Data]; break; case NSFetched Results Change Move: [_current Data remove Object At Index:index Path.row]; [_current Data insert Object:an Object at Index:new Index Path.row]; [_gm Grid View remove Object At Index:index animated: YES]; [_gm Grid View insert Object At Index:new Index animated: YES]; [_gm Grid View reload Input Views]; [_gm Grid View reload Data]; break; } } _current Data = [[self.fetched Results Controller fetched Objects]mutable Copy]; //I did this because previously I wasn't using a fetched Results Controller but a NSMutable Array instead.

I know that it's inefficient (because I have 2 models) but this is the simplest implementation I want to do now.

There is standard code available from Apple that you should consider including in your table view controller.

This is because the cache does not work when the NSFetched Results Controller is used from any thread but the main thread due to a bug in Core Data. The cache is only used to cache information related to building sections, now that you are not blocking the UI this is a lot less useful. Slow and synchronous access to the fetched results controller may have been hiding bugs that will now become obvious.

As reddit user indirectly pointed out, it is worth repeating that you should be following the rules of queue confinement when accessing managed objects or a managed object context.

There is no requirement that it should be, and it actually does work very well with a private queue. Unless your whole application uses thread confinement. Using NSFetched Results Controller to do “background” fetching is, as you can see, easy.

NSFetch Request *request = [NSFetch Request fetch Request With Entity Name:@"Product"]; request.predicate = [NSPredicate predicate With Format:@"product_id = %@", [imonggo Info object For Key: PRODUCT_ID; NSSort Descriptor *sort Descriptor = [NSSort Descriptor sort Descriptor With Key:@"name" ascending: YES]; Descriptors = [NSArray array With Object:sort Descriptor]; NSError *error = nil; NSArray *matches = [context execute Fetch Request:request error:&error]; if (!

NSFetch Request *fetch Request = NSFetch Request alloc] init]; NSEntity Description *entity = [NSEntity Description entity For Name:@"Cat" in Managed Object Context:self.managed Object Context]; [fetch Request set Entity:entity]; NSSort Descriptor *sort = [[NSSort Descriptor alloc] init With Key:@"age" ascending: YES]; [fetch Request set Sort Descriptors:[NSArray array With Object:sort; NSFetched Results Controller *the Fetched Results Controller = NSFetched Results Controller alloc] init With Fetch Request:fetch Request managed Object Context:self.managed Object Context section Name Key Path:@"age" cache Name:@"whatever"]; self.fetched Results Controller = the Fetched Results Controller; _fetched Results Controller.delegate = self; NSPredicate *predicate = ...; //based on buttons pressed [[self.fetched Results Controller fetch Request] set Predicate:predicate]; [NSFetched Results Controller delete Cache With Name:@"whatever"]; NSError * error = nil; [self.fetched Results Controller perform Fetch:&error]; if (error) { DDLog Error(@"[%@ %@] fetched Results Controller ERROR: %@", THIS_FILE, THIS_METHOD, error.localized Description); } [Table View reload Data]; The problem is that the table view does not reload.

; NSSort Descriptor *sort Descriptor = [NSSort Descriptor sort Descriptor With Key:@"name" ascending: YES]; Descriptors = [NSArray array With Object:sort Descriptor]; NSError *error = nil; NSArray *matches = [context execute Fetch Request:request error:&error]; if (!NSFetch Request *fetch Request = NSFetch Request alloc] init]; NSEntity Description *entity = [NSEntity Description entity For Name:@"Cat" in Managed Object Context:self.managed Object Context]; [fetch Request set Entity:entity]; NSSort Descriptor *sort = [[NSSort Descriptor alloc] init With Key:@"age" ascending: YES]; [fetch Request set Sort Descriptors:[NSArray array With Object:sort; NSFetched Results Controller *the Fetched Results Controller = NSFetched Results Controller alloc] init With Fetch Request:fetch Request managed Object Context:self.managed Object Context section Name Key Path:@"age" cache Name:@"whatever"]; self.fetched Results Controller = the Fetched Results Controller; _fetched Results Controller.delegate = self; NSPredicate *predicate = ...; //based on buttons pressed [[self.fetched Results Controller fetch Request] set Predicate:predicate]; [NSFetched Results Controller delete Cache With Name:@"whatever"]; NSError * error = nil; [self.fetched Results Controller perform Fetch:&error]; if (error) { DDLog Error(@"[%@ %@] fetched Results Controller ERROR: %@", THIS_FILE, THIS_METHOD, error.localized Description); } [Table View reload Data]; The problem is that the table view does not reload.