挿入 ( NSFetchedResultsChangeInsert) は、同じ managedObjectContext save-merge 通知を使用して、同じスレッドからバックグラウンド スレッドから機能しているため、正しく保存されますが、削除は機能しません (テーブルビューに表示される削除アニメーションが機能しないため)。
更新され、問題のある SchedulesViewController.m のすべてのコードが表示されるようになりました。
#import "SchedulesViewController.h"
#import "CustomScheduleTableViewCell.h"
#import <QuartzCore/QuartzCore.h>
#import "ViewScheduleViewController.h"
@implementation SchedulesViewController {
NSIndexPath *deleteActionIndexPath;
}
@synthesize fetchedResultsController, managedObjectContext;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
if (managedObjectContext == nil) {
managedObjectContext = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
}
self.title = @"Schema's";
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
NSError *error = nil;
if (![[self fetchedResultsController] performFetch:&error]) {
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
//storedReminderSchedules = nil;
//context = nil;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
NSLog(@"Schedules viewWillAppear");
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[fetchedResultsController sections] count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
// check if we really have any sections in the managed object:
//if (!fetchedResultsController.sections.count) return @"Persoonlijk";
id <NSFetchedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo name];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// check if we really have any sections in the managed object:
//if (!fetchedResultsController.sections.count) return 0;
id <NSFetchedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"ScheduleCell";
CustomScheduleTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
[self configureCell:cell atIndexPath:indexPath];
return cell;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
- (void)configureCell:(CustomScheduleTableViewCell*)cell atIndexPath:(NSIndexPath*)indexPath {
// Configure the cell.
ReminderSchedule *reminderSchedule = [fetchedResultsController objectAtIndexPath:indexPath];
cell.name.text = reminderSchedule.name;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([[[[fetchedResultsController sections] objectAtIndex:indexPath.section] name] hasPrefix:@"Dr."]) {
ViewScheduleViewController *controller = [[ViewScheduleViewController alloc]init];
controller.reminderSchedule = [self.fetchedResultsController objectAtIndexPath:[self.tableView indexPathForSelectedRow]];
controller.context = [fetchedResultsController managedObjectContext];
[self.navigationController pushViewController:controller animated:YES];
}
else {
[self performSegueWithIdentifier:@"EditSchedule" sender:self];
}
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {
return UITableViewCellEditingStyleDelete;
}
#pragma mark - ModifyScheduleViewControllerDelegate
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:@"AddSchedule"])
{
[TestFlight passCheckpoint:@"Add Schedule"];
// Get reference to the destination view controller
UINavigationController *navigationController = segue.destinationViewController;
ModifyScheduleViewController *controller = [[navigationController viewControllers] objectAtIndex:0];
controller.delegate = self;
controller.fetchedResultsController = self.fetchedResultsController;
[controller.navigationItem.rightBarButtonItem setEnabled:NO];
}
else if ([segue.identifier isEqualToString:@"EditSchedule"]) {
[TestFlight passCheckpoint:@"Edit Schedule"];
// Get reference to the destination view controller
UINavigationController *navigationController = segue.destinationViewController;
ModifyScheduleViewController *controller = [[navigationController viewControllers] objectAtIndex:0];
controller.delegate = self;
controller.fetchedResultsController = self.fetchedResultsController;
controller.reminderSchedule = [self.fetchedResultsController objectAtIndexPath:[self.tableView indexPathForSelectedRow]];
}
}
#pragma mark -
#pragma mark Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController {
if (fetchedResultsController != nil) {
return fetchedResultsController;
}
/*
Set up the fetched results controller.
*/
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:@"ReminderSchedule" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptorName = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:NO];
NSSortDescriptor *sortDescriptorSection = [[NSSortDescriptor alloc] initWithKey:@"sectionName" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptorSection,sortDescriptorName, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:@"sectionName" cacheName:@"Root"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
return fetchedResultsController;
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type {
NSLog(@"didChangeSection");
switch(type) {
case NSFetchedResultsChangeUpdate:
[self.tableView reloadData];
break;
case NSFetchedResultsChangeInsert:
[self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
// Notifies the delegate that section and object changes are about to be processed and notifications will be sent.
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {
[self.tableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath
forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath {
switch (type) {
case NSFetchedResultsChangeInsert:
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]
withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:(CustomScheduleTableViewCell *)[self.tableView cellForRowAtIndexPath:indexPath]
atIndexPath:indexPath];
break;
case NSFetchedResultsChangeDelete:
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeMove:
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]
withRowAnimation:UITableViewRowAnimationFade];
break;
default:
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
[self.tableView endUpdates];
}
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration {
[self.tableView reloadData];
}
@end
追加情報を更新:
オブジェクトの挿入と削除は同じスレッドから行われ、同じ managedObjectContext を使用し、同じ保存ストアを使用します。実際、最初にオブジェクトが挿入され、次に他のオブジェクトが削除され、その後 1 回保存されます。
AppDelegate で保存マージをトリガーする NSManagedObjectContextDidSaveNotification を使用して保存しています。
より多くのコードを更新 します:
AppDelegate.m
- (void)saveContext
{
NSError *error = nil;
NSManagedObjectContext *managedObjectContext = self.managedObjectContext;
if (managedObjectContext != nil) {
if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
}
}
-(void)mergeChanges:(NSNotification *)saveNotification {
NSLog(@"Merging and saving");
if ([NSThread isMainThread])
[self.managedObjectContext mergeChangesFromContextDidSaveNotification:saveNotification];
else
[self performSelectorOnMainThread:@selector(mergeChanges:) withObject:saveNotification waitUntilDone:NO];
}
BacgroundThread.m
AppDelegate *theDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSNotificationCenter *notify = [NSNotificationCenter defaultCenter];
NSManagedObjectContext *newMoc = [[NSManagedObjectContext alloc] init];
[newMoc setPersistentStoreCoordinator:[theDelegate persistentStoreCoordinator]];
//説明のために挿入セクションを短縮 (挿入はうまくいきます)
ReminderSchedule *reminderSchedule = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:newMoc];
//実際のセクション削除コード
if ([jsonDict objectForKey:@"deletedSchedules"] != nil) {
NSArray *deletedSchedules = [jsonDict objectForKey:@"deletedSchedules"];
for (int i = 0; i < [deletedSchedules count]; i++) {
NSInteger externalScheduleID = [[deletedSchedules objectAtIndex:i] intValue];
NSLog(@"Removing schedule %d", externalScheduleID);
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"ReminderSchedule" inManagedObjectContext:newMoc];
[fetchRequest setEntity:entity];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"externalScheduleID == %d", externalScheduleID];
[fetchRequest setPredicate:predicate];
NSError *error = nil;
NSArray *result = [newMoc executeFetchRequest:fetchRequest error:&error];
for (NSManagedObject *managedObject in result) {
[newMoc deleteObject:managedObject];
}
}
}
//挿入と削除後に保存
NSError *saveError = nil;
if (![newMoc save:&saveError]) {
NSLog(@"Whoops, couldn't save: %@", [saveError localizedDescription]);
}
[[NSNotificationCenter defaultCenter] removeObserver:theDelegate];
更新 挿入と削除を行ってから保存します。挿入自体は機能します。削除自体は機能しません。