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Add TGRFetchedResultsTableViewController
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| // TGRFetchedResultsTableViewController.h | ||
| // | ||
| // Copyright (c) 2014 Guillermo Gonzalez | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
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| #import <UIKit/UIKit.h> | ||
| #import <CoreData/CoreData.h> | ||
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| @class TGRFetchedResultsDataSource; | ||
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| /** | ||
| `UITableViewController` subclass that takes its data from a `TGRFetchedResultsDataSource` object. | ||
| */ | ||
| @interface TGRFetchedResultsTableViewController : UITableViewController <NSFetchedResultsControllerDelegate> | ||
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| /** | ||
| The data source used by this view controller. | ||
| */ | ||
| @property (strong, nonatomic) TGRFetchedResultsDataSource *dataSource; | ||
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| /** | ||
| Maximum number of changes in the fetched results controller that will be animated. Default is 100. | ||
| */ | ||
| @property (nonatomic) NSUInteger contentAnimationMaximumChangeCount; | ||
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| /** | ||
| Performs the fetch and reloads the table view. | ||
| This method is called everytime the `dataSource` property changes. | ||
| */ | ||
| - (void)performFetch; | ||
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| @end |
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| // TGRFetchedResultsTableViewController.m | ||
| // | ||
| // Copyright (c) 2014 Guillermo Gonzalez | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
|
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| #import "TGRFetchedResultsTableViewController.h" | ||
| #import "TGRFetchedResultsDataSource.h" | ||
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| @interface TGRFetchedResultsTableViewController () | ||
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| @property (strong, nonatomic) NSMutableIndexSet *insertedSections; | ||
| @property (strong, nonatomic) NSMutableIndexSet *deletedSections; | ||
| @property (strong, nonatomic) NSMutableArray *insertedRows; | ||
| @property (strong, nonatomic) NSMutableArray *deletedRows; | ||
| @property (strong, nonatomic) NSMutableArray *updatedRows; | ||
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| @end | ||
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| @implementation TGRFetchedResultsTableViewController | ||
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| #pragma mark - Properties | ||
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| - (void)setDataSource:(TGRFetchedResultsDataSource *)dataSource { | ||
| if (_dataSource != dataSource) { | ||
| _dataSource.fetchedResultsController.delegate = nil; | ||
| _dataSource = dataSource; | ||
| _dataSource.fetchedResultsController.delegate = self; | ||
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| self.tableView.dataSource = dataSource; | ||
| [self performFetch]; | ||
| } | ||
| } | ||
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| #pragma mark - Lifecycle | ||
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| - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { | ||
| self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; | ||
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| if (self) { | ||
| _contentAnimationMaximumChangeCount = 100; | ||
| } | ||
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| return self; | ||
| } | ||
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| - (void)performFetch { | ||
| if (self.dataSource) { | ||
| NSError *error = nil; | ||
| [self.dataSource.fetchedResultsController performFetch:&error]; | ||
| NSAssert(error == nil, @"%@ performFetch: %@", self, error); | ||
| } | ||
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| [self.tableView reloadData]; | ||
| } | ||
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| #pragma mark - NSFetchedResultsControllerDelegate | ||
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| - (void) controller:(NSFetchedResultsController *)controller | ||
| didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo | ||
| atIndex:(NSUInteger)sectionIndex | ||
| forChangeType:(NSFetchedResultsChangeType)type { | ||
| switch (type) { | ||
| case NSFetchedResultsChangeInsert: | ||
| [self.insertedSections addIndex:sectionIndex]; | ||
| break; | ||
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| case NSFetchedResultsChangeDelete: | ||
| [self.deletedSections addIndex:sectionIndex]; | ||
| break; | ||
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| default: | ||
| break; | ||
| } | ||
| } | ||
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| - (void) controller:(NSFetchedResultsController *)controller | ||
| didChangeObject:(id)anObject | ||
| atIndexPath:(NSIndexPath *)indexPath | ||
| forChangeType:(NSFetchedResultsChangeType)type | ||
| newIndexPath:(NSIndexPath *)newIndexPath { | ||
| switch (type) { | ||
| case NSFetchedResultsChangeInsert: | ||
| if (![self.insertedSections containsIndex:(NSUInteger)newIndexPath.section]) { | ||
| [self.insertedRows addObject:newIndexPath]; | ||
| } | ||
| break; | ||
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| case NSFetchedResultsChangeDelete: | ||
| if (![self.deletedSections containsIndex:(NSUInteger)indexPath.section]) { | ||
| [self.deletedRows addObject:indexPath]; | ||
| } | ||
| break; | ||
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| case NSFetchedResultsChangeUpdate: | ||
| [self.updatedRows addObject:indexPath]; | ||
| break; | ||
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| case NSFetchedResultsChangeMove: | ||
| if (![self.insertedSections containsIndex:(NSUInteger)newIndexPath.section]) { | ||
| [self.insertedRows addObject:newIndexPath]; | ||
| } | ||
| if (![self.deletedSections containsIndex:(NSUInteger)indexPath.section]) { | ||
| [self.deletedRows addObject:indexPath]; | ||
| } | ||
| break; | ||
| } | ||
| } | ||
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| - (void)controllerDidChangeContent:(NSFetchedResultsController *)controller { | ||
| NSUInteger changeCount = self.insertedSections.count + | ||
| self.deletedSections.count + | ||
| self.insertedRows.count + | ||
| self.deletedRows.count + | ||
| self.updatedRows.count; | ||
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| if (changeCount <= self.contentAnimationMaximumChangeCount) { | ||
| [self.tableView beginUpdates]; | ||
| [self.tableView deleteSections:self.deletedSections withRowAnimation:UITableViewRowAnimationAutomatic]; | ||
| [self.tableView insertSections:self.insertedSections withRowAnimation:UITableViewRowAnimationAutomatic]; | ||
| [self.tableView deleteRowsAtIndexPaths:self.deletedRows withRowAnimation:UITableViewRowAnimationLeft]; | ||
| [self.tableView insertRowsAtIndexPaths:self.insertedRows withRowAnimation:UITableViewRowAnimationRight]; | ||
| [self.tableView reloadRowsAtIndexPaths:self.updatedRows withRowAnimation:UITableViewRowAnimationAutomatic]; | ||
| [self.tableView endUpdates]; | ||
| } | ||
| else { | ||
| [self.tableView reloadData]; | ||
| } | ||
|
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| self.insertedSections = nil; | ||
| self.deletedSections = nil; | ||
| self.insertedRows = nil; | ||
| self.deletedRows = nil; | ||
| self.updatedRows = nil; | ||
| } | ||
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| #pragma mark - Private | ||
|
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| - (NSMutableIndexSet *)insertedSections { | ||
| if (!_insertedSections) { | ||
| _insertedSections = [[NSMutableIndexSet alloc] init]; | ||
| } | ||
| return _insertedSections; | ||
| } | ||
|
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| - (NSMutableIndexSet *)deletedSections { | ||
| if (!_deletedSections) { | ||
| _deletedSections = [[NSMutableIndexSet alloc] init]; | ||
| } | ||
| return _deletedSections; | ||
| } | ||
|
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| - (NSMutableArray *)insertedRows { | ||
| if (!_insertedRows) { | ||
| _insertedRows = [[NSMutableArray alloc] init]; | ||
| } | ||
| return _insertedRows; | ||
| } | ||
|
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| - (NSMutableArray *)deletedRows { | ||
| if (!_deletedRows) { | ||
| _deletedRows = [[NSMutableArray alloc] init]; | ||
| } | ||
| return _deletedRows; | ||
| } | ||
|
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| - (NSMutableArray *)updatedRows { | ||
| if (!_updatedRows) { | ||
| _updatedRows = [[NSMutableArray alloc] init]; | ||
| } | ||
| return _updatedRows; | ||
| } | ||
|
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| @end |