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8c3af252be
We can credit any contributor who would like to be credited this way, by adding them on request to the AUTHORS file. The copyright statement changes are required for this to work. Note that this has... Summary: We can credit any contributor who would like to be credited this way, by adding them on request to the AUTHORS file. The copyright statement changes are required for this to work. Note that this has no legal change, since the contributors always retained their copyright despite the copyright notice, but it's a nice acknowledgement. Changed copyright statement to include non-Google authors. Command run: find * \( -name '*\.m' -or -name '*\.h' -or -name '*\.swift' \) -and -not \( -path 'scripts/external*' -name Pods \) -print0 | xargs -0 sed -i '' 's/Copyright \(.*\) Google Inc/Copyright \1 the Material Components for iOS authors/' Added non-source files. Command run: grep -Rl 'Copyright .* Google Inc' * --exclude-dir scripts/external --null | xargs -0 sed -i '' 's/Copyright \(.*\) Google Inc/Copyright \1 the Material Components for iOS authors/' Reviewers: featherless, O1 Material components iOS, randallli Reviewed By: O1 Material components iOS, randallli Tags: #material_components_ios Differential Revision: http://codereview.cc/D1415
132 lines
4.7 KiB
Objective-C
132 lines
4.7 KiB
Objective-C
/*
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Copyright 2016-present the Material Components for iOS authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "CollectionsEditingExample.h"
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static const NSInteger kSectionCount = 10;
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static const NSInteger kSectionItemCount = 5;
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static NSString *const kReusableIdentifierItem = @"itemCellIdentifier";
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@implementation CollectionsEditingExample {
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NSMutableArray *_content;
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}
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+ (NSArray *)catalogBreadcrumbs {
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return @[ @"Collections", @"Cell Editing Example" ];
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}
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- (void)viewDidLoad {
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[super viewDidLoad];
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// Add button to toggle edit mode.
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[self updatedRightBarButtonItem:NO];
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// Register cell class.
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[self.collectionView registerClass:[MDCCollectionViewTextCell class]
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forCellWithReuseIdentifier:kReusableIdentifierItem];
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// Populate content.
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_content = [NSMutableArray array];
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for (NSInteger i = 0; i < kSectionCount; i++) {
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NSMutableArray *items = [NSMutableArray array];
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for (NSInteger j = 0; j < kSectionItemCount; j++) {
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NSString *itemString = [NSString stringWithFormat:@"Section-%zd Item-%zd", i, j];
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[items addObject:itemString];
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}
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[_content addObject:items];
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}
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// Customize collection view settings.
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self.styler.cellStyle = MDCCollectionViewCellStyleCard;
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}
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- (void)updatedRightBarButtonItem:(BOOL)isEditing {
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self.navigationItem.rightBarButtonItem =
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[[UIBarButtonItem alloc] initWithTitle:isEditing ? @"Cancel" : @"Edit"
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style:UIBarButtonItemStyleDone
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target:self
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action:@selector(toggleEditMode:)];
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}
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- (void)toggleEditMode:(id)sender {
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BOOL isEditing = self.editor.isEditing;
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[self updatedRightBarButtonItem:!isEditing];
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[self.editor setEditing:!isEditing animated:YES];
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}
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#pragma mark - <UICollectionViewDataSource>
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- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
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return [_content count];
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}
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- (NSInteger)collectionView:(UICollectionView *)collectionView
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numberOfItemsInSection:(NSInteger)section {
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return [_content[section] count];
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}
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- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
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cellForItemAtIndexPath:(NSIndexPath *)indexPath {
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MDCCollectionViewTextCell *cell =
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[collectionView dequeueReusableCellWithReuseIdentifier:kReusableIdentifierItem
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forIndexPath:indexPath];
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cell.textLabel.text = _content[indexPath.section][indexPath.item];
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return cell;
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}
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#pragma mark - <MDCCollectionViewEditingDelegate>
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- (BOOL)collectionViewAllowsEditing:(UICollectionView *)collectionView {
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return YES;
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}
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- (BOOL)collectionViewAllowsReordering:(UICollectionView *)collectionView {
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return YES;
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}
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- (BOOL)collectionViewAllowsSwipeToDismissItem:(UICollectionView *)collectionView {
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return self.editor.isEditing;
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}
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- (void)collectionView:(UICollectionView *)collectionView
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willDeleteItemsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths {
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// First sort reverse order then remove. This is done because when we delete an index path the
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// higher rows shift down, altering the index paths of those that we would like to delete in the
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// next iteration of this loop.
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NSArray *sortedArray = [indexPaths sortedArrayUsingSelector:@selector(compare:)];
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for (NSIndexPath *indexPath in [sortedArray reverseObjectEnumerator]) {
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[_content[indexPath.section] removeObjectAtIndex:indexPath.item];
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}
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}
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- (void)collectionView:(UICollectionView *)collectionView
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willMoveItemAtIndexPath:(NSIndexPath *)indexPath
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toIndexPath:(NSIndexPath *)newIndexPath {
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if (indexPath.section == newIndexPath.section) {
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// Exchange data within same section.
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[_content[indexPath.section] exchangeObjectAtIndex:indexPath.item
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withObjectAtIndex:newIndexPath.item];
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} else {
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// Since moving to different section, first remove data from index path and insert
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// at new index path.
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id movedObject = [_content[indexPath.section] objectAtIndex:indexPath.item];
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[_content[indexPath.section] removeObjectAtIndex:indexPath.item];
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[_content[newIndexPath.section] insertObject:movedObject atIndex:newIndexPath.item];
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}
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}
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@end
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