mirror of
https://github.com/Instagram/IGListKit
synced 2026-04-21 21:47:34 +00:00
79348164a7
Summary: Started work on the plane to get this moving since #418 is up and ready to land. We'll likely need to spend some time fleshing out the API of this, and I think I'll split it up into a couple different PRs once ready for review. Putting this up now to get early feedback. This adds an auto-diffing section controller as outlined in #38. There are several key parts: - Subclass a new section controller `IGListAutoSectionController` (naming wip) - Connect a data source - Implement the data source methods that do 3 things: - Given a top-level object, transform it into an array of **diffable** view models - Given a view model, return a cell - Given a view model, return a size for a cell - A new protocol for the cell `IGListBindable` so that we can control when the cell is updated w/ the view model. - The most important part of this is that it unlocks moving and reloading a cell, which you can't do w/ `UICollectionView` - [ ] Unit test `reloadObjects:` - [x] Add Closes https://github.com/Instagram/IGListKit/pull/494 Reviewed By: amonshiz Differential Revision: D4696966 Pulled By: rnystrom fbshipit-source-id: f21b8341b3ed4389f2a4a106d0d316f481ba6943
58 lines
2.1 KiB
Objective-C
58 lines
2.1 KiB
Objective-C
/**
|
|
* Copyright (c) 2016-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*/
|
|
|
|
#import "IGTestDiffingSectionController.h"
|
|
|
|
#import "IGTestDiffingObject.h"
|
|
#import "IGTestStringBindableCell.h"
|
|
#import "IGTestNumberBindableCell.h"
|
|
#import "IGTestObject.h"
|
|
#import "IGTestCell.h"
|
|
|
|
@implementation IGTestDiffingSectionController
|
|
|
|
- (instancetype)init {
|
|
if (self = [super init]) {
|
|
self.dataSource = self;
|
|
self.selectionDelegate = self;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
#pragma mark - IGListBindingSectionControllerDataSource
|
|
|
|
- (NSArray<id<IGListDiffable>> *)sectionController:(IGListBindingSectionController *)sectionController viewModelsForObject:(id)object {
|
|
return [(IGTestDiffingObject *)object objects];
|
|
}
|
|
|
|
- (UICollectionViewCell<IGListBindable> *)sectionController:(IGListBindingSectionController *)sectionController cellForViewModel:(id)viewModel atIndex:(NSInteger)index {
|
|
Class cellClass;
|
|
if ([viewModel isKindOfClass:[NSString class]]) {
|
|
cellClass = [IGTestStringBindableCell class];
|
|
} else if ([viewModel isKindOfClass:[NSNumber class]]) {
|
|
cellClass = [IGTestNumberBindableCell class];
|
|
} else {
|
|
cellClass = [IGTestCell class];
|
|
}
|
|
id cell = [self.collectionContext dequeueReusableCellOfClass:cellClass forSectionController:self atIndex:index];
|
|
return cell;
|
|
}
|
|
|
|
- (CGSize)sectionController:(IGListBindingSectionController *)sectionController sizeForViewModel:(id)viewModel atIndex:(NSInteger)index {
|
|
const BOOL isString = [viewModel isKindOfClass:[NSString class]];
|
|
return CGSizeMake([self.collectionContext containerSize].width, isString ? 55 : 30);
|
|
}
|
|
|
|
#pragma mark - IGListBindingSectionControllerSelectionDelegate
|
|
|
|
- (void)sectionController:(IGListBindingSectionController *)sectionController didSelectItemAtIndex:(NSInteger)index viewModel:(id)viewModel {
|
|
self.selectedViewModel = viewModel;
|
|
}
|
|
|
|
@end
|