如何解决使用自动布局的 UICollectionViewCompositionalLayout 相等项目高度
我正在使用 UICollectionViewCompositionalLayout 来创建网格。每个单元格包含一个多行标签。我的目标是,当一个组/行中的 1 个项目增长时,该组/行中的所有其他项目都增长到相同的高度,例如在附图中,我希望第 2 列和第 3 列第 2 行中的单元格与包含 ("1000\ndetail") 的第一个单元格的高度相匹配。
我尝试了各种方法,例如将项目的高度设置为小数(1),但随后阻止了多行。其他尝试(例如更改组的维度)也无济于事。请问如何设置 UICollectionViewCompositionalLayout 来实现我的目标?
集合视图:
NSCollectionLayoutSize *itemSize = [NSCollectionLayoutSize sizeWithWidthDimension:[NSCollectionLayoutDimension fractionalWidthDimension:0.333] heightDimension:[NSCollectionLayoutDimension fractionalHeightDimension:1]];
NSCollectionLayoutItem *item = [NSCollectionLayoutItem itemWithLayoutSize:itemSize];
NSCollectionLayoutSize *groupSize = [NSCollectionLayoutSize sizeWithWidthDimension:[NSCollectionLayoutDimension fractionalWidthDimension:1] heightDimension:[NSCollectionLayoutDimension estimatedDimension:40]];
NSCollectionLayoutGroup *group = [NSCollectionLayoutGroup horizontalGroupWithLayoutSize:groupSize subitem:item count:3];
NSCollectionLayoutSection *section = [NSCollectionLayoutSection sectionWithGroup:group];
UICollectionViewCompositionalLayout *compositionalLayout = [[UICollectionViewCompositionalLayout alloc] initWithSection:section];
UICollectionView *cv = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:compositionalLayout];
cv.translatesAutoresizingMaskIntoConstraints = NO;
cv.dataSource = self;
cv.delegate = self;
[self.view addSubview:cv];
[cv registerClass:[GridCVCell class] forCellWithReuseIdentifier:@"Cell"];
[cv.topAnchor constraintEqualToAnchor:self.view.topAnchor constant:100].active = YES;
[cv.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:0].active = YES;
[cv.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:0].active = YES;
[cv.heightAnchor constraintEqualToConstant:300].active = YES;
CollectionViewCell
- (instancetype)initWithFrame:(CGRect)frame {
if ([super initWithFrame:frame]) {
UILabel *titleL = [UIlabel new];
titleL.translatesAutoresizingMaskIntoConstraints = NO;
[self.contentView addSubview:titleL];
[titleL.leadingAnchor constraintEqualToAnchor:self.contentView.leadingAnchor constant:10].active = YES;
[titleL.trailingAnchor constraintEqualToAnchor:self.contentView.trailingAnchor constant:-10].active = YES;
[titleL.centerYAnchor constraintEqualToAnchor:self.contentView.centerYAnchor constant:-2].active = YES;
[self.contentView.heightAnchor constraintEqualToAnchor:titleL.heightAnchor constant:10].active = YES;
}
return self;
}
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