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[ASCollectionView] Finish support for interoperability with base-class UICollectionViewCells.

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This also supports supplementary nodes. It builds off of Adlai's .interop flag but makes necessary
improvements for all of the delegate methods to work in practice with heterogenous cell types.
This commit is contained in:
Scott Goodson
2017-02-04 20:38:45 -08:00
parent e2e797be6e
commit f71eba77af
13 changed files with 281 additions and 150 deletions
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41
examples/CustomCollectionView/Sample/MosaicCollectionViewLayout.m
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@@ -54,7 +54,7 @@
top += _sectionInset.top;
if (_headerHeight > 0) {
CGSize headerSize = [self _headerSizeForSection:section];
CGSize headerSize = [self headerSizeForSection:section];
UICollectionViewLayoutAttributes *attributes = [UICollectionViewLayoutAttributes
layoutAttributesForSupplementaryViewOfKind:UICollectionElementKindSectionHeader
withIndexPath:[NSIndexPath indexPathForItem:0 inSection:section]];
@@ -75,7 +75,7 @@
NSUInteger columnIndex = [self _shortestColumnIndexInSection:section];
NSIndexPath *indexPath = [NSIndexPath indexPathForItem:idx inSection:section];
CGSize itemSize = [self _itemSizeAtIndexPath:indexPath];
CGSize itemSize = [self itemSizeAtIndexPath:indexPath];
CGFloat xOffset = _sectionInset.left + (columnWidth + _columnSpacing) * columnIndex;
CGFloat yOffset = [_columnHeights[section][columnIndex] floatValue];
@@ -146,7 +146,7 @@
return ([self _widthForSection:section] - ((_numberOfColumns - 1) * _columnSpacing)) / _numberOfColumns;
}
- (CGSize)_itemSizeAtIndexPath:(NSIndexPath *)indexPath
- (CGSize)itemSizeAtIndexPath:(NSIndexPath *)indexPath
{
CGSize size = CGSizeMake([self _columnWidthForSection:indexPath.section], 0);
CGSize originalSize = [[self _delegate] collectionView:self.collectionView layout:self originalItemSizeAtIndexPath:indexPath];
@@ -156,7 +156,7 @@
return size;
}
- (CGSize)_headerSizeForSection:(NSUInteger)section
- (CGSize)headerSizeForSection:(NSInteger)section
{
return CGSizeMake([self _widthForSection:section], _headerHeight);
}
@@ -199,36 +199,3 @@
}
@end
@implementation MosaicCollectionViewLayoutInspector
- (ASSizeRange)collectionView:(ASCollectionView *)collectionView constrainedSizeForNodeAtIndexPath:(NSIndexPath *)indexPath
{
MosaicCollectionViewLayout *layout = (MosaicCollectionViewLayout *)[collectionView collectionViewLayout];
return ASSizeRangeMake(CGSizeZero, [layout _itemSizeAtIndexPath:indexPath]);
}
- (ASSizeRange)collectionView:(ASCollectionView *)collectionView constrainedSizeForSupplementaryNodeOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
MosaicCollectionViewLayout *layout = (MosaicCollectionViewLayout *)[collectionView collectionViewLayout];
return ASSizeRangeMake(CGSizeZero, [layout _headerSizeForSection:indexPath.section]);
}
- (ASScrollDirection)scrollableDirections
{
return ASScrollDirectionVerticalDirections;
}
/**
* Asks the inspector for the number of supplementary views for the given kind in the specified section.
*/
- (NSUInteger)collectionView:(ASCollectionView *)collectionView supplementaryNodesOfKind:(NSString *)kind inSection:(NSUInteger)section
{
if ([kind isEqualToString:UICollectionElementKindSectionHeader]) {
return 1;
} else {
return 0;
}
}
@end