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Batch render supplementary views on reload data

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This commit is contained in:
Levi McCallum
2015-09-30 13:25:39 -07:00
parent a3dce24fdc
commit 835f9e99ca
4 changed files with 61 additions and 23 deletions
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39
AsyncDisplayKit/Details/ASCollectionDataController.mm
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@@ -23,29 +23,32 @@
@implementation ASCollectionDataController {
NSMutableDictionary *_completedSupplementaryNodes;
NSMutableDictionary *_editingSupplementaryNodes;
NSMutableDictionary *_pendingNodes;
NSMutableDictionary *_pendingIndexPaths;
}
- (void)initialSupplementaryLoading
- (void)prepareForReloadData
{
[self performEditCommandWithBlock:^{
ASDisplayNodeAssertMainThread();
[self accessDataSourceWithBlock:^{
NSArray *elementKinds = [self.collectionDataSource supplementaryNodeKindsInDataController:self];
[elementKinds enumerateObjectsUsingBlock:^(NSString *kind, NSUInteger idx, BOOL * _Nonnull stop) {
_completedSupplementaryNodes[kind] = [NSMutableArray array];
_editingSupplementaryNodes[kind] = [NSMutableArray array];
NSMutableArray *indexPaths = [NSMutableArray array];
NSMutableArray *nodes = [NSMutableArray array];
[self _populateSupplementaryNodesOfKind:kind withMutableNodes:nodes mutableIndexPaths:indexPaths];
[self batchLayoutNodes:nodes atIndexPaths:indexPaths constrainedSize:^ASSizeRange(NSIndexPath *indexPath) {
return [self.collectionDataSource dataController:self constrainedSizeForSupplementaryNodeOfKind:kind atIndexPath:indexPath];
} completion:nil];
}];
}];
NSArray *elementKinds = [self.collectionDataSource supplementaryNodeKindsInDataController:self];
[elementKinds enumerateObjectsUsingBlock:^(NSString *kind, NSUInteger idx, BOOL * _Nonnull stop) {
NSMutableArray *indexPaths = [NSMutableArray array];
NSMutableArray *nodes = [NSMutableArray array];
[self _populateSupplementaryNodesOfKind:kind withMutableNodes:nodes mutableIndexPaths:indexPaths];
_pendingNodes[kind] = nodes;
_pendingIndexPaths[kind] = indexPaths;
}];
}
- (void)willReloadData
{
[_pendingNodes enumerateKeysAndObjectsUsingBlock:^(NSString *kind, NSMutableArray *nodes, BOOL *stop) {
[self batchLayoutNodes:nodes atIndexPaths:_pendingIndexPaths[kind] constrainedSize:^ASSizeRange(NSIndexPath *indexPath) {
return [self.collectionDataSource dataController:self constrainedSizeForSupplementaryNodeOfKind:kind atIndexPath:indexPath];
} completion:nil];
}];
}
- (void)_populateSupplementaryNodesOfKind:(NSString *)kind withMutableNodes:(NSMutableArray *)nodes mutableIndexPaths:(NSMutableArray *)indexPaths
{
NSUInteger sectionCount = [self.collectionDataSource dataController:self numberOfSectionsForSupplementaryKind:kind];