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Exposes ASCollectionView's ability to determine scroll direction. Scroll direction detection can now support 2-axis collection view layouts. ASCollectionView can now determine scrollable axes.

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Rene Cacheaux
2015-06-21 11:45:25 -05:00
parent a7f7620b8c
commit e46c13edc5
7 changed files with 136 additions and 12 deletions
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20
AsyncDisplayKit/Details/ASScrollDirection.m Normal file
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/* Copyright (c) 2015-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 "ASScrollDirection.h"
const ASScrollDirection ASScrollDirectionHorizontalDirections = ASScrollDirectionLeft | ASScrollDirectionRight;
const ASScrollDirection ASScrollDirectionVerticalDirections = ASScrollDirectionUp | ASScrollDirectionDown;
BOOL ASScrollDirectionContainsVerticalDirection(ASScrollDirection scrollDirection) {
return (scrollDirection & ASScrollDirectionVerticalDirections) != 0;
}
BOOL ASScrollDirectionContainsHorizontalDirection(ASScrollDirection scrollDirection) {
return (scrollDirection & ASScrollDirectionHorizontalDirections) != 0;
}