99 lines
4.8 KiB
Objective-C
99 lines
4.8 KiB
Objective-C
// MIT License
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//
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// Copyright (c) 2019 https://liangdahong.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#import <UIKit/UIKit.h>
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NS_ASSUME_NONNULL_BEGIN
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@class BMLongPressDragCellCollectionView;
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@protocol BMLongPressDragCellCollectionViewDelegate <UICollectionViewDelegateFlowLayout>
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@required
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/**
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Cell 有交换时调用
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@param dragCellCollectionView dragCellCollectionView
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@param newDataArray 最新的数据源，需要使用者保存，在拖拽的时候 Cell 已经移动，需保存最新的数据源
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- (void)dragCellCollectionView:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView newDataArrayAfterMove:(nullable NSArray <NSArray <id> *> *)newDataArray {
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self.dataArray = [newDataArray copy];
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}
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*/
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- (void)dragCellCollectionView:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView newDataArrayAfterMove:(nullable NSArray <NSArray <id> *> *)newDataArray;
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@optional
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/**
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将要开始拖拽时，询问此位置的 Cell 是否能拖拽
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@param dragCellCollectionView dragCellCollectionView
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@param indexPath indexPath
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@return YES: 正常拖拽和移动 NO:此 Cell 不可拖拽，如：增加按钮等。
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*/
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- (BOOL)dragCellCollectionViewShouldBeginMove:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView indexPath:(NSIndexPath *)indexPath;
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/**
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将要开始拖拽时，向外面获取需要拖拽的 View，如果不实现就内部自动处理。
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@param dragCellCollectionView dragCellCollectionView
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@param indexPath indexPath
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@return dragView
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*/
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- (UIView *)dragCellCollectionView:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView startDragAtIndexPath:(NSIndexPath *)indexPath;
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/// 开始拖拽时，让外面的使用者可以对拖拽的 View 做额外操作
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/// @param dragCellCollectionView dragCellCollectionView
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/// @param dragView dragView
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/// @param indexPath indexPath
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- (void)dragCellCollectionView:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView dragView:(UIView *)dragView indexPath:(NSIndexPath *)indexPath;
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/// 正在拖拽时
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/// @param dragCellCollectionView dragCellCollectionView
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/// @param point 手指触摸点对于 collectionView 的位置
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/// 可以参考 https://github.com/liangdahong/ToutiaoDemo/blob/master/ToutiaoDemo/Classes/Edit/Controller/BMChannelEditVC.m 的使用
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- (void)dragCellCollectionView:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView changedDragAtPoint:(CGPoint)point;
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/// cell 将要交换时，询问是否能交换
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/// @param dragCellCollectionView dragCellCollectionView
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/// @param sourceIndexPath 原来的 IndexPath
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/// @param destinationIndexPath 将要交换的 IndexPath
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/// YES: 正常拖拽和移动 NO:此Cell不可拖拽，如：增加按钮等。
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- (BOOL)dragCellCollectionViewShouldBeginExchange:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView sourceIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath;
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/// 结束交换时
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/// @param dragCellCollectionView dragCellCollectionView
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/// @param sourceIndexPath 原来的 IndexPath
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/// @param destinationIndexPath 被交换的 IndexPath
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- (void)dragCellCollectionViewShouldEndExchange:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView sourceIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath;
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/// 结束拖拽时
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/// @param dragCellCollectionView dragCellCollectionView
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/// @param point 手指触摸点对于 collectionView 的位置
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/// 可以参考 https://github.com/liangdahong/ToutiaoDemo/blob/master/ToutiaoDemo/Classes/Edit/Controller/BMChannelEditVC.m 的使用
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- (void)dragCellCollectionView:(__kindof BMLongPressDragCellCollectionView *)dragCellCollectionView endedDragAtPoint:(CGPoint)point;
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@end
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NS_ASSUME_NONNULL_END
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