Ios UICollectionView移动项目并保持单元格大小

我有不同大小的单元格，我正在尝试移动CollectionView单元格，并将移动/选定的单元格大小移动到新位置

我已经在Github上公开了，如果你想成为合作者，请告诉我

我正在对UICollectionViewFlowLayout进行子分类，并实现了以下功能：

- (UICollectionViewLayoutInvalidationContext *)invalidationContextForInteractivelyMovingItems:(NSArray<NSIndexPath *> *)targetIndexPaths withTargetPosition:(CGPoint)targetPosition previousIndexPaths:(NSArray<NSIndexPath *> *)previousIndexPaths previousPosition:(CGPoint)previousPosition{

    UICollectionViewLayoutInvalidationContext *context = [super
                                                          invalidationContextForInteractivelyMovingItems:targetIndexPaths
                                                          withTargetPosition:targetPosition
                                                          previousIndexPaths:previousIndexPaths
                                                          previousPosition:previousPosition];

    [self.collectionView moveItemAtIndexPath:previousIndexPaths[0] toIndexPath:targetIndexPaths[0]];

    return context;
}

---

您知道如何保持大小吗？

我遇到了相同的问题，原因是您需要调用代理的moveItemAtIndexPath

- (UICollectionViewLayoutInvalidationContext *)invalidationContextForInteractivelyMovingItems:(NSArray<NSIndexPath *> *)targetIndexPaths withTargetPosition:(CGPoint)targetPosition previousIndexPaths:(NSArray<NSIndexPath *> *)previousIndexPaths previousPosition:(CGPoint)previousPosition{

    UICollectionViewLayoutInvalidationContext *context = [super
                                                          invalidationContextForInteractivelyMovingItems:targetIndexPaths
                                                          withTargetPosition:targetPosition
                                                          previousIndexPaths:previousIndexPaths
                                                          previousPosition:previousPosition];

    [self.collectionView.dataSource collectionView:self.collectionView moveItemAtIndexPath:previousIndexPaths[0] toIndexPath:targetIndexPaths[0]];

    return context;
}

-（UICollectionViewLayoutInvalidationContext*）无效上下文用于交互操作项：（NSArray*）targetIndexPath with targetPosition:（CGPoint）targetPosition PreviousIndexPath:（NSArray*）PreviousIndexPath previousPosition:（CGPoint）previousPosition{
UICollectionViewLayoutInvalidationContext*上下文=[super]
InvalizationContextForInteractivelyMovingItems:TargetIndexPath
withTargetPosition:targetPosition
previousIndexPaths：previousIndexPaths
previousPosition:previousPosition]；
[self.collectionView.dataSource collectionView:self.collectionView moveItemAtIndexPath:PreviousIndexPath[0]到IndexPath:TargetIndexPath[0]]；
返回上下文；
}

单元格的大小是随机的还是相对于内容进行初始化？它相对于内容。我的灵感来自：好吧，那么你的问题是你的下拉视图的大小与你拖动它之前的大小不一样？对，单元格大小的改变不太容易，对吧：-）

- (UICollectionViewLayoutInvalidationContext *)invalidationContextForInteractivelyMovingItems:(NSArray<NSIndexPath *> *)targetIndexPaths withTargetPosition:(CGPoint)targetPosition previousIndexPaths:(NSArray<NSIndexPath *> *)previousIndexPaths previousPosition:(CGPoint)previousPosition{

    UICollectionViewLayoutInvalidationContext *context = [super
                                                          invalidationContextForInteractivelyMovingItems:targetIndexPaths
                                                          withTargetPosition:targetPosition
                                                          previousIndexPaths:previousIndexPaths
                                                          previousPosition:previousPosition];

    [self.collectionView.dataSource collectionView:self.collectionView moveItemAtIndexPath:previousIndexPaths[0] toIndexPath:targetIndexPaths[0]];

    return context;
}