IGListCollectionView


@interface IGListCollectionView : UICollectionView

This UICollectionView subclass allows for partial layout invalidation using IGListCollectionViewLayout, or custom layout classes that conform to IGListCollectionViewLayoutCompatible.

Note

When updating a collection view (ex: calling -insertSections), -invalidateLayoutWithContext gets called on the layout object. However, the invalidation context doesn’t provide details on which index paths are being modified, which typically forces a full layout re-calculation. IGListCollectionView gives IGListCollectionViewLayout the missing information to re-calculate only the modified layout attributes.
  • Create a new view with an IGListcollectionViewLayout class or subclass.

    Note

    You can initialize a new view with a base layout by simply calling -[IGListCollectionView initWithFrame:].

    Declaration

    Objective-C

    - (nonnull instancetype)
                   initWithFrame:(CGRect)frame
        listCollectionViewLayout:
            (nonnull UICollectionViewLayout<IGListCollectionViewLayoutCompatible> *)
                collectionViewLayout;

    Parameters

    frame

    The frame to initialize with.

    collectionViewLayout

    The layout to use with the collection view. You can use IGListCollectionViewLayout here, or a custom layout class that conforms to IGListCollectionViewLayoutCompatible.