ContainerCollectionViewCellDelegate

@MainActor
public protocol ContainerCollectionViewCellDelegate : AnyObject

A delegate of ContainerCollectionViewCell/ContainerCollectionReusableView should implement this methods if it is required to participate in containers lifecycle.

prepareForReuse() Default implementation
Perform any clean up necessary to prepare the view for use again.

Default Implementation

Default implementation does nothing.
Declaration
Swift

@MainActor func prepareForReuse()


                    
                    
                    preferredLayoutAttributesFitting(_:)

Default implementation

Allows to override the call of ContainerCollectionViewCell/ContainerCollectionReusableView UICollectionReusableView.preferredLayoutAttributesFitting(...) and make the layout calculations.

NB: You must override it to avoid unnecessary autolayout calculations if you are providing exact cell size in ChatLayoutDelegate.sizeForItem(...) and return layoutAttributes without modifications.

Default Implementation

Default implementation returns: nil.

Declaration

Swift

@MainActor
func preferredLayoutAttributesFitting(_ layoutAttributes: ChatLayoutAttributes) -> ChatLayoutAttributes?

Parameters


                                layoutAttributes

ChatLayoutAttributes provided by CollectionViewChatLayout

Return Value

Modified ChatLayoutAttributes on nil if UICollectionReusableView.preferredLayoutAttributesFitting(...) should be called instead.


                    
                    
                    modifyPreferredLayoutAttributesFitting(_:)

Default implementation

Allows to additionally modify ChatLayoutAttributes after the UICollectionReusableView.preferredLayoutAttributesFitting(...) call.

Default Implementation

Default implementation does nothing.

Declaration

Swift

@MainActor
func modifyPreferredLayoutAttributesFitting(_ layoutAttributes: ChatLayoutAttributes)

Parameters


                                layoutAttributes

ChatLayoutAttributes provided by CollectionViewChatLayout.

Return Value

Modified ChatLayoutAttributes


                    
                    
                    apply(_:)

Default implementation

Apply the specified layout attributes to the view. Keep in mind that this method can be called multiple times.

Default Implementation

Default implementation does nothing.

Declaration

Swift

@MainActor
func apply(_ layoutAttributes: ChatLayoutAttributes)

Parameters


                                layoutAttributes

ChatLayoutAttributes provided by CollectionViewChatLayout.