ContainerCollectionViewCellDelegate
public protocol ContainerCollectionViewCellDelegate : AnyObject
A delegate of ContainerCollectionViewCell
/ContainerCollectionReusableView
should implement this methods if
it is required to participate in containers lifecycle.
-
prepareForReuse()
Default implementationPerform any clean up necessary to prepare the view for use again.
Default Implementation
Declaration
Swift
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 returnlayoutAttributes
without modifications.Default Implementation
Declaration
Swift
func preferredLayoutAttributesFitting(_ layoutAttributes: ChatLayoutAttributes) -> ChatLayoutAttributes?
Parameters
layoutAttributes
ChatLayoutAttributes
provided byChatLayout
Return Value
Modified
ChatLayoutAttributes
on nil ifUICollectionReusableView.preferredLayoutAttributesFitting(...)
should be called instead. -
modifyPreferredLayoutAttributesFitting(_:
Default implementation) Allows to additionally modify
ChatLayoutAttributes
after theUICollectionReusableView.preferredLayoutAttributesFitting(...)
call.Default Implementation
Declaration
Swift
func modifyPreferredLayoutAttributesFitting(_ layoutAttributes: ChatLayoutAttributes)
Parameters
layoutAttributes
ChatLayoutAttributes
provided byChatLayout
.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
Declaration
Swift
func apply(_ layoutAttributes: ChatLayoutAttributes)
Parameters
layoutAttributes
ChatLayoutAttributes
provided byChatLayout
.