CollectionViewDelegateFlowLayout

public protocol CollectionViewDelegateFlowLayout

Element Size


                      
                      
                      collectionView(_:flowLayout:styleForItemAt:)

Default implementation

Asks the delegate for the layout style for the item at the specified index path

Default Implementation

Declaration

Swift

func collectionView(_ collectionView: CollectionView, flowLayout: CollectionViewFlowLayout, styleForItemAt indexPath: IndexPath) -> CollectionViewFlowLayout.ItemStyle

Parameters

`collectionView`	The collection view requesting the information
`gridLayout`	The layout
`indexPath`	The index path of the item to style

Return Value

A style to apply to the item


                      
                      
                      collectionView(_:flowLayout:heightForHeaderInSection:)

Default implementation

Asks the delegate for the height of the header view in a specified section

Return 0 for no header view

Default Implementation

Declaration

Swift

func collectionView(_ collectionView: CollectionView, flowLayout collectionViewLayout: CollectionViewFlowLayout, heightForHeaderInSection section: Int) -> CGFloat

Parameters

`collectionView`	The collection view requesting the information
`collectionViewLayout`	The layout
`section`	The section affected by this height

Return Value

The height to apply to the header view in the specified section


                      
                      
                      collectionView(_:flowLayout:heightForFooterInSection:)

Default implementation

Asks the delegate for the height of the footer view in a specified section

Return 0 for no footer view

Default Implementation

Declaration

Swift

func collectionView(_ collectionView: CollectionView, flowLayout collectionViewLayout: CollectionViewFlowLayout, heightForFooterInSection section: Int) -> CGFloat

Parameters

`collectionView`	The collection view requesting the information
`collectionViewLayout`	The layout
`section`	The section affected by this height

Return Value

The height to apply to the header view in the specified section

Insets & Transforms


                      
                      
                      collectionView(_:flowLayout:insetsForSectionAt:)

Default implementation

Asks the delegate for the insets for the content of the specified index path

Default Implementation

Declaration

Swift

func collectionView(_ collectionView: CollectionView, flowLayout collectionViewLayout: CollectionViewFlowLayout, insetsForSectionAt section: Int) -> NSEdgeInsets

Parameters

`collectionView`	The collection view requesting the information
`collectionViewLayout`	The layout
`section`	Thhe section that the return value will be applied to

Return Value

Edge insets for the specified section


                      
                      
                      collectionView(_:flowLayout:rowTransformForSectionAt:)

Default implementation

Asks the delegate for a transform to apply to the content in each row the specified section, defaults to .none

Default Implementation

Declaration

Swift

func collectionView(_ collectionView: CollectionView, flowLayout collectionViewLayout: CollectionViewFlowLayout, rowTransformForSectionAt section: Int) -> CollectionViewFlowLayout.RowTransform

Parameters

`collectionView`	The collection requesting the information
`collectionViewLayout`	The layout
`section`	The section to transform

Return Value

The type of row transform to apply