CollectionViewDelegateColumnLayout

@objc
public protocol CollectionViewDelegateColumnLayout : CollectionViewDelegate

The delegate for CollectionViewColumnLayout to dynamically customize the layout

Spacing & Insets


                      
                      
                      collectionView(_:layout:numberOfColumnsInSection:)

Asks the delegate for the number fo columns in a section

Declaration

Swift

@objc
optional func collectionView(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, numberOfColumnsInSection section: Int) -> Int

Parameters

`collectionView`	The collection view
`collectionViewLayout`	The layout
`section`	A section index

Return Value

The desired number of columns in the section


                      
                      
                      collectionView(_:layout:insetForSectionAt:)

Asks the delegate for insets to be applied to content of a given section

Declaration

Swift

@objc
optional func collectionView(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, insetForSectionAt section: NSInteger) -> NSEdgeInsets

Parameters

`collectionView`	The collection view
`collectionViewLayout`	The layout
`section`	A section index

Return Value

Insets for the section


                      
                      
                      collectionView(_:layout:interitemSpacingForSectionAt:)

Asks the delegate for the item spacing to be applied to items of the same column of a section

Declaration

Swift

@objc
optional func collectionView(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, interitemSpacingForSectionAt section: Int) -> CGFloat

Parameters

`collectionView`	The collection view
`collectionViewLayout`	The layout
`section`	A section index

Return Value

The desired spacing between items in the same column


                      
                      
                      collectionview(_:layout:columnSpacingForSectionAt:)

Asks the delegate for the column spacing to applied to items in a given section

Declaration

Swift

@objc
optional func collectionview(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, columnSpacingForSectionAt section: Int) -> CGFloat

Parameters

`collectionView`	The collection view
`collectionViewLayout`	The layout
`section`	A section index

Return Value

The desired spacing between columns in the section

Item Size


                      
                      
                      collectionView(_:layout:heightForItemAt:)

The height for the item at the given indexPath (Priority 2)

Declaration

Swift

@objc
optional func collectionView(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, heightForItemAt indexPath: IndexPath) -> CGFloat

Parameters

`collectionView`	The collection view the item is in
`collectionViewLayout`	The CollectionViewLayout
`indexPath`	The indexPath for the item

Return Value

The height for the item


                      
                      
                      collectionView(_:layout:aspectRatioForItemAt:)

The aspect ration for the item at the given indexPath (Priority 1). Width and height must be greater than 0.

Declaration

Swift

@objc
optional func collectionView(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, aspectRatioForItemAt indexPath: IndexPath) -> CGSize

Parameters

`collectionView`	The collection view the item is in
`collectionViewLayout`	The CollectionViewLayout
`indexPath`	The indexPath for the item

Return Value

The aspect ration for the item

Header & Footer Size


                      
                      
                      collectionView(_:layout:heightForHeaderInSection:)

Asks the delegate for the height of the header in the given section

Declaration

Swift

@objc
optional func collectionView(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, heightForHeaderInSection section: Int) -> CGFloat

Parameters

`collectionView`	The collection view
`collectionViewLayout`	The layout
`section`	A section index

Return Value

The desired header height or 0 for no header


                      
                      
                      collectionView(_:layout:heightForFooterInSection:)

Asks the delegate for the height of the footer in the given section

Declaration

Swift

@objc
optional func collectionView(_ collectionView: CollectionView, layout collectionViewLayout: CollectionViewLayout, heightForFooterInSection section: Int) -> CGFloat

Parameters

`collectionView`	The collection view
`collectionViewLayout`	The layout
`section`	A section index

Return Value

The desired footer height or 0 for no footer